/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/unroll-cond-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 10:35:17,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 10:35:17,928 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 10:35:17,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 10:35:17,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 10:35:17,970 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 10:35:17,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 10:35:17,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 10:35:17,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 10:35:17,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 10:35:17,975 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 10:35:17,975 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 10:35:17,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 10:35:17,977 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 10:35:17,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 10:35:17,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 10:35:17,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 10:35:17,978 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 10:35:17,978 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 10:35:17,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 10:35:17,978 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 10:35:17,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 10:35:17,979 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 10:35:17,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 10:35:17,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 10:35:17,981 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 10:35:17,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 10:35:17,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:35:17,981 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 10:35:17,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 10:35:17,982 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 10:35:17,982 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 10:35:17,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 10:35:17,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 10:35:17,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 10:35:17,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 10:35:18,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 10:35:18,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 10:35:18,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 10:35:18,329 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 10:35:18,329 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 10:35:18,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-08-24 10:35:19,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 10:35:19,588 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 10:35:19,589 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2023-08-24 10:35:19,596 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bac08058/709991164511485e896478ab63b978eb/FLAG21d6b5a8d [2023-08-24 10:35:19,611 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bac08058/709991164511485e896478ab63b978eb [2023-08-24 10:35:19,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 10:35:19,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 10:35:19,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 10:35:19,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 10:35:19,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 10:35:19,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d3ca651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19, skipping insertion in model container [2023-08-24 10:35:19,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,646 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 10:35:19,823 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/unroll-cond-3.wvr.c[2641,2654] [2023-08-24 10:35:19,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:35:19,842 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 10:35:19,877 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/unroll-cond-3.wvr.c[2641,2654] [2023-08-24 10:35:19,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:35:19,894 INFO L206 MainTranslator]: Completed translation [2023-08-24 10:35:19,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19 WrapperNode [2023-08-24 10:35:19,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 10:35:19,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 10:35:19,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 10:35:19,896 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 10:35:19,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,949 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 166 [2023-08-24 10:35:19,949 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 10:35:19,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 10:35:19,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 10:35:19,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 10:35:19,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,973 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,974 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,978 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:19,997 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 10:35:19,998 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 10:35:19,998 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 10:35:19,998 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 10:35:19,999 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (1/1) ... [2023-08-24 10:35:20,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:35:20,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:35:20,026 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 10:35:20,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 10:35:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 10:35:20,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 10:35:20,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 10:35:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 10:35:20,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 10:35:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 10:35:20,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 10:35:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 10:35:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 10:35:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 10:35:20,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 10:35:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 10:35:20,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 10:35:20,070 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 10:35:20,181 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 10:35:20,182 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 10:35:20,526 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 10:35:20,534 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 10:35:20,534 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 10:35:20,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:35:20 BoogieIcfgContainer [2023-08-24 10:35:20,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 10:35:20,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 10:35:20,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 10:35:20,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 10:35:20,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 10:35:19" (1/3) ... [2023-08-24 10:35:20,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25dba7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:35:20, skipping insertion in model container [2023-08-24 10:35:20,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:35:19" (2/3) ... [2023-08-24 10:35:20,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25dba7dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:35:20, skipping insertion in model container [2023-08-24 10:35:20,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:35:20" (3/3) ... [2023-08-24 10:35:20,555 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2023-08-24 10:35:20,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 10:35:20,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 10:35:20,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 10:35:20,676 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 10:35:20,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 195 transitions, 406 flow [2023-08-24 10:35:20,821 INFO L124 PetriNetUnfolderBase]: 18/193 cut-off events. [2023-08-24 10:35:20,822 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:35:20,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 18/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-24 10:35:20,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 195 transitions, 406 flow [2023-08-24 10:35:20,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 185 transitions, 382 flow [2023-08-24 10:35:20,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 10:35:20,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 185 transitions, 382 flow [2023-08-24 10:35:20,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 185 transitions, 382 flow [2023-08-24 10:35:20,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 185 transitions, 382 flow [2023-08-24 10:35:20,927 INFO L124 PetriNetUnfolderBase]: 18/185 cut-off events. [2023-08-24 10:35:20,927 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:35:20,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 185 events. 18/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 281 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-24 10:35:20,933 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-08-24 10:35:26,637 INFO L134 LiptonReduction]: Checked pairs total: 3895 [2023-08-24 10:35:26,637 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-08-24 10:35:26,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 10:35:26,665 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;@5b0ac560, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 10:35:26,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 10:35:26,682 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 10:35:26,682 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 10:35:26,682 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:35:26,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:26,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:26,683 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 10:35:26,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1844223576, now seen corresponding path program 1 times [2023-08-24 10:35:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:26,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522874731] [2023-08-24 10:35:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:27,104 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 10:35:27,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:27,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522874731] [2023-08-24 10:35:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522874731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:27,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:27,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 10:35:27,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671893885] [2023-08-24 10:35:27,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:27,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 10:35:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 10:35:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 10:35:27,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 413 [2023-08-24 10:35:27,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:27,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 413 [2023-08-24 10:35:27,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:27,210 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-24 10:35:27,211 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 10:35:27,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 176 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-24 10:35:27,215 INFO L140 encePairwiseOnDemand]: 410/413 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-24 10:35:27,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-24 10:35:27,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 10:35:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 10:35:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-08-24 10:35:27,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132364810330912 [2023-08-24 10:35:27,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-08-24 10:35:27,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-08-24 10:35:27,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:27,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-08-24 10:35:27,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 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 10:35:27,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 413.0) internal successors, (1652), 4 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,253 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 512 transitions. [2023-08-24 10:35:27,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-24 10:35:27,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 10:35:27,256 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-24 10:35:27,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-24 10:35:27,260 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 10:35:27,263 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-24 10:35:27,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:27,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 10:35:27,265 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 10:35:27,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:27,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1134865933, now seen corresponding path program 1 times [2023-08-24 10:35:27,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:27,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192829367] [2023-08-24 10:35:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:27,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:27,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192829367] [2023-08-24 10:35:27,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192829367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:27,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:27,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:35:27,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424889569] [2023-08-24 10:35:27,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:35:27,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:27,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:35:27,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:35:27,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:35:27,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:27,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:35:27,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:27,774 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-08-24 10:35:27,774 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:35:27,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-24 10:35:27,776 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 10:35:27,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-24 10:35:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:35:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:35:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 805 transitions. [2023-08-24 10:35:27,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898305084745763 [2023-08-24 10:35:27,780 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 805 transitions. [2023-08-24 10:35:27,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 805 transitions. [2023-08-24 10:35:27,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:27,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 805 transitions. [2023-08-24 10:35:27,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.0) internal successors, (805), 5 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,789 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 805 transitions. [2023-08-24 10:35:27,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-24 10:35:27,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 10:35:27,791 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-24 10:35:27,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-24 10:35:27,792 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 10:35:27,792 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-24 10:35:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:27,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:27,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:27,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 10:35:27,794 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 10:35:27,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash 496616907, now seen corresponding path program 2 times [2023-08-24 10:35:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:27,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530905014] [2023-08-24 10:35:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:28,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:28,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530905014] [2023-08-24 10:35:28,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530905014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:28,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:28,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:35:28,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099857865] [2023-08-24 10:35:28,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:28,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:35:28,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:28,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:35:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:35:28,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:35:28,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:28,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:35:28,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:28,291 INFO L124 PetriNetUnfolderBase]: 109/198 cut-off events. [2023-08-24 10:35:28,291 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-08-24 10:35:28,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 198 events. 109/198 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 593 event pairs, 24 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 560. Up to 87 conditions per place. [2023-08-24 10:35:28,293 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 40 selfloop transitions, 12 changer transitions 0/52 dead transitions. [2023-08-24 10:35:28,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 52 transitions, 292 flow [2023-08-24 10:35:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 10:35:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 10:35:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 966 transitions. [2023-08-24 10:35:28,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898305084745763 [2023-08-24 10:35:28,296 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 966 transitions. [2023-08-24 10:35:28,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 966 transitions. [2023-08-24 10:35:28,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:28,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 966 transitions. [2023-08-24 10:35:28,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,304 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 413.0) internal successors, (2891), 7 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,304 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 6 states and 966 transitions. [2023-08-24 10:35:28,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 52 transitions, 292 flow [2023-08-24 10:35:28,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 52 transitions, 275 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 10:35:28,308 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 163 flow [2023-08-24 10:35:28,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-24 10:35:28,309 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2023-08-24 10:35:28,311 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 163 flow [2023-08-24 10:35:28,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:28,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:28,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 10:35:28,313 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 10:35:28,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash -872709857, now seen corresponding path program 3 times [2023-08-24 10:35:28,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988204768] [2023-08-24 10:35:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:28,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:28,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:28,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988204768] [2023-08-24 10:35:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988204768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:28,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:28,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:35:28,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719924458] [2023-08-24 10:35:28,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:28,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:35:28,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:28,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:35:28,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:35:28,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:35:28,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:28,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:35:28,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:28,640 INFO L124 PetriNetUnfolderBase]: 119/214 cut-off events. [2023-08-24 10:35:28,640 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2023-08-24 10:35:28,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 214 events. 119/214 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 28 based on Foata normal form. 4/187 useless extension candidates. Maximal degree in co-relation 778. Up to 111 conditions per place. [2023-08-24 10:35:28,642 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 40 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-08-24 10:35:28,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 376 flow [2023-08-24 10:35:28,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:35:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:35:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 806 transitions. [2023-08-24 10:35:28,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903147699757869 [2023-08-24 10:35:28,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 806 transitions. [2023-08-24 10:35:28,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 806 transitions. [2023-08-24 10:35:28,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:28,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 806 transitions. [2023-08-24 10:35:28,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,653 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 163 flow. Second operand 5 states and 806 transitions. [2023-08-24 10:35:28,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 376 flow [2023-08-24 10:35:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 362 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-24 10:35:28,657 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 255 flow [2023-08-24 10:35:28,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-24 10:35:28,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2023-08-24 10:35:28,658 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 255 flow [2023-08-24 10:35:28,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:28,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 10:35:28,659 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 10:35:28,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -4114561, now seen corresponding path program 4 times [2023-08-24 10:35:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:28,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189430295] [2023-08-24 10:35:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:28,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:28,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:28,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189430295] [2023-08-24 10:35:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189430295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:28,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:28,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:35:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475262390] [2023-08-24 10:35:28,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:28,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:35:28,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:28,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:35:28,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:35:28,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:35:28,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 255 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:28,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:35:28,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:28,982 INFO L124 PetriNetUnfolderBase]: 115/210 cut-off events. [2023-08-24 10:35:28,982 INFO L125 PetriNetUnfolderBase]: For 629/629 co-relation queries the response was YES. [2023-08-24 10:35:28,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 210 events. 115/210 cut-off events. For 629/629 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 654 event pairs, 36 based on Foata normal form. 4/189 useless extension candidates. Maximal degree in co-relation 848. Up to 167 conditions per place. [2023-08-24 10:35:28,985 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 33 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2023-08-24 10:35:28,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 430 flow [2023-08-24 10:35:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:35:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:35:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-08-24 10:35:28,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387409200968523 [2023-08-24 10:35:28,988 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-08-24 10:35:28,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-08-24 10:35:28,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:28,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-08-24 10:35:28,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:28,996 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 255 flow. Second operand 5 states and 800 transitions. [2023-08-24 10:35:28,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 430 flow [2023-08-24 10:35:29,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 414 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 10:35:29,002 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 347 flow [2023-08-24 10:35:29,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-24 10:35:29,004 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 10:35:29,004 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 347 flow [2023-08-24 10:35:29,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:29,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:29,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 10:35:29,005 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 10:35:29,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1316034913, now seen corresponding path program 5 times [2023-08-24 10:35:29,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:29,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482275546] [2023-08-24 10:35:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:29,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:29,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482275546] [2023-08-24 10:35:29,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482275546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:29,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:29,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:35:29,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693507632] [2023-08-24 10:35:29,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:29,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:35:29,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:29,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:35:29,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:35:29,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:35:29,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:29,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:35:29,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:29,365 INFO L124 PetriNetUnfolderBase]: 116/213 cut-off events. [2023-08-24 10:35:29,365 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2023-08-24 10:35:29,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 213 events. 116/213 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 694 event pairs, 24 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 920. Up to 113 conditions per place. [2023-08-24 10:35:29,367 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 41 selfloop transitions, 15 changer transitions 0/56 dead transitions. [2023-08-24 10:35:29,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 503 flow [2023-08-24 10:35:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:35:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:35:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-08-24 10:35:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893462469733656 [2023-08-24 10:35:29,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-08-24 10:35:29,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-08-24 10:35:29,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:29,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-08-24 10:35:29,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,376 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,376 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 347 flow. Second operand 5 states and 804 transitions. [2023-08-24 10:35:29,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 503 flow [2023-08-24 10:35:29,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 460 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-24 10:35:29,380 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 344 flow [2023-08-24 10:35:29,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-08-24 10:35:29,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 29 predicate places. [2023-08-24 10:35:29,381 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 344 flow [2023-08-24 10:35:29,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:29,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:29,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 10:35:29,382 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 10:35:29,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2043138631, now seen corresponding path program 6 times [2023-08-24 10:35:29,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:29,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852850] [2023-08-24 10:35:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:29,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:29,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:29,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852850] [2023-08-24 10:35:29,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:35:29,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:35:29,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:35:29,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677360503] [2023-08-24 10:35:29,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:35:29,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:35:29,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:29,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:35:29,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:35:29,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:35:29,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 344 flow. Second operand has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:29,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:35:29,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:29,670 INFO L124 PetriNetUnfolderBase]: 115/206 cut-off events. [2023-08-24 10:35:29,670 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2023-08-24 10:35:29,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 913 conditions, 206 events. 115/206 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 643 event pairs, 35 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 884. Up to 160 conditions per place. [2023-08-24 10:35:29,672 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 34 selfloop transitions, 18 changer transitions 0/52 dead transitions. [2023-08-24 10:35:29,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 472 flow [2023-08-24 10:35:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:35:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:35:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-08-24 10:35:29,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.387409200968523 [2023-08-24 10:35:29,675 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-08-24 10:35:29,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-08-24 10:35:29,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:29,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-08-24 10:35:29,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 413.0) internal successors, (2478), 6 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,681 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 344 flow. Second operand 5 states and 800 transitions. [2023-08-24 10:35:29,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 472 flow [2023-08-24 10:35:29,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 438 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 10:35:29,685 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 350 flow [2023-08-24 10:35:29,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-08-24 10:35:29,685 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 31 predicate places. [2023-08-24 10:35:29,686 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 350 flow [2023-08-24 10:35:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:29,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:29,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:29,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 10:35:29,687 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 10:35:29,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:35:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash -995119352, now seen corresponding path program 1 times [2023-08-24 10:35:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:35:29,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730120662] [2023-08-24 10:35:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:35:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:35:29,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:35:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730120662] [2023-08-24 10:35:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730120662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:35:29,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634241634] [2023-08-24 10:35:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:35:29,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:35:29,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:35:29,969 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 10:35:30,009 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 10:35:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:35:30,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 10:35:30,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:35:30,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:35:30,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:35:30,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:35:30,925 INFO L322 Elim1Store]: treesize reduction 78, result has 25.7 percent of original size [2023-08-24 10:35:30,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 632 treesize of output 319 [2023-08-24 10:35:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:35:31,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:35:31,961 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_137 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~f~0.base))) (let ((.cse1 (select .cse2 (+ c_~f~0.offset (* ~x2~0 4))))) (let ((.cse0 (select .cse2 (+ (* 4 .cse1) c_~f~0.offset)))) (or (< .cse0 0) (<= c_~size~0 .cse0) (<= c_~size~0 .cse1) (= (select .cse2 (+ (* .cse0 4) c_~f~0.offset)) c_~x1~0) (< .cse1 0)))))) is different from false [2023-08-24 10:35:33,791 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:35:33,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 154 [2023-08-24 10:35:33,818 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:35:33,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 934 treesize of output 838 [2023-08-24 10:35:33,888 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:35:33,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 170 [2023-08-24 10:35:33,958 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:35:33,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 263 treesize of output 165 [2023-08-24 10:35:35,655 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 10:35:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634241634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:35:35,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:35:35,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 10:35:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281934015] [2023-08-24 10:35:35,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:35:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:35:35,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:35:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:35:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=221, Unknown=1, NotChecked=30, Total=306 [2023-08-24 10:35:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 10:35:35,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 350 flow. Second operand has 18 states, 18 states have (on average 81.66666666666667) internal successors, (1470), 18 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:35,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:35:35,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 10:35:35,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:35:37,918 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 10:35:40,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:35:42,349 WARN L539 Checker$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 10:35:44,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:35:46,728 WARN L539 Checker$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 10:35:48,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:35:52,916 WARN L539 Checker$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 10:35:54,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:35:56,938 WARN L539 Checker$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 10:35:59,793 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 10:35:59,813 INFO L124 PetriNetUnfolderBase]: 351/612 cut-off events. [2023-08-24 10:35:59,814 INFO L125 PetriNetUnfolderBase]: For 1833/1833 co-relation queries the response was YES. [2023-08-24 10:35:59,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 612 events. 351/612 cut-off events. For 1833/1833 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2592 event pairs, 24 based on Foata normal form. 4/510 useless extension candidates. Maximal degree in co-relation 1991. Up to 209 conditions per place. [2023-08-24 10:35:59,822 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 73 selfloop transitions, 40 changer transitions 71/184 dead transitions. [2023-08-24 10:35:59,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 184 transitions, 1549 flow [2023-08-24 10:35:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 10:35:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 10:35:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1889 transitions. [2023-08-24 10:35:59,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20790226722430113 [2023-08-24 10:35:59,831 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1889 transitions. [2023-08-24 10:35:59,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1889 transitions. [2023-08-24 10:35:59,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:35:59,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1889 transitions. [2023-08-24 10:35:59,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 85.86363636363636) internal successors, (1889), 22 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:59,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:59,850 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:59,850 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 350 flow. Second operand 22 states and 1889 transitions. [2023-08-24 10:35:59,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 184 transitions, 1549 flow [2023-08-24 10:35:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 184 transitions, 1477 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 10:35:59,860 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 629 flow [2023-08-24 10:35:59,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=629, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-24 10:35:59,862 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2023-08-24 10:35:59,863 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 629 flow [2023-08-24 10:35:59,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.66666666666667) internal successors, (1470), 18 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:35:59,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:35:59,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:35:59,872 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 10:36:00,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:36:00,072 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 10:36:00,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:36:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1616738483, now seen corresponding path program 1 times [2023-08-24 10:36:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:36:00,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588310706] [2023-08-24 10:36:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:36:00,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:36:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:36:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:36:00,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:36:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588310706] [2023-08-24 10:36:00,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588310706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:36:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404000804] [2023-08-24 10:36:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:36:00,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:36:00,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:36:00,461 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 10:36:00,483 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 10:36:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:36:00,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 10:36:00,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:36:00,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:36:00,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:36:00,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:36:01,035 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:36:01,036 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 208 [2023-08-24 10:36:01,179 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 10:36:01,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:36:02,666 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:02,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-08-24 10:36:02,686 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:02,687 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 254 [2023-08-24 10:36:02,727 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:02,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 214 treesize of output 194 [2023-08-24 10:36:02,760 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:02,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 101 [2023-08-24 10:36:03,208 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:36:03,270 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 10:36:03,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404000804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:36:03,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:36:03,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 10:36:03,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635422963] [2023-08-24 10:36:03,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:36:03,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:36:03,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:36:03,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:36:03,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=370, Unknown=2, NotChecked=0, Total=462 [2023-08-24 10:36:03,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:36:03,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 629 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:03,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:36:03,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:36:03,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:36:06,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:36:12,598 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 65 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:36:24,374 WARN L234 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 69 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:36:35,793 WARN L234 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 65 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:36:38,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:36:39,500 INFO L124 PetriNetUnfolderBase]: 520/975 cut-off events. [2023-08-24 10:36:39,500 INFO L125 PetriNetUnfolderBase]: For 3204/3204 co-relation queries the response was YES. [2023-08-24 10:36:39,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 975 events. 520/975 cut-off events. For 3204/3204 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5032 event pairs, 25 based on Foata normal form. 17/819 useless extension candidates. Maximal degree in co-relation 4048. Up to 277 conditions per place. [2023-08-24 10:36:39,509 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 171 selfloop transitions, 108 changer transitions 48/327 dead transitions. [2023-08-24 10:36:39,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 327 transitions, 2620 flow [2023-08-24 10:36:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 10:36:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 10:36:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4646 transitions. [2023-08-24 10:36:39,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2556680607528065 [2023-08-24 10:36:39,523 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4646 transitions. [2023-08-24 10:36:39,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4646 transitions. [2023-08-24 10:36:39,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:36:39,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4646 transitions. [2023-08-24 10:36:39,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 105.5909090909091) internal successors, (4646), 44 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:39,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 413.0) internal successors, (18585), 45 states have internal predecessors, (18585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:39,560 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 413.0) internal successors, (18585), 45 states have internal predecessors, (18585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:39,560 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 629 flow. Second operand 44 states and 4646 transitions. [2023-08-24 10:36:39,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 327 transitions, 2620 flow [2023-08-24 10:36:39,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 327 transitions, 2226 flow, removed 134 selfloop flow, removed 11 redundant places. [2023-08-24 10:36:39,578 INFO L231 Difference]: Finished difference. Result has 131 places, 143 transitions, 1426 flow [2023-08-24 10:36:39,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1426, PETRI_PLACES=131, PETRI_TRANSITIONS=143} [2023-08-24 10:36:39,579 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2023-08-24 10:36:39,579 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 143 transitions, 1426 flow [2023-08-24 10:36:39,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:39,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:36:39,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:36:39,589 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 10:36:39,786 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,SelfDestructingSolverStorable8 [2023-08-24 10:36:39,787 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 10:36:39,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:36:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1938734729, now seen corresponding path program 2 times [2023-08-24 10:36:39,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:36:39,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321577365] [2023-08-24 10:36:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:36:39,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:36:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:36:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:36:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:36:39,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321577365] [2023-08-24 10:36:39,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321577365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:36:39,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579044431] [2023-08-24 10:36:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:36:39,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:36:39,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:36:39,989 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 10:36:40,016 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 10:36:40,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:36:40,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:36:40,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 10:36:40,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:36:40,424 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:36:40,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 212 [2023-08-24 10:36:40,528 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 10:36:40,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:36:41,653 INFO L322 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2023-08-24 10:36:41,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 45 [2023-08-24 10:36:41,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-24 10:36:41,695 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 10:36:41,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-08-24 10:36:41,838 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 10:36:41,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579044431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:36:41,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:36:41,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 10:36:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705133306] [2023-08-24 10:36:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:36:41,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:36:41,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:36:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:36:41,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-08-24 10:36:41,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 413 [2023-08-24 10:36:41,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 143 transitions, 1426 flow. Second operand has 18 states, 18 states have (on average 108.66666666666667) internal successors, (1956), 18 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:41,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:36:41,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 413 [2023-08-24 10:36:41,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:36:42,654 INFO L124 PetriNetUnfolderBase]: 495/918 cut-off events. [2023-08-24 10:36:42,655 INFO L125 PetriNetUnfolderBase]: For 6278/6278 co-relation queries the response was YES. [2023-08-24 10:36:42,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4838 conditions, 918 events. 495/918 cut-off events. For 6278/6278 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4578 event pairs, 127 based on Foata normal form. 9/926 useless extension candidates. Maximal degree in co-relation 4707. Up to 680 conditions per place. [2023-08-24 10:36:42,663 INFO L140 encePairwiseOnDemand]: 403/413 looper letters, 133 selfloop transitions, 49 changer transitions 17/199 dead transitions. [2023-08-24 10:36:42,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 199 transitions, 2106 flow [2023-08-24 10:36:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 10:36:42,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 10:36:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2117 transitions. [2023-08-24 10:36:42,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2697846310691984 [2023-08-24 10:36:42,668 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2117 transitions. [2023-08-24 10:36:42,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2117 transitions. [2023-08-24 10:36:42,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:36:42,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2117 transitions. [2023-08-24 10:36:42,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 111.42105263157895) internal successors, (2117), 19 states have internal predecessors, (2117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:42,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 413.0) internal successors, (8260), 20 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:42,682 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 413.0) internal successors, (8260), 20 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:42,682 INFO L175 Difference]: Start difference. First operand has 131 places, 143 transitions, 1426 flow. Second operand 19 states and 2117 transitions. [2023-08-24 10:36:42,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 199 transitions, 2106 flow [2023-08-24 10:36:42,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 199 transitions, 1965 flow, removed 63 selfloop flow, removed 11 redundant places. [2023-08-24 10:36:42,709 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1466 flow [2023-08-24 10:36:42,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1466, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2023-08-24 10:36:42,710 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2023-08-24 10:36:42,710 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1466 flow [2023-08-24 10:36:42,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.66666666666667) internal successors, (1956), 18 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:42,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:36:42,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:36:42,717 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 10:36:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:36:42,917 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 10:36:42,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:36:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1463182197, now seen corresponding path program 3 times [2023-08-24 10:36:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:36:42,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706234748] [2023-08-24 10:36:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:36:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:36:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:36:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:36:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:36:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706234748] [2023-08-24 10:36:43,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706234748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:36:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555852945] [2023-08-24 10:36:43,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:36:43,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:36:43,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:36:43,109 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 10:36:43,112 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 10:36:43,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:36:43,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:36:43,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 10:36:43,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:36:43,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:36:43,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:36:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:36:43,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 10:36:43,658 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:36:43,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 208 [2023-08-24 10:36:43,750 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 10:36:43,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:36:45,099 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:45,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 89 [2023-08-24 10:36:45,120 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:45,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 348 [2023-08-24 10:36:45,143 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:45,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 180 [2023-08-24 10:36:45,173 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:36:45,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 101 [2023-08-24 10:36:45,606 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:36:45,772 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 10:36:45,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555852945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:36:45,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:36:45,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 10:36:45,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397763646] [2023-08-24 10:36:45,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:36:45,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:36:45,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:36:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:36:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=382, Unknown=2, NotChecked=0, Total=462 [2023-08-24 10:36:45,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:36:45,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1466 flow. Second operand has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:36:45,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:36:45,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:36:45,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:36:52,412 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 47 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:37:02,954 WARN L234 SmtUtils]: Spent 10.24s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:37:21,115 WARN L234 SmtUtils]: Spent 10.24s on a formula simplification. DAG size of input: 86 DAG size of output: 55 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:37:21,912 INFO L124 PetriNetUnfolderBase]: 672/1212 cut-off events. [2023-08-24 10:37:21,912 INFO L125 PetriNetUnfolderBase]: For 6669/6669 co-relation queries the response was YES. [2023-08-24 10:37:21,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6082 conditions, 1212 events. 672/1212 cut-off events. For 6669/6669 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6330 event pairs, 69 based on Foata normal form. 18/1229 useless extension candidates. Maximal degree in co-relation 5975. Up to 332 conditions per place. [2023-08-24 10:37:21,921 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 118 selfloop transitions, 93 changer transitions 93/304 dead transitions. [2023-08-24 10:37:21,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 304 transitions, 3002 flow [2023-08-24 10:37:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 10:37:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 10:37:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3263 transitions. [2023-08-24 10:37:21,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25486214168554244 [2023-08-24 10:37:21,927 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3263 transitions. [2023-08-24 10:37:21,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3263 transitions. [2023-08-24 10:37:21,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:21,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3263 transitions. [2023-08-24 10:37:21,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.25806451612904) internal successors, (3263), 31 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:21,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 413.0) internal successors, (13216), 32 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:21,946 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 413.0) internal successors, (13216), 32 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:21,946 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1466 flow. Second operand 31 states and 3263 transitions. [2023-08-24 10:37:21,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 304 transitions, 3002 flow [2023-08-24 10:37:21,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 304 transitions, 2900 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-08-24 10:37:21,986 INFO L231 Difference]: Finished difference. Result has 157 places, 134 transitions, 1553 flow [2023-08-24 10:37:21,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1553, PETRI_PLACES=157, PETRI_TRANSITIONS=134} [2023-08-24 10:37:21,987 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-08-24 10:37:21,987 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 134 transitions, 1553 flow [2023-08-24 10:37:21,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:21,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:21,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:22,000 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 10:37:22,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:22,200 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 10:37:22,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:22,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1631552755, now seen corresponding path program 4 times [2023-08-24 10:37:22,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:22,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651129719] [2023-08-24 10:37:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:22,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:23,218 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 10:37:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651129719] [2023-08-24 10:37:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651129719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824586483] [2023-08-24 10:37:23,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:37:23,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:23,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:23,219 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 10:37:23,220 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 10:37:23,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:37:23,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:23,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 10:37:23,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:23,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:37:23,370 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:37:23,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:37:23,744 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:37:23,758 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-24 10:37:23,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 24 [2023-08-24 10:37:23,796 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 10:37:23,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:27,826 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:27,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 92 [2023-08-24 10:37:27,851 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:27,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 540 treesize of output 500 [2023-08-24 10:37:27,890 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:27,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 104 [2023-08-24 10:37:27,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:27,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 101 [2023-08-24 10:37:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:37:28,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824586483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:28,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:28,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-24 10:37:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106123927] [2023-08-24 10:37:28,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 10:37:28,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:28,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 10:37:28,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=630, Unknown=6, NotChecked=0, Total=756 [2023-08-24 10:37:28,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:37:28,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 134 transitions, 1553 flow. Second operand has 28 states, 28 states have (on average 100.67857142857143) internal successors, (2819), 28 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:28,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:28,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:37:28,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:29,359 INFO L124 PetriNetUnfolderBase]: 378/702 cut-off events. [2023-08-24 10:37:29,360 INFO L125 PetriNetUnfolderBase]: For 4672/4672 co-relation queries the response was YES. [2023-08-24 10:37:29,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 702 events. 378/702 cut-off events. For 4672/4672 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3223 event pairs, 63 based on Foata normal form. 2/703 useless extension candidates. Maximal degree in co-relation 3801. Up to 592 conditions per place. [2023-08-24 10:37:29,367 INFO L140 encePairwiseOnDemand]: 404/413 looper letters, 114 selfloop transitions, 16 changer transitions 27/157 dead transitions. [2023-08-24 10:37:29,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 157 transitions, 1975 flow [2023-08-24 10:37:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 10:37:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 10:37:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1244 transitions. [2023-08-24 10:37:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2510088781275222 [2023-08-24 10:37:29,370 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1244 transitions. [2023-08-24 10:37:29,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1244 transitions. [2023-08-24 10:37:29,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:29,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1244 transitions. [2023-08-24 10:37:29,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 103.66666666666667) internal successors, (1244), 12 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:29,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:29,376 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 413.0) internal successors, (5369), 13 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:29,376 INFO L175 Difference]: Start difference. First operand has 157 places, 134 transitions, 1553 flow. Second operand 12 states and 1244 transitions. [2023-08-24 10:37:29,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 157 transitions, 1975 flow [2023-08-24 10:37:29,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 157 transitions, 1778 flow, removed 43 selfloop flow, removed 31 redundant places. [2023-08-24 10:37:29,401 INFO L231 Difference]: Finished difference. Result has 124 places, 125 transitions, 1318 flow [2023-08-24 10:37:29,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1318, PETRI_PLACES=124, PETRI_TRANSITIONS=125} [2023-08-24 10:37:29,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2023-08-24 10:37:29,402 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 125 transitions, 1318 flow [2023-08-24 10:37:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.67857142857143) internal successors, (2819), 28 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:29,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:29,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:29,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 10:37:29,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 10:37:29,603 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 10:37:29,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -620352544, now seen corresponding path program 5 times [2023-08-24 10:37:29,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:29,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864709897] [2023-08-24 10:37:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:29,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:29,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864709897] [2023-08-24 10:37:29,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864709897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:29,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454128853] [2023-08-24 10:37:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:37:29,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:29,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:29,897 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 10:37:29,921 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 10:37:30,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:37:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:30,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:37:30,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:30,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-24 10:37:30,215 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2023-08-24 10:37:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:30,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:30,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:37:30,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:37:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454128853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:30,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:30,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 10:37:30,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581081891] [2023-08-24 10:37:30,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:30,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 10:37:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 10:37:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 10:37:30,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:37:30,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 125 transitions, 1318 flow. Second operand has 13 states, 13 states have (on average 155.07692307692307) internal successors, (2016), 13 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:30,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:30,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:37:30,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:31,354 INFO L124 PetriNetUnfolderBase]: 531/942 cut-off events. [2023-08-24 10:37:31,354 INFO L125 PetriNetUnfolderBase]: For 4603/4603 co-relation queries the response was YES. [2023-08-24 10:37:31,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4829 conditions, 942 events. 531/942 cut-off events. For 4603/4603 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4513 event pairs, 69 based on Foata normal form. 6/947 useless extension candidates. Maximal degree in co-relation 4768. Up to 271 conditions per place. [2023-08-24 10:37:31,364 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 147 selfloop transitions, 75 changer transitions 0/222 dead transitions. [2023-08-24 10:37:31,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 222 transitions, 2349 flow [2023-08-24 10:37:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 10:37:31,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 10:37:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2417 transitions. [2023-08-24 10:37:31,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901533494753834 [2023-08-24 10:37:31,367 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2417 transitions. [2023-08-24 10:37:31,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2417 transitions. [2023-08-24 10:37:31,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:31,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2417 transitions. [2023-08-24 10:37:31,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 161.13333333333333) internal successors, (2417), 15 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:31,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:31,376 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:31,376 INFO L175 Difference]: Start difference. First operand has 124 places, 125 transitions, 1318 flow. Second operand 15 states and 2417 transitions. [2023-08-24 10:37:31,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 222 transitions, 2349 flow [2023-08-24 10:37:31,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 222 transitions, 2272 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 10:37:31,401 INFO L231 Difference]: Finished difference. Result has 123 places, 147 transitions, 1715 flow [2023-08-24 10:37:31,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1715, PETRI_PLACES=123, PETRI_TRANSITIONS=147} [2023-08-24 10:37:31,401 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-08-24 10:37:31,402 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 147 transitions, 1715 flow [2023-08-24 10:37:31,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.07692307692307) internal successors, (2016), 13 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:31,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:31,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:31,408 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 10:37:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:31,608 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 10:37:31,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1077253207, now seen corresponding path program 2 times [2023-08-24 10:37:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231120421] [2023-08-24 10:37:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:31,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:31,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231120421] [2023-08-24 10:37:31,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231120421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:31,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113440724] [2023-08-24 10:37:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:37:31,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:31,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:31,787 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 10:37:31,808 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 10:37:31,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:37:31,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:31,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:37:31,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:32,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:32,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:37:32,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:37:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:32,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113440724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:32,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:32,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 10:37:32,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714804106] [2023-08-24 10:37:32,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:32,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:37:32,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:37:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:37:32,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:37:32,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 147 transitions, 1715 flow. Second operand has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:32,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:32,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:37:32,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:33,036 INFO L124 PetriNetUnfolderBase]: 540/963 cut-off events. [2023-08-24 10:37:33,037 INFO L125 PetriNetUnfolderBase]: For 5795/5795 co-relation queries the response was YES. [2023-08-24 10:37:33,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5298 conditions, 963 events. 540/963 cut-off events. For 5795/5795 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4711 event pairs, 91 based on Foata normal form. 12/974 useless extension candidates. Maximal degree in co-relation 5236. Up to 354 conditions per place. [2023-08-24 10:37:33,046 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 126 selfloop transitions, 84 changer transitions 0/210 dead transitions. [2023-08-24 10:37:33,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 210 transitions, 2436 flow [2023-08-24 10:37:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:37:33,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:37:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2543 transitions. [2023-08-24 10:37:33,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3848365617433414 [2023-08-24 10:37:33,050 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2543 transitions. [2023-08-24 10:37:33,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2543 transitions. [2023-08-24 10:37:33,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:33,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2543 transitions. [2023-08-24 10:37:33,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 158.9375) internal successors, (2543), 16 states have internal predecessors, (2543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:33,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:33,058 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:33,058 INFO L175 Difference]: Start difference. First operand has 123 places, 147 transitions, 1715 flow. Second operand 16 states and 2543 transitions. [2023-08-24 10:37:33,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 210 transitions, 2436 flow [2023-08-24 10:37:33,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 210 transitions, 2353 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-24 10:37:33,090 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1885 flow [2023-08-24 10:37:33,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1885, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2023-08-24 10:37:33,091 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-08-24 10:37:33,091 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1885 flow [2023-08-24 10:37:33,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:33,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:33,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:33,100 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 10:37:33,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:33,301 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 10:37:33,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:33,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1430700406, now seen corresponding path program 6 times [2023-08-24 10:37:33,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:33,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328604722] [2023-08-24 10:37:33,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:33,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:33,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328604722] [2023-08-24 10:37:33,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328604722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:33,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976369723] [2023-08-24 10:37:33,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:37:33,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:33,562 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 10:37:33,587 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 10:37:33,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:37:33,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:33,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 10:37:33,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:33,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:33,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 217 [2023-08-24 10:37:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:34,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:35,108 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:35,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 185 [2023-08-24 10:37:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:36,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976369723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:36,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:36,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 10:37:36,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734300894] [2023-08-24 10:37:36,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:36,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:37:36,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:36,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:37:36,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:37:36,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 10:37:36,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1885 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:36,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 10:37:36,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:38,815 INFO L124 PetriNetUnfolderBase]: 641/1174 cut-off events. [2023-08-24 10:37:38,815 INFO L125 PetriNetUnfolderBase]: For 7523/7523 co-relation queries the response was YES. [2023-08-24 10:37:38,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 1174 events. 641/1174 cut-off events. For 7523/7523 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6231 event pairs, 88 based on Foata normal form. 8/1181 useless extension candidates. Maximal degree in co-relation 6660. Up to 793 conditions per place. [2023-08-24 10:37:38,826 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 181 selfloop transitions, 62 changer transitions 16/259 dead transitions. [2023-08-24 10:37:38,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 259 transitions, 3084 flow [2023-08-24 10:37:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 10:37:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 10:37:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2531 transitions. [2023-08-24 10:37:38,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3064164648910412 [2023-08-24 10:37:38,830 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2531 transitions. [2023-08-24 10:37:38,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2531 transitions. [2023-08-24 10:37:38,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:38,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2531 transitions. [2023-08-24 10:37:38,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.55) internal successors, (2531), 20 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:38,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:38,839 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 413.0) internal successors, (8673), 21 states have internal predecessors, (8673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:38,840 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1885 flow. Second operand 20 states and 2531 transitions. [2023-08-24 10:37:38,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 259 transitions, 3084 flow [2023-08-24 10:37:38,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 259 transitions, 2981 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-08-24 10:37:38,881 INFO L231 Difference]: Finished difference. Result has 163 places, 180 transitions, 2330 flow [2023-08-24 10:37:38,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2330, PETRI_PLACES=163, PETRI_TRANSITIONS=180} [2023-08-24 10:37:38,882 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2023-08-24 10:37:38,882 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 180 transitions, 2330 flow [2023-08-24 10:37:38,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:38,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:38,883 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:38,893 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 10:37:39,088 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,SelfDestructingSolverStorable14 [2023-08-24 10:37:39,089 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 10:37:39,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2101387973, now seen corresponding path program 3 times [2023-08-24 10:37:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:39,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116563616] [2023-08-24 10:37:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:39,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:39,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116563616] [2023-08-24 10:37:39,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116563616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:39,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899380400] [2023-08-24 10:37:39,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:37:39,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:39,336 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 10:37:39,376 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 10:37:39,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:37:39,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:39,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:37:39,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:39,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:39,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:37:39,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:37:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:40,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899380400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:40,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:40,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-08-24 10:37:40,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283542392] [2023-08-24 10:37:40,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:40,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 10:37:40,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 10:37:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-24 10:37:40,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:37:40,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 180 transitions, 2330 flow. Second operand has 10 states, 10 states have (on average 155.3) internal successors, (1553), 10 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:40,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:40,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:37:40,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:40,823 INFO L124 PetriNetUnfolderBase]: 662/1203 cut-off events. [2023-08-24 10:37:40,823 INFO L125 PetriNetUnfolderBase]: For 10362/10362 co-relation queries the response was YES. [2023-08-24 10:37:40,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7414 conditions, 1203 events. 662/1203 cut-off events. For 10362/10362 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6433 event pairs, 116 based on Foata normal form. 24/1226 useless extension candidates. Maximal degree in co-relation 7334. Up to 414 conditions per place. [2023-08-24 10:37:40,835 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 142 selfloop transitions, 111 changer transitions 0/253 dead transitions. [2023-08-24 10:37:40,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 253 transitions, 3232 flow [2023-08-24 10:37:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 10:37:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 10:37:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2717 transitions. [2023-08-24 10:37:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38698191140863125 [2023-08-24 10:37:40,838 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2717 transitions. [2023-08-24 10:37:40,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2717 transitions. [2023-08-24 10:37:40,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:40,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2717 transitions. [2023-08-24 10:37:40,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 159.8235294117647) internal successors, (2717), 17 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:40,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 413.0) internal successors, (7434), 18 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:40,847 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 413.0) internal successors, (7434), 18 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:40,847 INFO L175 Difference]: Start difference. First operand has 163 places, 180 transitions, 2330 flow. Second operand 17 states and 2717 transitions. [2023-08-24 10:37:40,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 253 transitions, 3232 flow [2023-08-24 10:37:40,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 253 transitions, 3099 flow, removed 39 selfloop flow, removed 9 redundant places. [2023-08-24 10:37:40,902 INFO L231 Difference]: Finished difference. Result has 172 places, 191 transitions, 2632 flow [2023-08-24 10:37:40,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2632, PETRI_PLACES=172, PETRI_TRANSITIONS=191} [2023-08-24 10:37:40,903 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2023-08-24 10:37:40,903 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 191 transitions, 2632 flow [2023-08-24 10:37:40,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 155.3) internal successors, (1553), 10 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:40,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:40,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:40,911 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 10:37:41,109 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,SelfDestructingSolverStorable15 [2023-08-24 10:37:41,109 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 10:37:41,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:41,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2016599651, now seen corresponding path program 4 times [2023-08-24 10:37:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:41,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432292318] [2023-08-24 10:37:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:41,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432292318] [2023-08-24 10:37:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432292318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770305196] [2023-08-24 10:37:41,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:37:41,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:41,318 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 10:37:41,322 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 10:37:41,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:37:41,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:41,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:37:41,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:41,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:41,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:37:41,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:37:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:41,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770305196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:41,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 10:37:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540266920] [2023-08-24 10:37:41,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:41,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:37:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:37:41,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:37:41,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:37:41,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 191 transitions, 2632 flow. Second operand has 12 states, 12 states have (on average 155.33333333333334) internal successors, (1864), 12 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:41,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:41,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:37:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:42,725 INFO L124 PetriNetUnfolderBase]: 714/1309 cut-off events. [2023-08-24 10:37:42,725 INFO L125 PetriNetUnfolderBase]: For 12688/12688 co-relation queries the response was YES. [2023-08-24 10:37:42,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8452 conditions, 1309 events. 714/1309 cut-off events. For 12688/12688 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7198 event pairs, 170 based on Foata normal form. 28/1336 useless extension candidates. Maximal degree in co-relation 8370. Up to 675 conditions per place. [2023-08-24 10:37:42,738 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 176 selfloop transitions, 108 changer transitions 0/284 dead transitions. [2023-08-24 10:37:42,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 284 transitions, 3827 flow [2023-08-24 10:37:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 10:37:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 10:37:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2883 transitions. [2023-08-24 10:37:42,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878127522195319 [2023-08-24 10:37:42,748 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2883 transitions. [2023-08-24 10:37:42,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2883 transitions. [2023-08-24 10:37:42,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:42,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2883 transitions. [2023-08-24 10:37:42,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 160.16666666666666) internal successors, (2883), 18 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:42,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 413.0) internal successors, (7847), 19 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:42,757 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 413.0) internal successors, (7847), 19 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:42,757 INFO L175 Difference]: Start difference. First operand has 172 places, 191 transitions, 2632 flow. Second operand 18 states and 2883 transitions. [2023-08-24 10:37:42,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 284 transitions, 3827 flow [2023-08-24 10:37:42,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 284 transitions, 3683 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-24 10:37:42,825 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 3203 flow [2023-08-24 10:37:42,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3203, PETRI_PLACES=190, PETRI_TRANSITIONS=216} [2023-08-24 10:37:42,826 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 169 predicate places. [2023-08-24 10:37:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 3203 flow [2023-08-24 10:37:42,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.33333333333334) internal successors, (1864), 12 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:42,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:42,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:42,837 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 10:37:43,032 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,SelfDestructingSolverStorable16 [2023-08-24 10:37:43,032 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 10:37:43,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:43,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1897565900, now seen corresponding path program 7 times [2023-08-24 10:37:43,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:43,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801842834] [2023-08-24 10:37:43,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:43,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:43,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801842834] [2023-08-24 10:37:43,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801842834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:43,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136047022] [2023-08-24 10:37:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:37:43,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:43,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:43,309 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 10:37:43,335 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 10:37:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:43,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 10:37:43,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:43,760 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 10:37:43,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 205 [2023-08-24 10:37:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:43,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:44,919 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:44,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 185 [2023-08-24 10:37:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136047022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:45,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:45,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 10:37:45,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830956140] [2023-08-24 10:37:45,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:45,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:37:45,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:37:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:37:45,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 10:37:45,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 216 transitions, 3203 flow. Second operand has 17 states, 17 states have (on average 122.29411764705883) internal successors, (2079), 17 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:45,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:45,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 10:37:45,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:49,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:37:51,260 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 [] [2023-08-24 10:37:52,678 INFO L124 PetriNetUnfolderBase]: 756/1437 cut-off events. [2023-08-24 10:37:52,678 INFO L125 PetriNetUnfolderBase]: For 13499/13499 co-relation queries the response was YES. [2023-08-24 10:37:52,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9351 conditions, 1437 events. 756/1437 cut-off events. For 13499/13499 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8362 event pairs, 41 based on Foata normal form. 8/1444 useless extension candidates. Maximal degree in co-relation 9264. Up to 707 conditions per place. [2023-08-24 10:37:52,691 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 190 selfloop transitions, 121 changer transitions 11/322 dead transitions. [2023-08-24 10:37:52,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 322 transitions, 4622 flow [2023-08-24 10:37:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 10:37:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 10:37:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2782 transitions. [2023-08-24 10:37:52,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3061853400836452 [2023-08-24 10:37:52,695 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2782 transitions. [2023-08-24 10:37:52,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2782 transitions. [2023-08-24 10:37:52,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:52,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2782 transitions. [2023-08-24 10:37:52,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 126.45454545454545) internal successors, (2782), 22 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:52,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:52,705 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:52,705 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 3203 flow. Second operand 22 states and 2782 transitions. [2023-08-24 10:37:52,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 322 transitions, 4622 flow [2023-08-24 10:37:52,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 322 transitions, 4389 flow, removed 96 selfloop flow, removed 7 redundant places. [2023-08-24 10:37:52,802 INFO L231 Difference]: Finished difference. Result has 213 places, 241 transitions, 3666 flow [2023-08-24 10:37:52,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3666, PETRI_PLACES=213, PETRI_TRANSITIONS=241} [2023-08-24 10:37:52,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 192 predicate places. [2023-08-24 10:37:52,803 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 241 transitions, 3666 flow [2023-08-24 10:37:52,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.29411764705883) internal successors, (2079), 17 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:52,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:52,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:52,809 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 10:37:53,004 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,SelfDestructingSolverStorable17 [2023-08-24 10:37:53,004 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 10:37:53,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1833892866, now seen corresponding path program 8 times [2023-08-24 10:37:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241520567] [2023-08-24 10:37:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:53,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:53,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:53,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241520567] [2023-08-24 10:37:53,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241520567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:53,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858919299] [2023-08-24 10:37:53,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:37:53,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:53,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:53,185 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 10:37:53,210 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 10:37:53,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:37:53,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:53,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 10:37:53,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:53,654 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:53,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-08-24 10:37:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:53,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:54,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:54,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 320 treesize of output 312 [2023-08-24 10:37:55,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:55,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858919299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:55,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:55,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 10:37:55,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357806422] [2023-08-24 10:37:55,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:55,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:37:55,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:55,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:37:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:37:55,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 10:37:55,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 241 transitions, 3666 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:55,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:55,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 10:37:55,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:56,351 INFO L124 PetriNetUnfolderBase]: 836/1650 cut-off events. [2023-08-24 10:37:56,351 INFO L125 PetriNetUnfolderBase]: For 15962/15962 co-relation queries the response was YES. [2023-08-24 10:37:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10947 conditions, 1650 events. 836/1650 cut-off events. For 15962/15962 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10321 event pairs, 7 based on Foata normal form. 5/1654 useless extension candidates. Maximal degree in co-relation 10851. Up to 641 conditions per place. [2023-08-24 10:37:56,363 INFO L140 encePairwiseOnDemand]: 404/413 looper letters, 161 selfloop transitions, 185 changer transitions 12/358 dead transitions. [2023-08-24 10:37:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 358 transitions, 5477 flow [2023-08-24 10:37:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 10:37:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 10:37:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2647 transitions. [2023-08-24 10:37:56,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30520004612014295 [2023-08-24 10:37:56,372 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2647 transitions. [2023-08-24 10:37:56,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2647 transitions. [2023-08-24 10:37:56,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:56,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2647 transitions. [2023-08-24 10:37:56,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 126.04761904761905) internal successors, (2647), 21 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:56,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 413.0) internal successors, (9086), 22 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:56,386 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 413.0) internal successors, (9086), 22 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:56,386 INFO L175 Difference]: Start difference. First operand has 213 places, 241 transitions, 3666 flow. Second operand 21 states and 2647 transitions. [2023-08-24 10:37:56,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 358 transitions, 5477 flow [2023-08-24 10:37:56,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 358 transitions, 5117 flow, removed 94 selfloop flow, removed 9 redundant places. [2023-08-24 10:37:56,479 INFO L231 Difference]: Finished difference. Result has 229 places, 286 transitions, 4475 flow [2023-08-24 10:37:56,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4475, PETRI_PLACES=229, PETRI_TRANSITIONS=286} [2023-08-24 10:37:56,480 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2023-08-24 10:37:56,480 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 286 transitions, 4475 flow [2023-08-24 10:37:56,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:56,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:56,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:56,485 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 10:37:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:56,681 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 10:37:56,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1038064080, now seen corresponding path program 9 times [2023-08-24 10:37:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366631269] [2023-08-24 10:37:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:56,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366631269] [2023-08-24 10:37:56,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366631269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111686505] [2023-08-24 10:37:56,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:37:56,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:56,913 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 10:37:56,921 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 10:37:57,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:37:57,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:57,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 10:37:57,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:57,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:57,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-08-24 10:37:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:57,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:57,619 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:57,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 320 treesize of output 312 [2023-08-24 10:37:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:57,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111686505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:57,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:57,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 10:37:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146648542] [2023-08-24 10:37:57,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:57,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:37:57,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:37:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:37:57,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 413 [2023-08-24 10:37:57,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 286 transitions, 4475 flow. Second operand has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:57,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:57,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 413 [2023-08-24 10:37:57,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:58,692 INFO L124 PetriNetUnfolderBase]: 856/1764 cut-off events. [2023-08-24 10:37:58,692 INFO L125 PetriNetUnfolderBase]: For 18000/18000 co-relation queries the response was YES. [2023-08-24 10:37:58,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12235 conditions, 1764 events. 856/1764 cut-off events. For 18000/18000 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11674 event pairs, 41 based on Foata normal form. 5/1768 useless extension candidates. Maximal degree in co-relation 12135. Up to 823 conditions per place. [2023-08-24 10:37:58,709 INFO L140 encePairwiseOnDemand]: 405/413 looper letters, 210 selfloop transitions, 142 changer transitions 5/357 dead transitions. [2023-08-24 10:37:58,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 357 transitions, 5856 flow [2023-08-24 10:37:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:37:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:37:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2014 transitions. [2023-08-24 10:37:58,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047820823244552 [2023-08-24 10:37:58,719 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2014 transitions. [2023-08-24 10:37:58,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2014 transitions. [2023-08-24 10:37:58,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:58,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2014 transitions. [2023-08-24 10:37:58,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 125.875) internal successors, (2014), 16 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:58,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:58,726 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:58,727 INFO L175 Difference]: Start difference. First operand has 229 places, 286 transitions, 4475 flow. Second operand 16 states and 2014 transitions. [2023-08-24 10:37:58,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 357 transitions, 5856 flow [2023-08-24 10:37:58,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 357 transitions, 5620 flow, removed 67 selfloop flow, removed 18 redundant places. [2023-08-24 10:37:58,908 INFO L231 Difference]: Finished difference. Result has 233 places, 299 transitions, 4939 flow [2023-08-24 10:37:58,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=4273, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4939, PETRI_PLACES=233, PETRI_TRANSITIONS=299} [2023-08-24 10:37:58,909 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 212 predicate places. [2023-08-24 10:37:58,909 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 299 transitions, 4939 flow [2023-08-24 10:37:58,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 122.17647058823529) internal successors, (2077), 17 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:58,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:58,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:58,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 10:37:59,110 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,SelfDestructingSolverStorable19 [2023-08-24 10:37:59,110 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 10:37:59,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 426952075, now seen corresponding path program 5 times [2023-08-24 10:37:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477334957] [2023-08-24 10:37:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:59,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477334957] [2023-08-24 10:37:59,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477334957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:59,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582535706] [2023-08-24 10:37:59,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:37:59,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:59,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:59,289 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 10:37:59,311 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 10:37:59,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:37:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:37:59,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:37:59,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:59,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-24 10:37:59,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-24 10:37:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:37:59,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:59,952 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 10:37:59,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:38:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:00,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582535706] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:00,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:00,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 10:38:00,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451863848] [2023-08-24 10:38:00,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 10:38:00,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 10:38:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-24 10:38:00,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:38:00,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 299 transitions, 4939 flow. Second operand has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:00,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:00,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:38:00,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:01,025 INFO L124 PetriNetUnfolderBase]: 1056/2116 cut-off events. [2023-08-24 10:38:01,025 INFO L125 PetriNetUnfolderBase]: For 22082/22082 co-relation queries the response was YES. [2023-08-24 10:38:01,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 2116 events. 1056/2116 cut-off events. For 22082/22082 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14124 event pairs, 35 based on Foata normal form. 4/2119 useless extension candidates. Maximal degree in co-relation 14676. Up to 661 conditions per place. [2023-08-24 10:38:01,044 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 227 selfloop transitions, 189 changer transitions 0/416 dead transitions. [2023-08-24 10:38:01,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 416 transitions, 7100 flow [2023-08-24 10:38:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 10:38:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 10:38:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2399 transitions. [2023-08-24 10:38:01,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872477804681195 [2023-08-24 10:38:01,047 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2399 transitions. [2023-08-24 10:38:01,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2399 transitions. [2023-08-24 10:38:01,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:01,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2399 transitions. [2023-08-24 10:38:01,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 159.93333333333334) internal successors, (2399), 15 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:01,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:01,055 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 413.0) internal successors, (6608), 16 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:01,055 INFO L175 Difference]: Start difference. First operand has 233 places, 299 transitions, 4939 flow. Second operand 15 states and 2399 transitions. [2023-08-24 10:38:01,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 416 transitions, 7100 flow [2023-08-24 10:38:01,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 416 transitions, 6963 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-08-24 10:38:01,239 INFO L231 Difference]: Finished difference. Result has 245 places, 343 transitions, 6005 flow [2023-08-24 10:38:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=4804, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6005, PETRI_PLACES=245, PETRI_TRANSITIONS=343} [2023-08-24 10:38:01,240 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 224 predicate places. [2023-08-24 10:38:01,240 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 343 transitions, 6005 flow [2023-08-24 10:38:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:01,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:01,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:01,251 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 10:38:01,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:01,451 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 10:38:01,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2112803463, now seen corresponding path program 6 times [2023-08-24 10:38:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:01,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034589850] [2023-08-24 10:38:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:01,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:01,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034589850] [2023-08-24 10:38:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034589850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177190558] [2023-08-24 10:38:01,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:38:01,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:01,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:01,669 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 10:38:01,695 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 10:38:01,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:38:01,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:38:01,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:38:01,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:02,076 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:02,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 268 [2023-08-24 10:38:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:02,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:02,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:38:02,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:38:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:02,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177190558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:02,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:02,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 10:38:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754669067] [2023-08-24 10:38:02,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:02,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:38:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:38:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:38:02,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:38:02,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 343 transitions, 6005 flow. Second operand has 11 states, 11 states have (on average 155.0909090909091) internal successors, (1706), 11 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:02,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:02,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:38:02,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:03,881 INFO L124 PetriNetUnfolderBase]: 1230/2444 cut-off events. [2023-08-24 10:38:03,881 INFO L125 PetriNetUnfolderBase]: For 31882/31882 co-relation queries the response was YES. [2023-08-24 10:38:03,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18023 conditions, 2444 events. 1230/2444 cut-off events. For 31882/31882 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 16461 event pairs, 65 based on Foata normal form. 6/2449 useless extension candidates. Maximal degree in co-relation 17922. Up to 785 conditions per place. [2023-08-24 10:38:03,902 INFO L140 encePairwiseOnDemand]: 406/413 looper letters, 232 selfloop transitions, 236 changer transitions 0/468 dead transitions. [2023-08-24 10:38:03,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 468 transitions, 8506 flow [2023-08-24 10:38:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 10:38:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 10:38:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2246 transitions. [2023-08-24 10:38:03,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38844690418540295 [2023-08-24 10:38:03,905 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2246 transitions. [2023-08-24 10:38:03,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2246 transitions. [2023-08-24 10:38:03,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:03,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2246 transitions. [2023-08-24 10:38:03,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 160.42857142857142) internal successors, (2246), 14 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:03,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 413.0) internal successors, (6195), 15 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:03,912 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 413.0) internal successors, (6195), 15 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:03,912 INFO L175 Difference]: Start difference. First operand has 245 places, 343 transitions, 6005 flow. Second operand 14 states and 2246 transitions. [2023-08-24 10:38:03,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 468 transitions, 8506 flow [2023-08-24 10:38:04,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 468 transitions, 8081 flow, removed 101 selfloop flow, removed 9 redundant places. [2023-08-24 10:38:04,138 INFO L231 Difference]: Finished difference. Result has 256 places, 388 transitions, 7066 flow [2023-08-24 10:38:04,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7066, PETRI_PLACES=256, PETRI_TRANSITIONS=388} [2023-08-24 10:38:04,139 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-08-24 10:38:04,139 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 388 transitions, 7066 flow [2023-08-24 10:38:04,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.0909090909091) internal successors, (1706), 11 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:04,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:04,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:04,144 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 10:38:04,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:04,340 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 10:38:04,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash -929133749, now seen corresponding path program 7 times [2023-08-24 10:38:04,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:04,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134873801] [2023-08-24 10:38:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:04,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:04,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:04,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134873801] [2023-08-24 10:38:04,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134873801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:04,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082264119] [2023-08-24 10:38:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:38:04,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:04,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:04,521 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 10:38:04,547 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 10:38:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:04,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:38:04,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:04,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:04,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:38:05,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:38:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082264119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:05,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:05,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 10:38:05,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701579763] [2023-08-24 10:38:05,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:05,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:38:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:38:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:38:05,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:38:05,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 388 transitions, 7066 flow. Second operand has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:05,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:05,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:38:05,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:06,621 INFO L124 PetriNetUnfolderBase]: 1228/2448 cut-off events. [2023-08-24 10:38:06,621 INFO L125 PetriNetUnfolderBase]: For 34028/34028 co-relation queries the response was YES. [2023-08-24 10:38:06,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18546 conditions, 2448 events. 1228/2448 cut-off events. For 34028/34028 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16513 event pairs, 146 based on Foata normal form. 24/2471 useless extension candidates. Maximal degree in co-relation 18441. Up to 889 conditions per place. [2023-08-24 10:38:06,642 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 261 selfloop transitions, 185 changer transitions 0/446 dead transitions. [2023-08-24 10:38:06,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 446 transitions, 8365 flow [2023-08-24 10:38:06,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:38:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:38:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2545 transitions. [2023-08-24 10:38:06,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38513922518159804 [2023-08-24 10:38:06,647 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2545 transitions. [2023-08-24 10:38:06,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2545 transitions. [2023-08-24 10:38:06,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:06,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2545 transitions. [2023-08-24 10:38:06,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 159.0625) internal successors, (2545), 16 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:06,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:06,655 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 413.0) internal successors, (7021), 17 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:06,655 INFO L175 Difference]: Start difference. First operand has 256 places, 388 transitions, 7066 flow. Second operand 16 states and 2545 transitions. [2023-08-24 10:38:06,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 446 transitions, 8365 flow [2023-08-24 10:38:06,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 446 transitions, 8131 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-08-24 10:38:06,860 INFO L231 Difference]: Finished difference. Result has 267 places, 390 transitions, 7218 flow [2023-08-24 10:38:06,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7218, PETRI_PLACES=267, PETRI_TRANSITIONS=390} [2023-08-24 10:38:06,861 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-08-24 10:38:06,861 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 390 transitions, 7218 flow [2023-08-24 10:38:06,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.27272727272728) internal successors, (1708), 11 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:06,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:06,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:06,867 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 10:38:07,062 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,SelfDestructingSolverStorable22 [2023-08-24 10:38:07,062 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 10:38:07,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1632894163, now seen corresponding path program 8 times [2023-08-24 10:38:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:07,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797986822] [2023-08-24 10:38:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:07,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797986822] [2023-08-24 10:38:07,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797986822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822872590] [2023-08-24 10:38:07,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:38:07,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:07,361 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 10:38:07,381 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 10:38:07,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:38:07,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:38:07,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:38:07,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:07,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-24 10:38:07,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2023-08-24 10:38:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:07,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:07,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:38:07,975 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:38:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:08,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822872590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:08,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:08,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 10:38:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037838521] [2023-08-24 10:38:08,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:38:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:38:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:38:08,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:38:08,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 390 transitions, 7218 flow. Second operand has 12 states, 12 states have (on average 155.0) internal successors, (1860), 12 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:08,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:08,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:38:08,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:09,075 INFO L124 PetriNetUnfolderBase]: 1342/2636 cut-off events. [2023-08-24 10:38:09,075 INFO L125 PetriNetUnfolderBase]: For 39599/39599 co-relation queries the response was YES. [2023-08-24 10:38:09,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20465 conditions, 2636 events. 1342/2636 cut-off events. For 39599/39599 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17875 event pairs, 259 based on Foata normal form. 12/2647 useless extension candidates. Maximal degree in co-relation 20359. Up to 1604 conditions per place. [2023-08-24 10:38:09,099 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 280 selfloop transitions, 187 changer transitions 0/467 dead transitions. [2023-08-24 10:38:09,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 467 transitions, 9052 flow [2023-08-24 10:38:09,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 10:38:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 10:38:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2234 transitions. [2023-08-24 10:38:09,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38637149775164303 [2023-08-24 10:38:09,102 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2234 transitions. [2023-08-24 10:38:09,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2234 transitions. [2023-08-24 10:38:09,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:09,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2234 transitions. [2023-08-24 10:38:09,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 159.57142857142858) internal successors, (2234), 14 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:09,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 413.0) internal successors, (6195), 15 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:09,107 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 413.0) internal successors, (6195), 15 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:09,107 INFO L175 Difference]: Start difference. First operand has 267 places, 390 transitions, 7218 flow. Second operand 14 states and 2234 transitions. [2023-08-24 10:38:09,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 467 transitions, 9052 flow [2023-08-24 10:38:09,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 467 transitions, 8927 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-24 10:38:09,368 INFO L231 Difference]: Finished difference. Result has 274 places, 419 transitions, 8262 flow [2023-08-24 10:38:09,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=7062, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8262, PETRI_PLACES=274, PETRI_TRANSITIONS=419} [2023-08-24 10:38:09,368 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 253 predicate places. [2023-08-24 10:38:09,369 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 419 transitions, 8262 flow [2023-08-24 10:38:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.0) internal successors, (1860), 12 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:09,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:09,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:09,374 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 10:38:09,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:09,570 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 10:38:09,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:09,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2111263146, now seen corresponding path program 10 times [2023-08-24 10:38:09,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755392217] [2023-08-24 10:38:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:10,697 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 10:38:10,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:10,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755392217] [2023-08-24 10:38:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755392217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270880022] [2023-08-24 10:38:10,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:38:10,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:10,700 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 10:38:10,701 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 10:38:10,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:38:10,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:38:10,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 10:38:10,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:11,160 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 10:38:11,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 229 treesize of output 221 [2023-08-24 10:38:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:38:11,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:12,520 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 10:38:12,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2023-08-24 10:38:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:12,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270880022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:12,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:12,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-24 10:38:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856660488] [2023-08-24 10:38:12,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:12,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:38:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:38:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-24 10:38:12,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:38:12,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 419 transitions, 8262 flow. Second operand has 24 states, 24 states have (on average 101.04166666666667) internal successors, (2425), 24 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:12,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:12,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:38:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:15,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:38:19,317 INFO L124 PetriNetUnfolderBase]: 1746/3510 cut-off events. [2023-08-24 10:38:19,318 INFO L125 PetriNetUnfolderBase]: For 61977/61977 co-relation queries the response was YES. [2023-08-24 10:38:19,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28423 conditions, 3510 events. 1746/3510 cut-off events. For 61977/61977 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25593 event pairs, 37 based on Foata normal form. 6/3514 useless extension candidates. Maximal degree in co-relation 28271. Up to 822 conditions per place. [2023-08-24 10:38:19,352 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 199 selfloop transitions, 472 changer transitions 8/679 dead transitions. [2023-08-24 10:38:19,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 679 transitions, 13266 flow [2023-08-24 10:38:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 10:38:19,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 10:38:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3690 transitions. [2023-08-24 10:38:19,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25527499135247317 [2023-08-24 10:38:19,358 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3690 transitions. [2023-08-24 10:38:19,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3690 transitions. [2023-08-24 10:38:19,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:19,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3690 transitions. [2023-08-24 10:38:19,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 105.42857142857143) internal successors, (3690), 35 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:19,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 413.0) internal successors, (14868), 36 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:19,374 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 413.0) internal successors, (14868), 36 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:19,374 INFO L175 Difference]: Start difference. First operand has 274 places, 419 transitions, 8262 flow. Second operand 35 states and 3690 transitions. [2023-08-24 10:38:19,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 679 transitions, 13266 flow [2023-08-24 10:38:19,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 679 transitions, 12882 flow, removed 28 selfloop flow, removed 11 redundant places. [2023-08-24 10:38:19,876 INFO L231 Difference]: Finished difference. Result has 311 places, 573 transitions, 12740 flow [2023-08-24 10:38:19,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12740, PETRI_PLACES=311, PETRI_TRANSITIONS=573} [2023-08-24 10:38:19,877 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 290 predicate places. [2023-08-24 10:38:19,877 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 573 transitions, 12740 flow [2023-08-24 10:38:19,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.04166666666667) internal successors, (2425), 24 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:19,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:19,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:19,883 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 10:38:20,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:20,081 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 10:38:20,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:20,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1878091076, now seen corresponding path program 11 times [2023-08-24 10:38:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:20,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697074173] [2023-08-24 10:38:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:20,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:21,150 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 10:38:21,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:21,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697074173] [2023-08-24 10:38:21,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697074173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:21,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448558352] [2023-08-24 10:38:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:38:21,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:21,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:21,153 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 10:38:21,176 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 10:38:21,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:38:21,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:38:21,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 10:38:21,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:21,663 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:21,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-08-24 10:38:21,671 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 10:38:21,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:22,876 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-24 10:38:22,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 80 [2023-08-24 10:38:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:38:23,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448558352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:23,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:23,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-24 10:38:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340628677] [2023-08-24 10:38:23,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:23,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:38:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:38:23,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-08-24 10:38:23,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 413 [2023-08-24 10:38:23,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 573 transitions, 12740 flow. Second operand has 24 states, 24 states have (on average 107.58333333333333) internal successors, (2582), 24 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:23,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:23,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 413 [2023-08-24 10:38:23,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:26,283 INFO L124 PetriNetUnfolderBase]: 2182/4321 cut-off events. [2023-08-24 10:38:26,283 INFO L125 PetriNetUnfolderBase]: For 95126/95126 co-relation queries the response was YES. [2023-08-24 10:38:26,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39387 conditions, 4321 events. 2182/4321 cut-off events. For 95126/95126 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32460 event pairs, 100 based on Foata normal form. 7/4326 useless extension candidates. Maximal degree in co-relation 39221. Up to 2506 conditions per place. [2023-08-24 10:38:26,332 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 428 selfloop transitions, 401 changer transitions 20/849 dead transitions. [2023-08-24 10:38:26,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 849 transitions, 19406 flow [2023-08-24 10:38:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 10:38:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 10:38:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3490 transitions. [2023-08-24 10:38:26,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27259236116535185 [2023-08-24 10:38:26,338 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3490 transitions. [2023-08-24 10:38:26,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3490 transitions. [2023-08-24 10:38:26,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:26,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3490 transitions. [2023-08-24 10:38:26,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 112.58064516129032) internal successors, (3490), 31 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:26,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 413.0) internal successors, (13216), 32 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:26,455 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 413.0) internal successors, (13216), 32 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:26,455 INFO L175 Difference]: Start difference. First operand has 311 places, 573 transitions, 12740 flow. Second operand 31 states and 3490 transitions. [2023-08-24 10:38:26,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 849 transitions, 19406 flow [2023-08-24 10:38:27,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 849 transitions, 18543 flow, removed 421 selfloop flow, removed 4 redundant places. [2023-08-24 10:38:27,325 INFO L231 Difference]: Finished difference. Result has 352 places, 749 transitions, 17902 flow [2023-08-24 10:38:27,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=12201, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17902, PETRI_PLACES=352, PETRI_TRANSITIONS=749} [2023-08-24 10:38:27,326 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 331 predicate places. [2023-08-24 10:38:27,326 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 749 transitions, 17902 flow [2023-08-24 10:38:27,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.58333333333333) internal successors, (2582), 24 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:27,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:27,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:27,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-24 10:38:27,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:27,527 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 10:38:27,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash 177300376, now seen corresponding path program 9 times [2023-08-24 10:38:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:27,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023182065] [2023-08-24 10:38:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:27,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023182065] [2023-08-24 10:38:27,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023182065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:27,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078196215] [2023-08-24 10:38:27,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:38:27,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:27,729 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 10:38:27,755 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 10:38:27,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:38:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:38:27,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 10:38:27,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:28,129 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:28,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 283 treesize of output 268 [2023-08-24 10:38:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:28,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:28,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:38:28,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:38:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:29,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078196215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:29,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:29,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 10:38:29,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582271358] [2023-08-24 10:38:29,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:29,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 10:38:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:29,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 10:38:29,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-08-24 10:38:29,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:38:29,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 749 transitions, 17902 flow. Second operand has 14 states, 14 states have (on average 154.85714285714286) internal successors, (2168), 14 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:29,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:29,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:38:29,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:31,629 INFO L124 PetriNetUnfolderBase]: 2312/4534 cut-off events. [2023-08-24 10:38:31,630 INFO L125 PetriNetUnfolderBase]: For 108162/108162 co-relation queries the response was YES. [2023-08-24 10:38:31,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42847 conditions, 4534 events. 2312/4534 cut-off events. For 108162/108162 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 33993 event pairs, 495 based on Foata normal form. 16/4549 useless extension candidates. Maximal degree in co-relation 42599. Up to 2629 conditions per place. [2023-08-24 10:38:31,677 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 588 selfloop transitions, 289 changer transitions 0/877 dead transitions. [2023-08-24 10:38:31,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 877 transitions, 21228 flow [2023-08-24 10:38:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 10:38:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 10:38:31,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3519 transitions. [2023-08-24 10:38:31,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872991415364297 [2023-08-24 10:38:31,680 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3519 transitions. [2023-08-24 10:38:31,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3519 transitions. [2023-08-24 10:38:31,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:31,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3519 transitions. [2023-08-24 10:38:31,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 159.95454545454547) internal successors, (3519), 22 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:31,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:31,687 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 413.0) internal successors, (9499), 23 states have internal predecessors, (9499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:31,687 INFO L175 Difference]: Start difference. First operand has 352 places, 749 transitions, 17902 flow. Second operand 22 states and 3519 transitions. [2023-08-24 10:38:31,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 877 transitions, 21228 flow [2023-08-24 10:38:32,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 877 transitions, 20898 flow, removed 139 selfloop flow, removed 9 redundant places. [2023-08-24 10:38:32,632 INFO L231 Difference]: Finished difference. Result has 367 places, 794 transitions, 19396 flow [2023-08-24 10:38:32,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=17539, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=19396, PETRI_PLACES=367, PETRI_TRANSITIONS=794} [2023-08-24 10:38:32,633 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 346 predicate places. [2023-08-24 10:38:32,633 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 794 transitions, 19396 flow [2023-08-24 10:38:32,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.85714285714286) internal successors, (2168), 14 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:32,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:32,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:32,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-24 10:38:32,834 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,SelfDestructingSolverStorable26 [2023-08-24 10:38:32,834 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 10:38:32,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1577513904, now seen corresponding path program 12 times [2023-08-24 10:38:32,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:32,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405349774] [2023-08-24 10:38:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:32,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:33,671 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 10:38:33,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:33,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405349774] [2023-08-24 10:38:33,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405349774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:33,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349766898] [2023-08-24 10:38:33,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:38:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:33,672 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 10:38:33,674 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 10:38:33,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:38:33,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:38:33,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 10:38:33,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:34,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:34,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2023-08-24 10:38:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:38:34,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:34,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:34,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 168 [2023-08-24 10:38:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:38:36,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349766898] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:36,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:36,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2023-08-24 10:38:36,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223259984] [2023-08-24 10:38:36,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:36,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 10:38:36,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:36,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 10:38:36,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2023-08-24 10:38:36,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:38:36,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 794 transitions, 19396 flow. Second operand has 23 states, 23 states have (on average 100.82608695652173) internal successors, (2319), 23 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:36,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:36,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:38:36,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:41,122 INFO L124 PetriNetUnfolderBase]: 2415/4764 cut-off events. [2023-08-24 10:38:41,122 INFO L125 PetriNetUnfolderBase]: For 113763/113763 co-relation queries the response was YES. [2023-08-24 10:38:41,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45547 conditions, 4764 events. 2415/4764 cut-off events. For 113763/113763 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36394 event pairs, 51 based on Foata normal form. 11/4774 useless extension candidates. Maximal degree in co-relation 45281. Up to 1786 conditions per place. [2023-08-24 10:38:41,185 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 301 selfloop transitions, 592 changer transitions 15/908 dead transitions. [2023-08-24 10:38:41,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 908 transitions, 22769 flow [2023-08-24 10:38:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 10:38:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 10:38:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2717 transitions. [2023-08-24 10:38:41,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25302663438256656 [2023-08-24 10:38:41,188 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2717 transitions. [2023-08-24 10:38:41,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2717 transitions. [2023-08-24 10:38:41,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:41,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2717 transitions. [2023-08-24 10:38:41,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 104.5) internal successors, (2717), 26 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:41,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:41,199 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 413.0) internal successors, (11151), 27 states have internal predecessors, (11151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:41,199 INFO L175 Difference]: Start difference. First operand has 367 places, 794 transitions, 19396 flow. Second operand 26 states and 2717 transitions. [2023-08-24 10:38:41,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 908 transitions, 22769 flow [2023-08-24 10:38:42,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 908 transitions, 22461 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-08-24 10:38:42,566 INFO L231 Difference]: Finished difference. Result has 392 places, 837 transitions, 21936 flow [2023-08-24 10:38:42,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=19061, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=21936, PETRI_PLACES=392, PETRI_TRANSITIONS=837} [2023-08-24 10:38:42,567 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 371 predicate places. [2023-08-24 10:38:42,567 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 837 transitions, 21936 flow [2023-08-24 10:38:42,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 100.82608695652173) internal successors, (2319), 23 states have internal predecessors, (2319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:42,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:42,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:42,573 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 10:38:42,770 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,SelfDestructingSolverStorable27 [2023-08-24 10:38:42,771 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 10:38:42,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1915842678, now seen corresponding path program 13 times [2023-08-24 10:38:42,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:42,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313327976] [2023-08-24 10:38:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:43,433 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 10:38:43,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313327976] [2023-08-24 10:38:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313327976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:43,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315938098] [2023-08-24 10:38:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:38:43,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:43,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:43,437 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 10:38:43,466 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 10:38:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:43,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 10:38:43,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:43,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:38:43,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:38:43,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:38:43,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:38:44,058 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 10:38:44,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 195 [2023-08-24 10:38:44,111 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 10:38:44,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:46,557 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:46,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 288 treesize of output 153 [2023-08-24 10:38:46,612 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-24 10:38:46,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 882 treesize of output 829 [2023-08-24 10:38:46,681 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 10:38:46,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 178 [2023-08-24 10:38:47,234 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 10:38:47,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 173 [2023-08-24 10:38:47,395 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 10:38:47,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315938098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:47,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:47,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-08-24 10:38:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291195198] [2023-08-24 10:38:47,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 10:38:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:47,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 10:38:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=618, Unknown=3, NotChecked=0, Total=812 [2023-08-24 10:38:47,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:38:47,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 837 transitions, 21936 flow. Second operand has 29 states, 29 states have (on average 100.58620689655173) internal successors, (2917), 29 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:47,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:47,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:38:47,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:54,970 WARN L234 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:39:01,974 INFO L124 PetriNetUnfolderBase]: 2516/4977 cut-off events. [2023-08-24 10:39:01,974 INFO L125 PetriNetUnfolderBase]: For 149895/149895 co-relation queries the response was YES. [2023-08-24 10:39:02,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50831 conditions, 4977 events. 2516/4977 cut-off events. For 149895/149895 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 38529 event pairs, 106 based on Foata normal form. 7/4983 useless extension candidates. Maximal degree in co-relation 50573. Up to 2174 conditions per place. [2023-08-24 10:39:02,033 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 353 selfloop transitions, 603 changer transitions 16/972 dead transitions. [2023-08-24 10:39:02,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 972 transitions, 25724 flow [2023-08-24 10:39:02,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 10:39:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 10:39:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3155 transitions. [2023-08-24 10:39:02,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2546408393866021 [2023-08-24 10:39:02,036 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3155 transitions. [2023-08-24 10:39:02,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3155 transitions. [2023-08-24 10:39:02,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:02,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3155 transitions. [2023-08-24 10:39:02,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 105.16666666666667) internal successors, (3155), 30 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:02,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:02,045 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 413.0) internal successors, (12803), 31 states have internal predecessors, (12803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:02,046 INFO L175 Difference]: Start difference. First operand has 392 places, 837 transitions, 21936 flow. Second operand 30 states and 3155 transitions. [2023-08-24 10:39:02,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 972 transitions, 25724 flow [2023-08-24 10:39:03,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 972 transitions, 25004 flow, removed 124 selfloop flow, removed 17 redundant places. [2023-08-24 10:39:03,487 INFO L231 Difference]: Finished difference. Result has 408 places, 883 transitions, 24588 flow [2023-08-24 10:39:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=21320, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=24588, PETRI_PLACES=408, PETRI_TRANSITIONS=883} [2023-08-24 10:39:03,488 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2023-08-24 10:39:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 883 transitions, 24588 flow [2023-08-24 10:39:03,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 100.58620689655173) internal successors, (2917), 29 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:03,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:03,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:03,493 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 10:39:03,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 10:39:03,693 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 10:39:03,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash -508525832, now seen corresponding path program 14 times [2023-08-24 10:39:03,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928588482] [2023-08-24 10:39:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:04,245 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 10:39:04,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:04,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928588482] [2023-08-24 10:39:04,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928588482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:04,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986718411] [2023-08-24 10:39:04,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:39:04,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:04,247 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 10:39:04,248 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 10:39:04,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:39:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:04,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 10:39:04,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:04,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:39:04,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:39:04,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:39:04,874 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:04,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-08-24 10:39:04,899 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 10:39:04,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:06,762 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:06,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 140 [2023-08-24 10:39:06,817 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-24 10:39:06,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 414 treesize of output 425 [2023-08-24 10:39:06,885 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 10:39:06,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 326 [2023-08-24 10:39:06,959 INFO L322 Elim1Store]: treesize reduction 8, result has 87.7 percent of original size [2023-08-24 10:39:06,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 173 [2023-08-24 10:39:08,389 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 10:39:08,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986718411] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:08,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:08,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 28 [2023-08-24 10:39:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915116601] [2023-08-24 10:39:08,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:08,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 10:39:08,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 10:39:08,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=680, Unknown=2, NotChecked=0, Total=870 [2023-08-24 10:39:08,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:39:08,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 883 transitions, 24588 flow. Second operand has 30 states, 30 states have (on average 100.5) internal successors, (3015), 30 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:08,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:08,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:39:08,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:18,121 INFO L124 PetriNetUnfolderBase]: 2534/5025 cut-off events. [2023-08-24 10:39:18,121 INFO L125 PetriNetUnfolderBase]: For 164903/164903 co-relation queries the response was YES. [2023-08-24 10:39:18,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53399 conditions, 5025 events. 2534/5025 cut-off events. For 164903/164903 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 39055 event pairs, 156 based on Foata normal form. 6/5030 useless extension candidates. Maximal degree in co-relation 53132. Up to 2758 conditions per place. [2023-08-24 10:39:18,180 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 587 selfloop transitions, 371 changer transitions 19/977 dead transitions. [2023-08-24 10:39:18,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 977 transitions, 27406 flow [2023-08-24 10:39:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 10:39:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 10:39:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3342 transitions. [2023-08-24 10:39:18,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2528753026634383 [2023-08-24 10:39:18,183 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3342 transitions. [2023-08-24 10:39:18,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3342 transitions. [2023-08-24 10:39:18,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:18,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3342 transitions. [2023-08-24 10:39:18,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 104.4375) internal successors, (3342), 32 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 413.0) internal successors, (13629), 33 states have internal predecessors, (13629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,194 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 413.0) internal successors, (13629), 33 states have internal predecessors, (13629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,194 INFO L175 Difference]: Start difference. First operand has 408 places, 883 transitions, 24588 flow. Second operand 32 states and 3342 transitions. [2023-08-24 10:39:18,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 977 transitions, 27406 flow [2023-08-24 10:39:20,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 977 transitions, 27186 flow, removed 78 selfloop flow, removed 12 redundant places. [2023-08-24 10:39:20,067 INFO L231 Difference]: Finished difference. Result has 435 places, 899 transitions, 26125 flow [2023-08-24 10:39:20,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=24374, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=26125, PETRI_PLACES=435, PETRI_TRANSITIONS=899} [2023-08-24 10:39:20,069 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 414 predicate places. [2023-08-24 10:39:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 899 transitions, 26125 flow [2023-08-24 10:39:20,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.5) internal successors, (3015), 30 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:20,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:20,070 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:20,078 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 10:39:20,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:20,276 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 10:39:20,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:20,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1664640734, now seen corresponding path program 10 times [2023-08-24 10:39:20,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:20,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278726286] [2023-08-24 10:39:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:20,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:20,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278726286] [2023-08-24 10:39:20,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278726286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5769604] [2023-08-24 10:39:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:39:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:20,472 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 10:39:20,473 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 10:39:20,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:39:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:20,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 10:39:20,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:20,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:20,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:39:21,020 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:39:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5769604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:21,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:21,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 10:39:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718959400] [2023-08-24 10:39:21,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 10:39:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 10:39:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-08-24 10:39:21,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:39:21,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 899 transitions, 26125 flow. Second operand has 14 states, 14 states have (on average 155.14285714285714) internal successors, (2172), 14 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:21,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:21,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:39:21,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:24,870 INFO L124 PetriNetUnfolderBase]: 2682/5301 cut-off events. [2023-08-24 10:39:24,871 INFO L125 PetriNetUnfolderBase]: For 194738/194738 co-relation queries the response was YES. [2023-08-24 10:39:24,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58668 conditions, 5301 events. 2682/5301 cut-off events. For 194738/194738 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 41513 event pairs, 235 based on Foata normal form. 44/5344 useless extension candidates. Maximal degree in co-relation 58331. Up to 1757 conditions per place. [2023-08-24 10:39:24,941 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 454 selfloop transitions, 590 changer transitions 0/1044 dead transitions. [2023-08-24 10:39:24,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1044 transitions, 30499 flow [2023-08-24 10:39:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 10:39:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 10:39:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3978 transitions. [2023-08-24 10:39:24,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38527845036319613 [2023-08-24 10:39:24,944 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3978 transitions. [2023-08-24 10:39:24,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3978 transitions. [2023-08-24 10:39:24,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:24,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3978 transitions. [2023-08-24 10:39:24,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 159.12) internal successors, (3978), 25 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:24,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 413.0) internal successors, (10738), 26 states have internal predecessors, (10738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:24,954 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 413.0) internal successors, (10738), 26 states have internal predecessors, (10738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:24,954 INFO L175 Difference]: Start difference. First operand has 435 places, 899 transitions, 26125 flow. Second operand 25 states and 3978 transitions. [2023-08-24 10:39:24,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1044 transitions, 30499 flow [2023-08-24 10:39:27,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1044 transitions, 30329 flow, removed 44 selfloop flow, removed 10 redundant places. [2023-08-24 10:39:27,126 INFO L231 Difference]: Finished difference. Result has 451 places, 956 transitions, 29299 flow [2023-08-24 10:39:27,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=25871, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29299, PETRI_PLACES=451, PETRI_TRANSITIONS=956} [2023-08-24 10:39:27,128 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 430 predicate places. [2023-08-24 10:39:27,128 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 956 transitions, 29299 flow [2023-08-24 10:39:27,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 155.14285714285714) internal successors, (2172), 14 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:27,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:27,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:27,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 10:39:27,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:27,334 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 10:39:27,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1620846678, now seen corresponding path program 11 times [2023-08-24 10:39:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35476893] [2023-08-24 10:39:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:27,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35476893] [2023-08-24 10:39:27,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35476893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263407431] [2023-08-24 10:39:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:39:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:27,696 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 10:39:27,697 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 10:39:27,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:39:27,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:27,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 10:39:27,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:28,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:28,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:39:28,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:39:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:28,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263407431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:28,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:28,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 10:39:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713075833] [2023-08-24 10:39:28,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 10:39:28,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 10:39:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-24 10:39:28,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:39:28,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 956 transitions, 29299 flow. Second operand has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:28,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:28,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:39:28,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:33,067 INFO L124 PetriNetUnfolderBase]: 2865/5626 cut-off events. [2023-08-24 10:39:33,067 INFO L125 PetriNetUnfolderBase]: For 227457/227457 co-relation queries the response was YES. [2023-08-24 10:39:33,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64535 conditions, 5626 events. 2865/5626 cut-off events. For 227457/227457 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 44450 event pairs, 89 based on Foata normal form. 32/5657 useless extension candidates. Maximal degree in co-relation 64201. Up to 1582 conditions per place. [2023-08-24 10:39:33,146 INFO L140 encePairwiseOnDemand]: 406/413 looper letters, 520 selfloop transitions, 635 changer transitions 0/1155 dead transitions. [2023-08-24 10:39:33,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1155 transitions, 35236 flow [2023-08-24 10:39:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 10:39:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 10:39:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4619 transitions. [2023-08-24 10:39:33,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38565584036069134 [2023-08-24 10:39:33,150 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4619 transitions. [2023-08-24 10:39:33,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4619 transitions. [2023-08-24 10:39:33,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:33,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4619 transitions. [2023-08-24 10:39:33,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 159.27586206896552) internal successors, (4619), 29 states have internal predecessors, (4619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 413.0) internal successors, (12390), 30 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,159 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 413.0) internal successors, (12390), 30 states have internal predecessors, (12390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,159 INFO L175 Difference]: Start difference. First operand has 451 places, 956 transitions, 29299 flow. Second operand 29 states and 4619 transitions. [2023-08-24 10:39:33,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1155 transitions, 35236 flow [2023-08-24 10:39:35,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1155 transitions, 34576 flow, removed 127 selfloop flow, removed 14 redundant places. [2023-08-24 10:39:35,545 INFO L231 Difference]: Finished difference. Result has 473 places, 1014 transitions, 32494 flow [2023-08-24 10:39:35,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=28591, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=580, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=32494, PETRI_PLACES=473, PETRI_TRANSITIONS=1014} [2023-08-24 10:39:35,546 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 452 predicate places. [2023-08-24 10:39:35,546 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 1014 transitions, 32494 flow [2023-08-24 10:39:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 154.92307692307693) internal successors, (2014), 13 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:35,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:35,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:35,553 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 10:39:35,747 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,SelfDestructingSolverStorable31 [2023-08-24 10:39:35,747 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 10:39:35,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1267880478, now seen corresponding path program 12 times [2023-08-24 10:39:35,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:35,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725448782] [2023-08-24 10:39:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725448782] [2023-08-24 10:39:36,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725448782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:36,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904849558] [2023-08-24 10:39:36,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:39:36,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:36,021 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 10:39:36,058 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 10:39:36,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:39:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:36,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 10:39:36,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:36,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:36,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:39:36,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:39:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:39:36,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904849558] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:36,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:36,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 10:39:36,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569381305] [2023-08-24 10:39:36,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:36,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 10:39:36,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:36,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 10:39:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-08-24 10:39:36,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:39:36,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 1014 transitions, 32494 flow. Second operand has 15 states, 15 states have (on average 154.93333333333334) internal successors, (2324), 15 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:36,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:36,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:39:36,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:40,318 INFO L124 PetriNetUnfolderBase]: 3221/6422 cut-off events. [2023-08-24 10:39:40,318 INFO L125 PetriNetUnfolderBase]: For 283192/283192 co-relation queries the response was YES. [2023-08-24 10:39:40,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75614 conditions, 6422 events. 3221/6422 cut-off events. For 283192/283192 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 51971 event pairs, 70 based on Foata normal form. 24/6445 useless extension candidates. Maximal degree in co-relation 75273. Up to 1539 conditions per place. [2023-08-24 10:39:40,404 INFO L140 encePairwiseOnDemand]: 406/413 looper letters, 563 selfloop transitions, 706 changer transitions 0/1269 dead transitions. [2023-08-24 10:39:40,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1269 transitions, 40849 flow [2023-08-24 10:39:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 10:39:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 10:39:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4297 transitions. [2023-08-24 10:39:40,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38534660568558876 [2023-08-24 10:39:40,407 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4297 transitions. [2023-08-24 10:39:40,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4297 transitions. [2023-08-24 10:39:40,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:40,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4297 transitions. [2023-08-24 10:39:40,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 159.14814814814815) internal successors, (4297), 27 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:40,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:40,415 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:40,415 INFO L175 Difference]: Start difference. First operand has 473 places, 1014 transitions, 32494 flow. Second operand 27 states and 4297 transitions. [2023-08-24 10:39:40,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1269 transitions, 40849 flow [2023-08-24 10:39:43,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1269 transitions, 39874 flow, removed 196 selfloop flow, removed 11 redundant places. [2023-08-24 10:39:43,226 INFO L231 Difference]: Finished difference. Result has 496 places, 1114 transitions, 36823 flow [2023-08-24 10:39:43,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=31442, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=36823, PETRI_PLACES=496, PETRI_TRANSITIONS=1114} [2023-08-24 10:39:43,228 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 475 predicate places. [2023-08-24 10:39:43,228 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 1114 transitions, 36823 flow [2023-08-24 10:39:43,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 154.93333333333334) internal successors, (2324), 15 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:43,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:43,228 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:43,233 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 10:39:43,428 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,SelfDestructingSolverStorable32 [2023-08-24 10:39:43,429 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 10:39:43,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:43,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2023159440, now seen corresponding path program 15 times [2023-08-24 10:39:43,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:43,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829455495] [2023-08-24 10:39:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:43,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:44,529 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 10:39:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829455495] [2023-08-24 10:39:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829455495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892775473] [2023-08-24 10:39:44,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:39:44,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:44,531 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 10:39:44,533 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 10:39:44,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:39:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:44,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 10:39:44,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:44,736 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-24 10:39:44,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:39:44,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:39:44,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-24 10:39:45,152 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 10:39:45,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 225 [2023-08-24 10:39:45,218 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 10:39:45,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:46,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:46,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 100 [2023-08-24 10:39:46,535 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:46,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 444 treesize of output 412 [2023-08-24 10:39:46,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:46,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 220 treesize of output 192 [2023-08-24 10:39:46,591 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:46,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-08-24 10:39:47,445 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:39:47,558 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 10:39:47,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892775473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:47,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:47,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 10:39:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29248841] [2023-08-24 10:39:47,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 10:39:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 10:39:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=743, Unknown=1, NotChecked=0, Total=870 [2023-08-24 10:39:47,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:39:47,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 1114 transitions, 36823 flow. Second operand has 30 states, 30 states have (on average 100.66666666666667) internal successors, (3020), 30 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:47,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:47,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:39:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:49,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:39:53,029 WARN L539 Checker$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 10:39:55,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:40:04,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:40:07,475 INFO L124 PetriNetUnfolderBase]: 3716/7402 cut-off events. [2023-08-24 10:40:07,475 INFO L125 PetriNetUnfolderBase]: For 362612/362612 co-relation queries the response was YES. [2023-08-24 10:40:07,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90379 conditions, 7402 events. 3716/7402 cut-off events. For 362612/362612 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 61428 event pairs, 191 based on Foata normal form. 23/7421 useless extension candidates. Maximal degree in co-relation 90030. Up to 3734 conditions per place. [2023-08-24 10:40:07,582 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 733 selfloop transitions, 672 changer transitions 27/1432 dead transitions. [2023-08-24 10:40:07,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1432 transitions, 47265 flow [2023-08-24 10:40:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 10:40:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 10:40:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3386 transitions. [2023-08-24 10:40:07,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2562046004842615 [2023-08-24 10:40:07,586 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3386 transitions. [2023-08-24 10:40:07,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3386 transitions. [2023-08-24 10:40:07,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:40:07,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3386 transitions. [2023-08-24 10:40:07,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 105.8125) internal successors, (3386), 32 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:07,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 413.0) internal successors, (13629), 33 states have internal predecessors, (13629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:07,596 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 413.0) internal successors, (13629), 33 states have internal predecessors, (13629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:07,596 INFO L175 Difference]: Start difference. First operand has 496 places, 1114 transitions, 36823 flow. Second operand 32 states and 3386 transitions. [2023-08-24 10:40:07,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1432 transitions, 47265 flow [2023-08-24 10:40:11,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1432 transitions, 45901 flow, removed 246 selfloop flow, removed 7 redundant places. [2023-08-24 10:40:11,640 INFO L231 Difference]: Finished difference. Result has 536 places, 1275 transitions, 43425 flow [2023-08-24 10:40:11,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=35673, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=43425, PETRI_PLACES=536, PETRI_TRANSITIONS=1275} [2023-08-24 10:40:11,641 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 515 predicate places. [2023-08-24 10:40:11,641 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1275 transitions, 43425 flow [2023-08-24 10:40:11,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.66666666666667) internal successors, (3020), 30 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:11,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:40:11,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:40:11,647 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 10:40:11,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:40:11,842 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 10:40:11,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:40:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 5103602, now seen corresponding path program 16 times [2023-08-24 10:40:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:40:11,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535106319] [2023-08-24 10:40:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:40:11,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:40:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:40:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:40:12,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:40:12,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535106319] [2023-08-24 10:40:12,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535106319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:40:12,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659020519] [2023-08-24 10:40:12,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:40:12,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:40:12,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:40:12,257 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 10:40:12,287 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 10:40:12,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:40:12,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:40:12,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 10:40:12,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:40:12,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:40:12,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 10:40:12,877 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 10:40:12,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 225 [2023-08-24 10:40:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:40:12,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:40:13,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:40:13,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 135 [2023-08-24 10:40:13,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:40:13,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2023-08-24 10:40:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:40:14,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659020519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:40:14,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:40:14,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 22 [2023-08-24 10:40:14,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989300418] [2023-08-24 10:40:14,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:40:14,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:40:14,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:40:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:40:14,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=454, Unknown=1, NotChecked=0, Total=552 [2023-08-24 10:40:14,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 413 [2023-08-24 10:40:14,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1275 transitions, 43425 flow. Second operand has 24 states, 24 states have (on average 111.70833333333333) internal successors, (2681), 24 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:14,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:40:14,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 413 [2023-08-24 10:40:14,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:40:26,965 WARN L234 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:40:35,391 WARN L234 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 77 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:40:50,040 WARN L234 SmtUtils]: Spent 14.26s on a formula simplification. DAG size of input: 89 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:41:01,733 INFO L124 PetriNetUnfolderBase]: 3720/7390 cut-off events. [2023-08-24 10:41:01,734 INFO L125 PetriNetUnfolderBase]: For 378317/378317 co-relation queries the response was YES. [2023-08-24 10:41:01,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92384 conditions, 7390 events. 3720/7390 cut-off events. For 378317/378317 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 60997 event pairs, 59 based on Foata normal form. 8/7397 useless extension candidates. Maximal degree in co-relation 92075. Up to 1877 conditions per place. [2023-08-24 10:41:01,845 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 307 selfloop transitions, 1076 changer transitions 14/1397 dead transitions. [2023-08-24 10:41:01,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1397 transitions, 47935 flow [2023-08-24 10:41:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 10:41:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 10:41:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3143 transitions. [2023-08-24 10:41:01,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28185812931575643 [2023-08-24 10:41:01,848 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3143 transitions. [2023-08-24 10:41:01,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3143 transitions. [2023-08-24 10:41:01,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:41:01,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3143 transitions. [2023-08-24 10:41:01,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 116.4074074074074) internal successors, (3143), 27 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:01,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:01,856 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 413.0) internal successors, (11564), 28 states have internal predecessors, (11564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:01,856 INFO L175 Difference]: Start difference. First operand has 536 places, 1275 transitions, 43425 flow. Second operand 27 states and 3143 transitions. [2023-08-24 10:41:01,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1397 transitions, 47935 flow [2023-08-24 10:41:06,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 1397 transitions, 47030 flow, removed 156 selfloop flow, removed 12 redundant places. [2023-08-24 10:41:06,626 INFO L231 Difference]: Finished difference. Result has 558 places, 1310 transitions, 46383 flow [2023-08-24 10:41:06,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=42566, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=46383, PETRI_PLACES=558, PETRI_TRANSITIONS=1310} [2023-08-24 10:41:06,628 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 537 predicate places. [2023-08-24 10:41:06,628 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1310 transitions, 46383 flow [2023-08-24 10:41:06,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 111.70833333333333) internal successors, (2681), 24 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:06,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:41:06,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:41:06,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 10:41:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:41:06,833 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 10:41:06,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:41:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -856149512, now seen corresponding path program 17 times [2023-08-24 10:41:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:41:06,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639133562] [2023-08-24 10:41:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:41:06,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:41:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:41:07,775 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 10:41:07,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:41:07,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639133562] [2023-08-24 10:41:07,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639133562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:41:07,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194595424] [2023-08-24 10:41:07,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:41:07,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:41:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:41:07,777 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 10:41:07,778 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 10:41:07,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:41:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:41:07,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 10:41:07,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:41:08,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:41:08,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 10:41:08,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:08,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 26 [2023-08-24 10:41:08,416 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 10:41:08,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:41:09,196 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:09,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 162 [2023-08-24 10:41:09,217 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:09,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2023-08-24 10:41:09,717 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 10:41:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194595424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:41:09,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:41:09,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 10:41:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654133843] [2023-08-24 10:41:09,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:41:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 10:41:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:41:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 10:41:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=743, Unknown=1, NotChecked=0, Total=870 [2023-08-24 10:41:09,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:41:09,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1310 transitions, 46383 flow. Second operand has 30 states, 30 states have (on average 100.46666666666667) internal successors, (3014), 30 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:09,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:41:09,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:41:09,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:41:14,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:41:23,668 WARN L234 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:41:29,900 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:41:46,908 WARN L234 SmtUtils]: Spent 16.61s on a formula simplification. DAG size of input: 83 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:42:00,232 WARN L234 SmtUtils]: Spent 10.41s on a formula simplification. DAG size of input: 73 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:42:02,270 WARN L539 Checker$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 10:42:13,060 WARN L234 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 70 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:42:17,272 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 10:42:21,571 INFO L124 PetriNetUnfolderBase]: 3806/7527 cut-off events. [2023-08-24 10:42:21,571 INFO L125 PetriNetUnfolderBase]: For 407441/407441 co-relation queries the response was YES. [2023-08-24 10:42:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98480 conditions, 7527 events. 3806/7527 cut-off events. For 407441/407441 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 61952 event pairs, 128 based on Foata normal form. 10/7536 useless extension candidates. Maximal degree in co-relation 98152. Up to 1854 conditions per place. [2023-08-24 10:42:21,696 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 333 selfloop transitions, 1128 changer transitions 12/1473 dead transitions. [2023-08-24 10:42:21,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 598 places, 1473 transitions, 52032 flow [2023-08-24 10:42:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 10:42:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 10:42:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4397 transitions. [2023-08-24 10:42:21,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.253487835812291 [2023-08-24 10:42:21,700 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4397 transitions. [2023-08-24 10:42:21,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4397 transitions. [2023-08-24 10:42:21,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:21,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4397 transitions. [2023-08-24 10:42:21,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 104.69047619047619) internal successors, (4397), 42 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:21,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 413.0) internal successors, (17759), 43 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:21,710 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 413.0) internal successors, (17759), 43 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:21,711 INFO L175 Difference]: Start difference. First operand has 558 places, 1310 transitions, 46383 flow. Second operand 42 states and 4397 transitions. [2023-08-24 10:42:21,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 598 places, 1473 transitions, 52032 flow [2023-08-24 10:42:26,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 1473 transitions, 51440 flow, removed 221 selfloop flow, removed 8 redundant places. [2023-08-24 10:42:26,732 INFO L231 Difference]: Finished difference. Result has 596 places, 1362 transitions, 51029 flow [2023-08-24 10:42:26,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=45892, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=51029, PETRI_PLACES=596, PETRI_TRANSITIONS=1362} [2023-08-24 10:42:26,733 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 575 predicate places. [2023-08-24 10:42:26,734 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1362 transitions, 51029 flow [2023-08-24 10:42:26,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.46666666666667) internal successors, (3014), 30 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:26,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:26,734 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:26,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-24 10:42:26,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:26,943 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 10:42:26,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1018629259, now seen corresponding path program 18 times [2023-08-24 10:42:26,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:26,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076136250] [2023-08-24 10:42:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:26,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:42:28,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076136250] [2023-08-24 10:42:28,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076136250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:28,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927884429] [2023-08-24 10:42:28,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:42:28,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:28,405 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 10:42:28,409 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 10:42:28,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 10:42:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:28,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-24 10:42:28,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:28,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:42:28,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 10:42:28,906 INFO L322 Elim1Store]: treesize reduction 15, result has 44.4 percent of original size [2023-08-24 10:42:28,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 225 [2023-08-24 10:42:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:42:28,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:31,980 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:42:31,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 135 [2023-08-24 10:42:31,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:42:31,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2023-08-24 10:42:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:42:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927884429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:32,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:32,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-08-24 10:42:32,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001609555] [2023-08-24 10:42:32,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:32,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 10:42:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 10:42:32,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=611, Unknown=1, NotChecked=0, Total=702 [2023-08-24 10:42:32,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:42:32,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1362 transitions, 51029 flow. Second operand has 27 states, 27 states have (on average 100.88888888888889) internal successors, (2724), 27 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:32,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:32,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:42:32,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:37,382 INFO L124 PetriNetUnfolderBase]: 4048/7929 cut-off events. [2023-08-24 10:42:37,383 INFO L125 PetriNetUnfolderBase]: For 493942/493942 co-relation queries the response was YES. [2023-08-24 10:42:37,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109172 conditions, 7929 events. 4048/7929 cut-off events. For 493942/493942 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 64897 event pairs, 477 based on Foata normal form. 3/7932 useless extension candidates. Maximal degree in co-relation 108838. Up to 6717 conditions per place. [2023-08-24 10:42:37,506 INFO L140 encePairwiseOnDemand]: 403/413 looper letters, 1242 selfloop transitions, 301 changer transitions 8/1551 dead transitions. [2023-08-24 10:42:37,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 1551 transitions, 59584 flow [2023-08-24 10:42:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 10:42:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 10:42:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1904 transitions. [2023-08-24 10:42:37,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.256120527306968 [2023-08-24 10:42:37,508 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1904 transitions. [2023-08-24 10:42:37,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1904 transitions. [2023-08-24 10:42:37,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:37,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1904 transitions. [2023-08-24 10:42:37,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 105.77777777777777) internal successors, (1904), 18 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:37,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 413.0) internal successors, (7847), 19 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:37,514 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 413.0) internal successors, (7847), 19 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:37,514 INFO L175 Difference]: Start difference. First operand has 596 places, 1362 transitions, 51029 flow. Second operand 18 states and 1904 transitions. [2023-08-24 10:42:37,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 1551 transitions, 59584 flow [2023-08-24 10:42:43,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1551 transitions, 59237 flow, removed 113 selfloop flow, removed 14 redundant places. [2023-08-24 10:42:43,759 INFO L231 Difference]: Finished difference. Result has 602 places, 1452 transitions, 54962 flow [2023-08-24 10:42:43,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=50698, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=54962, PETRI_PLACES=602, PETRI_TRANSITIONS=1452} [2023-08-24 10:42:43,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 581 predicate places. [2023-08-24 10:42:43,760 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 1452 transitions, 54962 flow [2023-08-24 10:42:43,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 100.88888888888889) internal successors, (2724), 27 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:43,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:43,761 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:43,766 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 10:42:43,961 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,SelfDestructingSolverStorable36 [2023-08-24 10:42:43,961 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 10:42:43,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash -771858679, now seen corresponding path program 1 times [2023-08-24 10:42:43,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:43,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736814967] [2023-08-24 10:42:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:43,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:42:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736814967] [2023-08-24 10:42:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736814967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471083969] [2023-08-24 10:42:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:44,117 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 10:42:44,123 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 10:42:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:44,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 10:42:44,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:42:44,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:42:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471083969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:44,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:44,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 10:42:44,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795628391] [2023-08-24 10:42:44,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:44,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:42:44,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:44,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:42:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:42:44,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:42:44,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 1452 transitions, 54962 flow. Second operand has 12 states, 12 states have (on average 155.16666666666666) internal successors, (1862), 12 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:44,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:42:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:50,103 INFO L124 PetriNetUnfolderBase]: 3693/7434 cut-off events. [2023-08-24 10:42:50,103 INFO L125 PetriNetUnfolderBase]: For 498410/498410 co-relation queries the response was YES. [2023-08-24 10:42:50,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100539 conditions, 7434 events. 3693/7434 cut-off events. For 498410/498410 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 62120 event pairs, 468 based on Foata normal form. 240/7674 useless extension candidates. Maximal degree in co-relation 100189. Up to 1594 conditions per place. [2023-08-24 10:42:50,216 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 888 selfloop transitions, 597 changer transitions 49/1534 dead transitions. [2023-08-24 10:42:50,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1534 transitions, 58902 flow [2023-08-24 10:42:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 10:42:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 10:42:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1766 transitions. [2023-08-24 10:42:50,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38872991415364294 [2023-08-24 10:42:50,218 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1766 transitions. [2023-08-24 10:42:50,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1766 transitions. [2023-08-24 10:42:50,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:50,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1766 transitions. [2023-08-24 10:42:50,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 160.54545454545453) internal successors, (1766), 11 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 413.0) internal successors, (4956), 12 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,221 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 413.0) internal successors, (4956), 12 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,221 INFO L175 Difference]: Start difference. First operand has 602 places, 1452 transitions, 54962 flow. Second operand 11 states and 1766 transitions. [2023-08-24 10:42:50,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1534 transitions, 58902 flow [2023-08-24 10:42:56,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 1534 transitions, 58136 flow, removed 89 selfloop flow, removed 7 redundant places. [2023-08-24 10:42:56,084 INFO L231 Difference]: Finished difference. Result has 610 places, 1429 transitions, 54651 flow [2023-08-24 10:42:56,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=51941, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=54651, PETRI_PLACES=610, PETRI_TRANSITIONS=1429} [2023-08-24 10:42:56,085 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 589 predicate places. [2023-08-24 10:42:56,085 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 1429 transitions, 54651 flow [2023-08-24 10:42:56,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.16666666666666) internal successors, (1862), 12 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:56,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:56,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:56,093 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 10:42:56,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 10:42:56,286 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 10:42:56,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -660165370, now seen corresponding path program 2 times [2023-08-24 10:42:56,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:56,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864916805] [2023-08-24 10:42:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:42:56,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:56,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864916805] [2023-08-24 10:42:56,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864916805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:56,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351997098] [2023-08-24 10:42:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:42:56,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:56,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:56,521 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 10:42:56,522 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 10:42:56,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:42:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:56,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 10:42:56,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:56,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:42:56,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:42:56,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:42:57,322 INFO L322 Elim1Store]: treesize reduction 236, result has 0.4 percent of original size [2023-08-24 10:42:57,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 693 treesize of output 265 [2023-08-24 10:42:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:42:57,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:43:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:01,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351997098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:43:01,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:43:01,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-08-24 10:43:01,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856860681] [2023-08-24 10:43:01,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:43:01,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 10:43:01,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:43:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 10:43:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-08-24 10:43:01,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:43:01,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 1429 transitions, 54651 flow. Second operand has 26 states, 26 states have (on average 100.76923076923077) internal successors, (2620), 26 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:01,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:43:01,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:43:01,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:43:23,906 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 [] [2023-08-24 10:43:33,819 INFO L124 PetriNetUnfolderBase]: 3748/7470 cut-off events. [2023-08-24 10:43:33,819 INFO L125 PetriNetUnfolderBase]: For 456033/456033 co-relation queries the response was YES. [2023-08-24 10:43:33,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104317 conditions, 7470 events. 3748/7470 cut-off events. For 456033/456033 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 61845 event pairs, 182 based on Foata normal form. 12/7482 useless extension candidates. Maximal degree in co-relation 104146. Up to 2086 conditions per place. [2023-08-24 10:43:33,936 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 656 selfloop transitions, 996 changer transitions 13/1665 dead transitions. [2023-08-24 10:43:33,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 1665 transitions, 61949 flow [2023-08-24 10:43:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 10:43:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 10:43:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4826 transitions. [2023-08-24 10:43:33,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.254026739656806 [2023-08-24 10:43:33,941 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4826 transitions. [2023-08-24 10:43:33,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4826 transitions. [2023-08-24 10:43:33,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:43:33,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4826 transitions. [2023-08-24 10:43:33,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 104.91304347826087) internal successors, (4826), 46 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:33,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 413.0) internal successors, (19411), 47 states have internal predecessors, (19411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:33,952 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 413.0) internal successors, (19411), 47 states have internal predecessors, (19411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:33,952 INFO L175 Difference]: Start difference. First operand has 610 places, 1429 transitions, 54651 flow. Second operand 46 states and 4826 transitions. [2023-08-24 10:43:33,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 1665 transitions, 61949 flow [2023-08-24 10:43:39,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1665 transitions, 60740 flow, removed 188 selfloop flow, removed 8 redundant places. [2023-08-24 10:43:39,979 INFO L231 Difference]: Finished difference. Result has 656 places, 1501 transitions, 58990 flow [2023-08-24 10:43:39,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=53528, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=58990, PETRI_PLACES=656, PETRI_TRANSITIONS=1501} [2023-08-24 10:43:39,981 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 635 predicate places. [2023-08-24 10:43:39,981 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 1501 transitions, 58990 flow [2023-08-24 10:43:39,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 100.76923076923077) internal successors, (2620), 26 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:39,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:43:39,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:43:39,986 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 10:43:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 10:43:40,183 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 10:43:40,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:43:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1205295773, now seen corresponding path program 3 times [2023-08-24 10:43:40,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:43:40,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86662996] [2023-08-24 10:43:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:43:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:43:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:43:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:40,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:43:40,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86662996] [2023-08-24 10:43:40,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86662996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:43:40,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135967384] [2023-08-24 10:43:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:43:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:43:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:43:40,320 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 10:43:40,322 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 10:43:40,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:43:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:43:40,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 10:43:40,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:43:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:40,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:43:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:40,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135967384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:43:40,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:43:40,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 10:43:40,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023495093] [2023-08-24 10:43:40,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:43:40,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 10:43:40,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:43:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 10:43:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-08-24 10:43:40,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:43:40,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 1501 transitions, 58990 flow. Second operand has 14 states, 14 states have (on average 154.92857142857142) internal successors, (2169), 14 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:40,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:43:40,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:43:40,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:43:45,696 INFO L124 PetriNetUnfolderBase]: 3649/7171 cut-off events. [2023-08-24 10:43:45,696 INFO L125 PetriNetUnfolderBase]: For 480754/480754 co-relation queries the response was YES. [2023-08-24 10:43:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103034 conditions, 7171 events. 3649/7171 cut-off events. For 480754/480754 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 58270 event pairs, 587 based on Foata normal form. 50/7221 useless extension candidates. Maximal degree in co-relation 102854. Up to 2346 conditions per place. [2023-08-24 10:43:45,815 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 888 selfloop transitions, 651 changer transitions 1/1540 dead transitions. [2023-08-24 10:43:45,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 1540 transitions, 62128 flow [2023-08-24 10:43:45,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 10:43:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 10:43:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1615 transitions. [2023-08-24 10:43:45,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3910411622276029 [2023-08-24 10:43:45,817 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1615 transitions. [2023-08-24 10:43:45,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1615 transitions. [2023-08-24 10:43:45,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:43:45,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1615 transitions. [2023-08-24 10:43:45,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 161.5) internal successors, (1615), 10 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:45,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:45,820 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 413.0) internal successors, (4543), 11 states have internal predecessors, (4543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:45,820 INFO L175 Difference]: Start difference. First operand has 656 places, 1501 transitions, 58990 flow. Second operand 10 states and 1615 transitions. [2023-08-24 10:43:45,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 1540 transitions, 62128 flow [2023-08-24 10:43:51,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 1540 transitions, 61475 flow, removed 173 selfloop flow, removed 19 redundant places. [2023-08-24 10:43:52,021 INFO L231 Difference]: Finished difference. Result has 647 places, 1493 transitions, 59603 flow [2023-08-24 10:43:52,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=57946, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=59603, PETRI_PLACES=647, PETRI_TRANSITIONS=1493} [2023-08-24 10:43:52,023 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 626 predicate places. [2023-08-24 10:43:52,023 INFO L495 AbstractCegarLoop]: Abstraction has has 647 places, 1493 transitions, 59603 flow [2023-08-24 10:43:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 154.92857142857142) internal successors, (2169), 14 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:52,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:43:52,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:43:52,033 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 10:43:52,230 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,SelfDestructingSolverStorable39 [2023-08-24 10:43:52,230 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:43:52,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:43:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash -471475896, now seen corresponding path program 4 times [2023-08-24 10:43:52,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:43:52,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184928986] [2023-08-24 10:43:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:43:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:43:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:43:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:52,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:43:52,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184928986] [2023-08-24 10:43:52,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184928986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:43:52,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877261426] [2023-08-24 10:43:52,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:43:52,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:43:52,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:43:52,585 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 10:43:52,586 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 10:43:52,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:43:52,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:43:52,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 10:43:52,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:43:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:53,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:43:53,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:43:53,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:43:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:43:53,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877261426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:43:53,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:43:53,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-24 10:43:53,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787713127] [2023-08-24 10:43:53,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:43:53,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 10:43:53,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:43:53,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 10:43:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-24 10:43:53,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:43:53,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 647 places, 1493 transitions, 59603 flow. Second operand has 19 states, 19 states have (on average 154.8421052631579) internal successors, (2942), 19 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:53,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:43:53,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:43:53,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:44:01,575 INFO L124 PetriNetUnfolderBase]: 3962/7760 cut-off events. [2023-08-24 10:44:01,576 INFO L125 PetriNetUnfolderBase]: For 514728/514728 co-relation queries the response was YES. [2023-08-24 10:44:01,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111987 conditions, 7760 events. 3962/7760 cut-off events. For 514728/514728 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 63415 event pairs, 256 based on Foata normal form. 40/7800 useless extension candidates. Maximal degree in co-relation 111807. Up to 1403 conditions per place. [2023-08-24 10:44:01,709 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 743 selfloop transitions, 1030 changer transitions 1/1774 dead transitions. [2023-08-24 10:44:01,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1774 transitions, 69289 flow [2023-08-24 10:44:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 10:44:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 10:44:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 6369 transitions. [2023-08-24 10:44:01,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3855326876513317 [2023-08-24 10:44:01,713 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 6369 transitions. [2023-08-24 10:44:01,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 6369 transitions. [2023-08-24 10:44:01,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:44:01,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 6369 transitions. [2023-08-24 10:44:01,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 159.225) internal successors, (6369), 40 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:44:01,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 413.0) internal successors, (16933), 41 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:44:01,730 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 413.0) internal successors, (16933), 41 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:44:01,730 INFO L175 Difference]: Start difference. First operand has 647 places, 1493 transitions, 59603 flow. Second operand 40 states and 6369 transitions. [2023-08-24 10:44:01,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1774 transitions, 69289 flow [2023-08-24 10:44:08,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 1774 transitions, 67104 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-24 10:44:08,746 INFO L231 Difference]: Finished difference. Result has 687 places, 1599 transitions, 64459 flow [2023-08-24 10:44:08,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=57513, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=929, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=64459, PETRI_PLACES=687, PETRI_TRANSITIONS=1599} [2023-08-24 10:44:08,749 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 666 predicate places. [2023-08-24 10:44:08,749 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 1599 transitions, 64459 flow [2023-08-24 10:44:08,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 154.8421052631579) internal successors, (2942), 19 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:44:08,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:44:08,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:44:08,758 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 10:44:08,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:44:08,956 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:44:08,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:44:08,956 INFO L85 PathProgramCache]: Analyzing trace with hash 767755593, now seen corresponding path program 5 times [2023-08-24 10:44:08,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:44:08,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206234117] [2023-08-24 10:44:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:44:08,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:44:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:44:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:44:09,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:44:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206234117] [2023-08-24 10:44:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206234117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:44:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489873387] [2023-08-24 10:44:09,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:44:09,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:44:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:44:09,108 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 10:44:09,109 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 10:44:09,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:44:09,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:44:09,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 10:44:09,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:44:09,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:44:09,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:44:09,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:44:09,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:44:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:44:09,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:44:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:44:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489873387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:44:13,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:44:13,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-08-24 10:44:13,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306060353] [2023-08-24 10:44:13,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:44:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:44:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:44:13,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:44:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-08-24 10:44:13,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 10:44:13,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 1599 transitions, 64459 flow. Second operand has 24 states, 24 states have (on average 80.79166666666667) internal successors, (1939), 24 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:44:13,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:44:13,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 10:44:13,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:44:33,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:44:35,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:44:37,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:44:50,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:44:58,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:45:01,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:45:06,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:45:12,048 INFO L124 PetriNetUnfolderBase]: 4270/8343 cut-off events. [2023-08-24 10:45:12,048 INFO L125 PetriNetUnfolderBase]: For 551034/551034 co-relation queries the response was YES. [2023-08-24 10:45:12,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122189 conditions, 8343 events. 4270/8343 cut-off events. For 551034/551034 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 68792 event pairs, 329 based on Foata normal form. 75/8418 useless extension candidates. Maximal degree in co-relation 121999. Up to 2316 conditions per place. [2023-08-24 10:45:12,192 INFO L140 encePairwiseOnDemand]: 401/413 looper letters, 1125 selfloop transitions, 818 changer transitions 25/1968 dead transitions. [2023-08-24 10:45:12,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 761 places, 1968 transitions, 77475 flow [2023-08-24 10:45:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 10:45:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 10:45:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6397 transitions. [2023-08-24 10:45:12,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20380400152924685 [2023-08-24 10:45:12,198 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6397 transitions. [2023-08-24 10:45:12,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6397 transitions. [2023-08-24 10:45:12,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:45:12,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6397 transitions. [2023-08-24 10:45:12,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 84.17105263157895) internal successors, (6397), 76 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:12,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 413.0) internal successors, (31801), 77 states have internal predecessors, (31801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:12,227 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 413.0) internal successors, (31801), 77 states have internal predecessors, (31801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:12,227 INFO L175 Difference]: Start difference. First operand has 687 places, 1599 transitions, 64459 flow. Second operand 76 states and 6397 transitions. [2023-08-24 10:45:12,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 761 places, 1968 transitions, 77475 flow [2023-08-24 10:45:19,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 1968 transitions, 75514 flow, removed 202 selfloop flow, removed 19 redundant places. [2023-08-24 10:45:19,849 INFO L231 Difference]: Finished difference. Result has 764 places, 1723 transitions, 70212 flow [2023-08-24 10:45:19,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=62055, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=812, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=70212, PETRI_PLACES=764, PETRI_TRANSITIONS=1723} [2023-08-24 10:45:19,851 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 743 predicate places. [2023-08-24 10:45:19,852 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 1723 transitions, 70212 flow [2023-08-24 10:45:19,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.79166666666667) internal successors, (1939), 24 states have internal predecessors, (1939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:19,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:45:19,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:45:19,860 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 10:45:20,057 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,SelfDestructingSolverStorable41 [2023-08-24 10:45:20,058 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:45:20,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:45:20,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1662878432, now seen corresponding path program 6 times [2023-08-24 10:45:20,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:45:20,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446210991] [2023-08-24 10:45:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:45:20,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:45:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:45:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:20,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:45:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446210991] [2023-08-24 10:45:20,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446210991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:45:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582946770] [2023-08-24 10:45:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:45:20,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:45:20,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:45:20,301 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 10:45:20,302 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 10:45:20,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:45:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:45:20,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 10:45:20,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:45:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:20,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:45:20,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:45:20,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:45:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:21,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582946770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:45:21,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:45:21,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 10:45:21,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108794150] [2023-08-24 10:45:21,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:45:21,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:45:21,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:45:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:45:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 10:45:21,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:45:21,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 1723 transitions, 70212 flow. Second operand has 18 states, 18 states have (on average 154.83333333333334) internal successors, (2787), 18 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:21,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:45:21,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:45:21,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:45:27,423 INFO L124 PetriNetUnfolderBase]: 4243/8281 cut-off events. [2023-08-24 10:45:27,424 INFO L125 PetriNetUnfolderBase]: For 551103/551103 co-relation queries the response was YES. [2023-08-24 10:45:27,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123027 conditions, 8281 events. 4243/8281 cut-off events. For 551103/551103 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 68468 event pairs, 962 based on Foata normal form. 24/8305 useless extension candidates. Maximal degree in co-relation 122819. Up to 4950 conditions per place. [2023-08-24 10:45:27,578 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1319 selfloop transitions, 474 changer transitions 0/1793 dead transitions. [2023-08-24 10:45:27,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 1793 transitions, 74080 flow [2023-08-24 10:45:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 10:45:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 10:45:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3030 transitions. [2023-08-24 10:45:27,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386134828596916 [2023-08-24 10:45:27,581 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3030 transitions. [2023-08-24 10:45:27,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3030 transitions. [2023-08-24 10:45:27,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:45:27,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3030 transitions. [2023-08-24 10:45:27,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 159.47368421052633) internal successors, (3030), 19 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:27,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 413.0) internal successors, (8260), 20 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:27,587 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 413.0) internal successors, (8260), 20 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:27,587 INFO L175 Difference]: Start difference. First operand has 764 places, 1723 transitions, 70212 flow. Second operand 19 states and 3030 transitions. [2023-08-24 10:45:27,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 1793 transitions, 74080 flow [2023-08-24 10:45:35,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 1793 transitions, 72630 flow, removed 260 selfloop flow, removed 34 redundant places. [2023-08-24 10:45:35,293 INFO L231 Difference]: Finished difference. Result has 749 places, 1725 transitions, 69891 flow [2023-08-24 10:45:35,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=68652, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=69891, PETRI_PLACES=749, PETRI_TRANSITIONS=1725} [2023-08-24 10:45:35,295 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 728 predicate places. [2023-08-24 10:45:35,295 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 1725 transitions, 69891 flow [2023-08-24 10:45:35,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 154.83333333333334) internal successors, (2787), 18 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:35,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:45:35,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:45:35,301 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 10:45:35,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:45:35,496 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:45:35,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:45:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -252274690, now seen corresponding path program 19 times [2023-08-24 10:45:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:45:35,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884993171] [2023-08-24 10:45:35,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:45:35,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:45:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:45:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:35,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:45:35,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884993171] [2023-08-24 10:45:35,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884993171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:45:35,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677542402] [2023-08-24 10:45:35,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:45:35,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:45:35,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:45:35,633 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 10:45:35,636 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 10:45:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:45:35,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-24 10:45:35,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:45:35,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:45:35,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:45:35,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:45:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:45:36,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:45:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677542402] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:45:37,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:45:37,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 6] total 22 [2023-08-24 10:45:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768490050] [2023-08-24 10:45:37,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:45:37,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:45:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:45:37,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:45:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-08-24 10:45:37,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 413 [2023-08-24 10:45:37,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 1725 transitions, 69891 flow. Second operand has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:37,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:45:37,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 413 [2023-08-24 10:45:37,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:45:42,904 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 [] [2023-08-24 10:45:47,856 INFO L124 PetriNetUnfolderBase]: 4510/8655 cut-off events. [2023-08-24 10:45:47,856 INFO L125 PetriNetUnfolderBase]: For 562449/562449 co-relation queries the response was YES. [2023-08-24 10:45:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129219 conditions, 8655 events. 4510/8655 cut-off events. For 562449/562449 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 70658 event pairs, 358 based on Foata normal form. 5/8660 useless extension candidates. Maximal degree in co-relation 129010. Up to 3764 conditions per place. [2023-08-24 10:45:48,029 INFO L140 encePairwiseOnDemand]: 403/413 looper letters, 1185 selfloop transitions, 763 changer transitions 18/1966 dead transitions. [2023-08-24 10:45:48,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1966 transitions, 80886 flow [2023-08-24 10:45:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 10:45:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 10:45:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3744 transitions. [2023-08-24 10:45:48,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25181598062953997 [2023-08-24 10:45:48,033 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3744 transitions. [2023-08-24 10:45:48,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3744 transitions. [2023-08-24 10:45:48,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:45:48,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3744 transitions. [2023-08-24 10:45:48,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 104.0) internal successors, (3744), 36 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:48,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 413.0) internal successors, (15281), 37 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:48,043 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 413.0) internal successors, (15281), 37 states have internal predecessors, (15281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:48,043 INFO L175 Difference]: Start difference. First operand has 749 places, 1725 transitions, 69891 flow. Second operand 36 states and 3744 transitions. [2023-08-24 10:45:48,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1966 transitions, 80886 flow [2023-08-24 10:45:56,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 1966 transitions, 80228 flow, removed 40 selfloop flow, removed 13 redundant places. [2023-08-24 10:45:57,030 INFO L231 Difference]: Finished difference. Result has 778 places, 1846 transitions, 76224 flow [2023-08-24 10:45:57,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=69230, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=76224, PETRI_PLACES=778, PETRI_TRANSITIONS=1846} [2023-08-24 10:45:57,031 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 757 predicate places. [2023-08-24 10:45:57,032 INFO L495 AbstractCegarLoop]: Abstraction has has 778 places, 1846 transitions, 76224 flow [2023-08-24 10:45:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.0) internal successors, (2222), 22 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:57,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:45:57,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:45:57,044 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 10:45:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:45:57,238 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:45:57,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:45:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash 683664269, now seen corresponding path program 7 times [2023-08-24 10:45:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:45:57,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767667140] [2023-08-24 10:45:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:45:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:45:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:45:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:57,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:45:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767667140] [2023-08-24 10:45:57,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767667140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:45:57,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698361529] [2023-08-24 10:45:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:45:57,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:45:57,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:45:57,479 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 10:45:57,481 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 10:45:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:45:57,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 10:45:57,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:45:57,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2023-08-24 10:45:57,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-24 10:45:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:57,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:45:58,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:45:58,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:45:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:45:58,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698361529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:45:58,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:45:58,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 10:45:58,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104497540] [2023-08-24 10:45:58,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:45:58,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:45:58,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:45:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:45:58,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-08-24 10:45:58,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:45:58,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1846 transitions, 76224 flow. Second operand has 18 states, 18 states have (on average 154.66666666666666) internal successors, (2784), 18 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:45:58,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:45:58,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:45:58,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:46:05,795 INFO L124 PetriNetUnfolderBase]: 4497/8627 cut-off events. [2023-08-24 10:46:05,796 INFO L125 PetriNetUnfolderBase]: For 586340/586340 co-relation queries the response was YES. [2023-08-24 10:46:05,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131147 conditions, 8627 events. 4497/8627 cut-off events. For 586340/586340 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 70327 event pairs, 935 based on Foata normal form. 10/8637 useless extension candidates. Maximal degree in co-relation 130932. Up to 4220 conditions per place. [2023-08-24 10:46:05,961 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1586 selfloop transitions, 361 changer transitions 0/1947 dead transitions. [2023-08-24 10:46:05,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 1947 transitions, 81937 flow [2023-08-24 10:46:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 10:46:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 10:46:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3786 transitions. [2023-08-24 10:46:05,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38196125907990314 [2023-08-24 10:46:05,964 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3786 transitions. [2023-08-24 10:46:05,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3786 transitions. [2023-08-24 10:46:05,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:46:05,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3786 transitions. [2023-08-24 10:46:05,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 157.75) internal successors, (3786), 24 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:05,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:05,972 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 413.0) internal successors, (10325), 25 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:05,972 INFO L175 Difference]: Start difference. First operand has 778 places, 1846 transitions, 76224 flow. Second operand 24 states and 3786 transitions. [2023-08-24 10:46:05,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 1947 transitions, 81937 flow [2023-08-24 10:46:15,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1947 transitions, 81067 flow, removed 215 selfloop flow, removed 18 redundant places. [2023-08-24 10:46:15,375 INFO L231 Difference]: Finished difference. Result has 781 places, 1855 transitions, 76587 flow [2023-08-24 10:46:15,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=75358, PETRI_DIFFERENCE_MINUEND_PLACES=752, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=76587, PETRI_PLACES=781, PETRI_TRANSITIONS=1855} [2023-08-24 10:46:15,377 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 760 predicate places. [2023-08-24 10:46:15,377 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 1855 transitions, 76587 flow [2023-08-24 10:46:15,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 154.66666666666666) internal successors, (2784), 18 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:15,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:46:15,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:46:15,382 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 10:46:15,578 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,SelfDestructingSolverStorable44 [2023-08-24 10:46:15,578 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:46:15,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:46:15,578 INFO L85 PathProgramCache]: Analyzing trace with hash -86525379, now seen corresponding path program 13 times [2023-08-24 10:46:15,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:46:15,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979755663] [2023-08-24 10:46:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:46:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:46:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:46:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:46:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979755663] [2023-08-24 10:46:15,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979755663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:46:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242295887] [2023-08-24 10:46:15,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:46:15,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:46:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:46:15,768 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 10:46:15,770 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 10:46:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:46:16,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 10:46:16,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:46:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:16,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:46:16,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-08-24 10:46:16,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 112 [2023-08-24 10:46:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:16,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242295887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:46:16,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:46:16,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-24 10:46:16,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908609510] [2023-08-24 10:46:16,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:46:16,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 10:46:16,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:46:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 10:46:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-08-24 10:46:16,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:46:16,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 1855 transitions, 76587 flow. Second operand has 15 states, 15 states have (on average 155.06666666666666) internal successors, (2326), 15 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:16,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:46:16,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:46:16,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:46:18,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:46:20,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:46:27,901 INFO L124 PetriNetUnfolderBase]: 4538/8726 cut-off events. [2023-08-24 10:46:27,901 INFO L125 PetriNetUnfolderBase]: For 617193/617193 co-relation queries the response was YES. [2023-08-24 10:46:28,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131594 conditions, 8726 events. 4538/8726 cut-off events. For 617193/617193 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 71718 event pairs, 576 based on Foata normal form. 48/8774 useless extension candidates. Maximal degree in co-relation 131374. Up to 3048 conditions per place. [2023-08-24 10:46:28,063 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1179 selfloop transitions, 808 changer transitions 0/1987 dead transitions. [2023-08-24 10:46:28,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1987 transitions, 81663 flow [2023-08-24 10:46:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 10:46:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 10:46:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5088 transitions. [2023-08-24 10:46:28,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38498789346246975 [2023-08-24 10:46:28,066 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5088 transitions. [2023-08-24 10:46:28,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5088 transitions. [2023-08-24 10:46:28,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:46:28,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5088 transitions. [2023-08-24 10:46:28,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 159.0) internal successors, (5088), 32 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:28,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 413.0) internal successors, (13629), 33 states have internal predecessors, (13629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:28,075 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 413.0) internal successors, (13629), 33 states have internal predecessors, (13629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:28,075 INFO L175 Difference]: Start difference. First operand has 781 places, 1855 transitions, 76587 flow. Second operand 32 states and 5088 transitions. [2023-08-24 10:46:28,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1987 transitions, 81663 flow [2023-08-24 10:46:37,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 796 places, 1987 transitions, 81284 flow, removed 46 selfloop flow, removed 16 redundant places. [2023-08-24 10:46:37,610 INFO L231 Difference]: Finished difference. Result has 801 places, 1868 transitions, 78436 flow [2023-08-24 10:46:37,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=76112, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=78436, PETRI_PLACES=801, PETRI_TRANSITIONS=1868} [2023-08-24 10:46:37,612 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 780 predicate places. [2023-08-24 10:46:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 1868 transitions, 78436 flow [2023-08-24 10:46:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 155.06666666666666) internal successors, (2326), 15 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:37,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:46:37,612 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:46:37,618 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 10:46:37,813 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,SelfDestructingSolverStorable45 [2023-08-24 10:46:37,813 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:46:37,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:46:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 279612453, now seen corresponding path program 14 times [2023-08-24 10:46:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:46:37,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231114288] [2023-08-24 10:46:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:46:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:46:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:46:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:38,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:46:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231114288] [2023-08-24 10:46:38,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231114288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:46:38,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124788114] [2023-08-24 10:46:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:46:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:46:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:46:38,009 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:46:38,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 10:46:38,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:46:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:46:38,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 10:46:38,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:46:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:38,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:46:38,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 104 [2023-08-24 10:46:38,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2023-08-24 10:46:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:38,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124788114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:46:38,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:46:38,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 10:46:38,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732085589] [2023-08-24 10:46:38,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:46:38,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:46:38,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:46:38,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:46:38,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:46:38,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:46:38,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 801 places, 1868 transitions, 78436 flow. Second operand has 17 states, 17 states have (on average 154.88235294117646) internal successors, (2633), 17 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:38,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:46:38,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:46:38,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:46:48,395 INFO L124 PetriNetUnfolderBase]: 4594/8816 cut-off events. [2023-08-24 10:46:48,396 INFO L125 PetriNetUnfolderBase]: For 651619/651619 co-relation queries the response was YES. [2023-08-24 10:46:48,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135254 conditions, 8816 events. 4594/8816 cut-off events. For 651619/651619 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 72443 event pairs, 554 based on Foata normal form. 60/8876 useless extension candidates. Maximal degree in co-relation 135032. Up to 3054 conditions per place. [2023-08-24 10:46:48,566 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1154 selfloop transitions, 865 changer transitions 0/2019 dead transitions. [2023-08-24 10:46:48,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 835 places, 2019 transitions, 84378 flow [2023-08-24 10:46:48,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 10:46:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 10:46:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5568 transitions. [2023-08-24 10:46:48,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851954341058457 [2023-08-24 10:46:48,569 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5568 transitions. [2023-08-24 10:46:48,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5568 transitions. [2023-08-24 10:46:48,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:46:48,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5568 transitions. [2023-08-24 10:46:48,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 159.0857142857143) internal successors, (5568), 35 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:48,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 413.0) internal successors, (14868), 36 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:48,579 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 413.0) internal successors, (14868), 36 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:48,579 INFO L175 Difference]: Start difference. First operand has 801 places, 1868 transitions, 78436 flow. Second operand 35 states and 5568 transitions. [2023-08-24 10:46:48,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 835 places, 2019 transitions, 84378 flow [2023-08-24 10:46:58,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 2019 transitions, 82863 flow, removed 57 selfloop flow, removed 25 redundant places. [2023-08-24 10:46:58,669 INFO L231 Difference]: Finished difference. Result has 812 places, 1900 transitions, 79901 flow [2023-08-24 10:46:58,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=76732, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=835, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=79901, PETRI_PLACES=812, PETRI_TRANSITIONS=1900} [2023-08-24 10:46:58,670 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 791 predicate places. [2023-08-24 10:46:58,670 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 1900 transitions, 79901 flow [2023-08-24 10:46:58,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 154.88235294117646) internal successors, (2633), 17 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:58,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:46:58,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:46:58,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 10:46:58,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-24 10:46:58,872 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:46:58,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:46:58,872 INFO L85 PathProgramCache]: Analyzing trace with hash -921628186, now seen corresponding path program 8 times [2023-08-24 10:46:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:46:58,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714981110] [2023-08-24 10:46:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:46:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:46:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:46:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:46:59,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:46:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714981110] [2023-08-24 10:46:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714981110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:46:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017896088] [2023-08-24 10:46:59,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:46:59,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:46:59,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:46:59,064 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:46:59,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 10:46:59,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:46:59,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:46:59,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-24 10:46:59,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:46:59,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:46:59,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:46:59,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:47:00,126 INFO L322 Elim1Store]: treesize reduction 236, result has 0.4 percent of original size [2023-08-24 10:47:00,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 695 treesize of output 267 [2023-08-24 10:47:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:47:00,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:47:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:47:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017896088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:47:03,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:47:03,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-08-24 10:47:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678841009] [2023-08-24 10:47:03,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:47:03,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 10:47:03,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:47:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 10:47:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-08-24 10:47:03,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 10:47:03,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 1900 transitions, 79901 flow. Second operand has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 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 10:47:03,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:47:03,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 10:47:03,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:47:29,063 WARN L234 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 186 DAG size of output: 172 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:47:48,885 INFO L124 PetriNetUnfolderBase]: 4791/9142 cut-off events. [2023-08-24 10:47:48,885 INFO L125 PetriNetUnfolderBase]: For 662369/662369 co-relation queries the response was YES. [2023-08-24 10:47:49,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140796 conditions, 9142 events. 4791/9142 cut-off events. For 662369/662369 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 75104 event pairs, 539 based on Foata normal form. 13/9155 useless extension candidates. Maximal degree in co-relation 140578. Up to 7261 conditions per place. [2023-08-24 10:47:49,063 INFO L140 encePairwiseOnDemand]: 402/413 looper letters, 1753 selfloop transitions, 352 changer transitions 13/2118 dead transitions. [2023-08-24 10:47:49,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2118 transitions, 87990 flow [2023-08-24 10:47:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-24 10:47:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-24 10:47:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4635 transitions. [2023-08-24 10:47:49,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20405018710103456 [2023-08-24 10:47:49,067 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4635 transitions. [2023-08-24 10:47:49,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4635 transitions. [2023-08-24 10:47:49,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:47:49,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4635 transitions. [2023-08-24 10:47:49,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 84.27272727272727) internal successors, (4635), 55 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:49,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 413.0) internal successors, (23128), 56 states have internal predecessors, (23128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:49,081 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 413.0) internal successors, (23128), 56 states have internal predecessors, (23128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:49,081 INFO L175 Difference]: Start difference. First operand has 812 places, 1900 transitions, 79901 flow. Second operand 55 states and 4635 transitions. [2023-08-24 10:47:49,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 2118 transitions, 87990 flow [2023-08-24 10:47:59,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2118 transitions, 86314 flow, removed 200 selfloop flow, removed 15 redundant places. [2023-08-24 10:47:59,413 INFO L231 Difference]: Finished difference. Result has 865 places, 1972 transitions, 82297 flow [2023-08-24 10:47:59,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=78266, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=82297, PETRI_PLACES=865, PETRI_TRANSITIONS=1972} [2023-08-24 10:47:59,414 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 844 predicate places. [2023-08-24 10:47:59,414 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 1972 transitions, 82297 flow [2023-08-24 10:47:59,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 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 10:47:59,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:47:59,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:47:59,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 10:47:59,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 10:47:59,621 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:47:59,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:47:59,621 INFO L85 PathProgramCache]: Analyzing trace with hash 88911901, now seen corresponding path program 9 times [2023-08-24 10:47:59,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:47:59,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066642588] [2023-08-24 10:47:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:47:59,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:47:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:47:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:47:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:47:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066642588] [2023-08-24 10:47:59,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066642588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:47:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803090941] [2023-08-24 10:47:59,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:47:59,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:47:59,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:47:59,851 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:47:59,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 10:48:00,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 10:48:00,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:48:00,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 10:48:00,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:48:00,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:48:00,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:48:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:48:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803090941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:48:00,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:48:00,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-24 10:48:00,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258243087] [2023-08-24 10:48:00,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:48:00,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 10:48:00,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:48:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 10:48:00,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-08-24 10:48:00,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 413 [2023-08-24 10:48:00,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 865 places, 1972 transitions, 82297 flow. Second operand has 16 states, 16 states have (on average 154.9375) internal successors, (2479), 16 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:00,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:48:00,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 413 [2023-08-24 10:48:00,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:48:10,855 INFO L124 PetriNetUnfolderBase]: 5408/10246 cut-off events. [2023-08-24 10:48:10,855 INFO L125 PetriNetUnfolderBase]: For 741599/741599 co-relation queries the response was YES. [2023-08-24 10:48:10,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157940 conditions, 10246 events. 5408/10246 cut-off events. For 741599/741599 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 84915 event pairs, 982 based on Foata normal form. 142/10388 useless extension candidates. Maximal degree in co-relation 157709. Up to 3965 conditions per place. [2023-08-24 10:48:11,056 INFO L140 encePairwiseOnDemand]: 407/413 looper letters, 1706 selfloop transitions, 678 changer transitions 0/2384 dead transitions. [2023-08-24 10:48:11,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 895 places, 2384 transitions, 101525 flow [2023-08-24 10:48:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 10:48:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 10:48:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5222 transitions. [2023-08-24 10:48:11,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38315356959424757 [2023-08-24 10:48:11,059 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5222 transitions. [2023-08-24 10:48:11,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5222 transitions. [2023-08-24 10:48:11,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:48:11,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5222 transitions. [2023-08-24 10:48:11,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 158.24242424242425) internal successors, (5222), 33 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:11,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 413.0) internal successors, (14042), 34 states have internal predecessors, (14042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:11,068 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 413.0) internal successors, (14042), 34 states have internal predecessors, (14042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:11,068 INFO L175 Difference]: Start difference. First operand has 865 places, 1972 transitions, 82297 flow. Second operand 33 states and 5222 transitions. [2023-08-24 10:48:11,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 895 places, 2384 transitions, 101525 flow [2023-08-24 10:48:23,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 869 places, 2384 transitions, 100735 flow, removed 260 selfloop flow, removed 26 redundant places. [2023-08-24 10:48:23,663 INFO L231 Difference]: Finished difference. Result has 884 places, 2172 transitions, 93028 flow [2023-08-24 10:48:23,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=413, PETRI_DIFFERENCE_MINUEND_FLOW=81060, PETRI_DIFFERENCE_MINUEND_PLACES=837, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=93028, PETRI_PLACES=884, PETRI_TRANSITIONS=2172} [2023-08-24 10:48:23,664 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 863 predicate places. [2023-08-24 10:48:23,664 INFO L495 AbstractCegarLoop]: Abstraction has has 884 places, 2172 transitions, 93028 flow [2023-08-24 10:48:23,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 154.9375) internal successors, (2479), 16 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:23,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:48:23,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:48:23,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 10:48:23,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:48:23,865 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:48:23,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:48:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1518843942, now seen corresponding path program 10 times [2023-08-24 10:48:23,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:48:23,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112949130] [2023-08-24 10:48:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:48:23,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:48:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:48:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:48:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:48:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112949130] [2023-08-24 10:48:24,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112949130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:48:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646912720] [2023-08-24 10:48:24,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:48:24,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:48:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:48:24,040 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:48:24,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 10:48:24,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:48:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:48:24,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 10:48:24,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:48:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:48:24,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-24 10:48:24,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 10:48:24,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:48:24,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:48:25,115 INFO L322 Elim1Store]: treesize reduction 236, result has 0.4 percent of original size [2023-08-24 10:48:25,115 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 695 treesize of output 267 [2023-08-24 10:48:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:48:25,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:48:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:48:31,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646912720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:48:31,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:48:31,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 26 [2023-08-24 10:48:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482917574] [2023-08-24 10:48:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:48:31,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 10:48:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:48:31,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 10:48:31,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-08-24 10:48:31,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 413 [2023-08-24 10:48:31,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 2172 transitions, 93028 flow. Second operand has 26 states, 26 states have (on average 80.76923076923077) internal successors, (2100), 26 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 10:48:31,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:48:31,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 413 [2023-08-24 10:48:31,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:48:44,293 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 205 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-24 10:48:52,849 WARN L266 SmtUtils]: Removed 21 from assertion stack [2023-08-24 10:48:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 10:48:52,850 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 10:48:52,855 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 10:48:52,855 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:48:52,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 10:48:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 10:48:53,051 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 205 for 5839ms.. [2023-08-24 10:48:53,052 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 10:48:53,052 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 10:48:53,052 INFO L445 BasicCegarLoop]: Path program histogram: [19, 14, 10, 6, 1] [2023-08-24 10:48:53,055 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 10:48:53,055 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 10:48:53,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 10:48:53 BasicIcfg [2023-08-24 10:48:53,057 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 10:48:53,057 INFO L158 Benchmark]: Toolchain (without parser) took 813443.19ms. Allocated memory was 337.6MB in the beginning and 6.0GB in the end (delta: 5.7GB). Free memory was 313.9MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2023-08-24 10:48:53,057 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 337.6MB. Free memory is still 314.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:48:53,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.24ms. Allocated memory is still 337.6MB. Free memory was 313.4MB in the beginning and 301.8MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 10:48:53,058 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.99ms. Allocated memory is still 337.6MB. Free memory was 301.8MB in the beginning and 299.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:48:53,058 INFO L158 Benchmark]: Boogie Preprocessor took 48.01ms. Allocated memory is still 337.6MB. Free memory was 299.7MB in the beginning and 298.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:48:53,058 INFO L158 Benchmark]: RCFGBuilder took 547.49ms. Allocated memory is still 337.6MB. Free memory was 298.1MB in the beginning and 280.3MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 10:48:53,058 INFO L158 Benchmark]: TraceAbstraction took 812509.54ms. Allocated memory was 337.6MB in the beginning and 6.0GB in the end (delta: 5.7GB). Free memory was 279.2MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2023-08-24 10:48:53,059 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 337.6MB. Free memory is still 314.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 280.24ms. Allocated memory is still 337.6MB. Free memory was 313.4MB in the beginning and 301.8MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.99ms. Allocated memory is still 337.6MB. Free memory was 301.8MB in the beginning and 299.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.01ms. Allocated memory is still 337.6MB. Free memory was 299.7MB in the beginning and 298.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 547.49ms. Allocated memory is still 337.6MB. Free memory was 298.1MB in the beginning and 280.3MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 812509.54ms. Allocated memory was 337.6MB in the beginning and 6.0GB in the end (delta: 5.7GB). Free memory was 279.2MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.8s, 174 PlacesBefore, 21 PlacesAfterwards, 185 TransitionsBefore, 17 TransitionsAfterwards, 4092 CoEnabledTransitionPairs, 7 FixpointIterations, 66 TrivialSequentialCompositions, 87 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 31 ConcurrentYvCompositions, 15 ChoiceCompositions, 218 TotalNumberOfCompositions, 3895 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3787, independent: 3777, independent conditional: 0, independent unconditional: 3777, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2360, independent: 2355, independent conditional: 0, independent unconditional: 2355, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3787, independent: 1422, independent conditional: 0, independent unconditional: 1422, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 2360, unknown conditional: 0, unknown unconditional: 2360] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 205 for 5839ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 205 for 5839ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 205 for 5839ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 264 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: 812.3s, OverallIterations: 50, TraceHistogramMax: 3, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 688.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 121 mSolverCounterUnknown, 5973 SdHoareTripleChecker+Valid, 138.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5973 mSDsluCounter, 1370 SdHoareTripleChecker+Invalid, 134.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 142 IncrementalHoareTripleChecker+Unchecked, 1131 mSDsCounter, 1215 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25330 IncrementalHoareTripleChecker+Invalid, 26808 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1215 mSolverCounterUnsat, 239 mSDtfsCounter, 25330 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3063 GetRequests, 1502 SyntacticMatches, 21 SemanticMatches, 1539 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16657 ImplicationChecksByTransitivity, 323.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93028occurred in iteration=49, InterpolantAutomatonStates: 1159, 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: 0.5s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 99.9s InterpolantComputationTime, 1638 NumberOfCodeBlocks, 1638 NumberOfCodeBlocksAsserted, 129 NumberOfCheckSat, 2269 ConstructedInterpolants, 48 QuantifiedInterpolants, 49580 SizeOfPredicates, 1078 NumberOfNonLiveVariables, 7748 ConjunctsInSsa, 1230 ConjunctsInUnsatCore, 136 InterpolantComputations, 7 PerfectInterpolantSequences, 297/720 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