/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-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 10:37:21,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 10:37:21,150 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 10:37:21,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 10:37:21,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 10:37:21,185 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 10:37:21,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 10:37:21,186 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 10:37:21,187 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 10:37:21,190 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 10:37:21,191 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 10:37:21,191 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 10:37:21,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 10:37:21,192 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 10:37:21,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 10:37:21,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 10:37:21,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 10:37:21,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 10:37:21,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 10:37:21,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 10:37:21,194 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 10:37:21,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 10:37:21,195 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 10:37:21,195 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 10:37:21,196 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 10:37:21,196 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 10:37:21,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 10:37:21,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:37:21,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 10:37:21,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 10:37:21,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 10:37:21,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 10:37:21,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 10:37:21,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 10:37:21,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 10:37:21,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 10:37:21,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 10:37:21,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 10:37:21,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 10:37:21,541 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 10:37:21,541 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 10:37:21,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-08-24 10:37:22,758 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 10:37:22,967 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 10:37:22,967 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-4.wvr.c [2023-08-24 10:37:22,973 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad109fd1/c33d4324cc99406ab74a56ccf1c9cc7a/FLAG72c7c70dc [2023-08-24 10:37:22,982 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ad109fd1/c33d4324cc99406ab74a56ccf1c9cc7a [2023-08-24 10:37:22,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 10:37:22,985 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 10:37:22,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 10:37:22,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 10:37:22,988 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 10:37:22,989 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:37:22" (1/1) ... [2023-08-24 10:37:22,990 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152a767a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:22, skipping insertion in model container [2023-08-24 10:37:22,990 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:37:22" (1/1) ... [2023-08-24 10:37:23,013 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 10:37:23,160 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-4.wvr.c[2808,2821] [2023-08-24 10:37:23,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:37:23,172 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 10:37:23,191 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-4.wvr.c[2808,2821] [2023-08-24 10:37:23,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:37:23,206 INFO L206 MainTranslator]: Completed translation [2023-08-24 10:37:23,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23 WrapperNode [2023-08-24 10:37:23,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 10:37:23,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 10:37:23,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 10:37:23,207 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 10:37:23,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,220 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,254 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 187 [2023-08-24 10:37:23,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 10:37:23,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 10:37:23,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 10:37:23,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 10:37:23,263 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,285 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,288 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,290 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,303 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 10:37:23,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 10:37:23,305 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 10:37:23,305 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 10:37:23,305 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (1/1) ... [2023-08-24 10:37:23,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:37:23,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:23,333 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 10:37:23,347 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 10:37:23,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 10:37:23,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 10:37:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 10:37:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 10:37:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 10:37:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 10:37:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 10:37:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 10:37:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 10:37:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 10:37:23,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 10:37:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 10:37:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 10:37:23,379 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 10:37:23,460 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 10:37:23,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 10:37:23,805 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 10:37:23,813 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 10:37:23,813 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 10:37:23,815 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:37:23 BoogieIcfgContainer [2023-08-24 10:37:23,815 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 10:37:23,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 10:37:23,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 10:37:23,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 10:37:23,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 10:37:22" (1/3) ... [2023-08-24 10:37:23,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286d1e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:37:23, skipping insertion in model container [2023-08-24 10:37:23,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:37:23" (2/3) ... [2023-08-24 10:37:23,824 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286d1e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:37:23, skipping insertion in model container [2023-08-24 10:37:23,824 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:37:23" (3/3) ... [2023-08-24 10:37:23,825 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2023-08-24 10:37:23,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 10:37:23,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 10:37:23,841 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 10:37:23,994 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 10:37:24,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 223 transitions, 462 flow [2023-08-24 10:37:24,153 INFO L124 PetriNetUnfolderBase]: 21/221 cut-off events. [2023-08-24 10:37:24,154 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:37:24,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 221 events. 21/221 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 376 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-08-24 10:37:24,162 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 223 transitions, 462 flow [2023-08-24 10:37:24,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 213 transitions, 438 flow [2023-08-24 10:37:24,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 10:37:24,186 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 213 transitions, 438 flow [2023-08-24 10:37:24,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 213 transitions, 438 flow [2023-08-24 10:37:24,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 213 transitions, 438 flow [2023-08-24 10:37:24,235 INFO L124 PetriNetUnfolderBase]: 21/213 cut-off events. [2023-08-24 10:37:24,236 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:37:24,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 213 events. 21/213 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 357 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 133. Up to 2 conditions per place. [2023-08-24 10:37:24,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 5492 [2023-08-24 10:37:33,637 INFO L134 LiptonReduction]: Checked pairs total: 5294 [2023-08-24 10:37:33,638 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-08-24 10:37:33,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 10:37:33,656 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;@6e64fbe1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 10:37:33,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 10:37:33,664 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 10:37:33,664 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 10:37:33,665 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:37:33,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:33,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:33,666 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 10:37:33,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:33,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2039704173, now seen corresponding path program 1 times [2023-08-24 10:37:33,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:33,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710270602] [2023-08-24 10:37:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:33,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:34,025 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 10:37:34,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:34,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710270602] [2023-08-24 10:37:34,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710270602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:34,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:34,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 10:37:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929568220] [2023-08-24 10:37:34,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 10:37:34,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 10:37:34,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 10:37:34,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 479 [2023-08-24 10:37:34,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:34,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 479 [2023-08-24 10:37:34,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:34,151 INFO L124 PetriNetUnfolderBase]: 49/84 cut-off events. [2023-08-24 10:37:34,151 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 10:37:34,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 84 events. 49/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 195 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 129. Up to 81 conditions per place. [2023-08-24 10:37:34,153 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-24 10:37:34,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-24 10:37:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 10:37:34,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 10:37:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 590 transitions. [2023-08-24 10:37:34,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41057759220598466 [2023-08-24 10:37:34,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 590 transitions. [2023-08-24 10:37:34,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 590 transitions. [2023-08-24 10:37:34,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:34,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 590 transitions. [2023-08-24 10:37:34,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,197 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 590 transitions. [2023-08-24 10:37:34,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-24 10:37:34,200 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 10:37:34,202 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-24 10:37:34,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 10:37:34,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 10:37:34,207 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-24 10:37:34,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:34,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:34,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 10:37:34,208 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 10:37:34,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 762734244, now seen corresponding path program 1 times [2023-08-24 10:37:34,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:34,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653253140] [2023-08-24 10:37:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:34,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:34,532 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 10:37:34,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:34,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653253140] [2023-08-24 10:37:34,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653253140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:34,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:34,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:37:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408205098] [2023-08-24 10:37:34,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:34,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:37:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:37:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:37:34,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:37:34,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:34,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:37:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:34,693 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-08-24 10:37:34,693 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:37:34,693 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 367 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 10:37:34,694 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 10:37:34,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-24 10:37:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:37:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:37:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 905 transitions. [2023-08-24 10:37:34,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778705636743215 [2023-08-24 10:37:34,698 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 905 transitions. [2023-08-24 10:37:34,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 905 transitions. [2023-08-24 10:37:34,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:34,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 905 transitions. [2023-08-24 10:37:34,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,705 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,706 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 905 transitions. [2023-08-24 10:37:34,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-24 10:37:34,706 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 10:37:34,707 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-24 10:37:34,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, 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 10:37:34,708 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 10:37:34,708 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-24 10:37:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:34,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:34,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 10:37:34,709 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 10:37:34,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1825936458, now seen corresponding path program 2 times [2023-08-24 10:37:34,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:34,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955749329] [2023-08-24 10:37:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:34,961 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 10:37:34,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955749329] [2023-08-24 10:37:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955749329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:34,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:34,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:37:34,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775126023] [2023-08-24 10:37:34,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:34,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:37:34,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:34,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:37:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:37:34,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:37:34,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:34,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:34,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:37:34,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:35,103 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2023-08-24 10:37:35,103 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-08-24 10:37:35,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 660 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-08-24 10:37:35,105 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-08-24 10:37:35,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-08-24 10:37:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:37:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:37:35,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 901 transitions. [2023-08-24 10:37:35,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37620041753653444 [2023-08-24 10:37:35,109 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 901 transitions. [2023-08-24 10:37:35,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 901 transitions. [2023-08-24 10:37:35,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:35,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 901 transitions. [2023-08-24 10:37:35,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.2) internal successors, (901), 5 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,116 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 901 transitions. [2023-08-24 10:37:35,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-08-24 10:37:35,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 10:37:35,118 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-08-24 10:37:35,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-24 10:37:35,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-08-24 10:37:35,119 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-08-24 10:37:35,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:35,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 10:37:35,121 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 10:37:35,121 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1776157906, now seen corresponding path program 3 times [2023-08-24 10:37:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889246436] [2023-08-24 10:37:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:35,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:35,403 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 10:37:35,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:35,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889246436] [2023-08-24 10:37:35,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889246436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:35,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:35,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:37:35,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223588867] [2023-08-24 10:37:35,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:35,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:37:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:35,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:37:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:37:35,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:37:35,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:35,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:37:35,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:35,576 INFO L124 PetriNetUnfolderBase]: 121/224 cut-off events. [2023-08-24 10:37:35,576 INFO L125 PetriNetUnfolderBase]: For 317/317 co-relation queries the response was YES. [2023-08-24 10:37:35,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 317/317 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 740 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-08-24 10:37:35,580 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-08-24 10:37:35,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-08-24 10:37:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:37:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:37:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 906 transitions. [2023-08-24 10:37:35,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37828810020876824 [2023-08-24 10:37:35,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 906 transitions. [2023-08-24 10:37:35,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 906 transitions. [2023-08-24 10:37:35,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:35,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 906 transitions. [2023-08-24 10:37:35,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,592 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,592 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 906 transitions. [2023-08-24 10:37:35,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-08-24 10:37:35,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-24 10:37:35,597 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-08-24 10:37:35,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-24 10:37:35,600 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-08-24 10:37:35,600 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-08-24 10:37:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:35,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 10:37:35,601 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 10:37:35,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash 708087740, now seen corresponding path program 4 times [2023-08-24 10:37:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:35,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277934385] [2023-08-24 10:37:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:35,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:35,810 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 10:37:35,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277934385] [2023-08-24 10:37:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277934385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:37:35,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702578225] [2023-08-24 10:37:35,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:37:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:37:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:37:35,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:37:35,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:35,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:37:35,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:35,957 INFO L124 PetriNetUnfolderBase]: 117/220 cut-off events. [2023-08-24 10:37:35,957 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-08-24 10:37:35,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 720 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-08-24 10:37:35,959 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-08-24 10:37:35,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-08-24 10:37:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:37:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:37:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 900 transitions. [2023-08-24 10:37:35,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757828810020877 [2023-08-24 10:37:35,962 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 900 transitions. [2023-08-24 10:37:35,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 900 transitions. [2023-08-24 10:37:35,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:35,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 900 transitions. [2023-08-24 10:37:35,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,968 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,968 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 900 transitions. [2023-08-24 10:37:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-08-24 10:37:35,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 10:37:35,972 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-08-24 10:37:35,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 10:37:35,973 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-24 10:37:35,973 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-08-24 10:37:35,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:35,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:35,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:35,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 10:37:35,974 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 10:37:35,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:35,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1339932644, now seen corresponding path program 5 times [2023-08-24 10:37:35,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:35,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299486686] [2023-08-24 10:37:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:35,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:36,255 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 10:37:36,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:36,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299486686] [2023-08-24 10:37:36,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299486686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:36,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:36,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:37:36,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758111296] [2023-08-24 10:37:36,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:36,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:37:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:37:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:37:36,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:37:36,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:36,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:37:36,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:36,385 INFO L124 PetriNetUnfolderBase]: 118/223 cut-off events. [2023-08-24 10:37:36,386 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2023-08-24 10:37:36,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 742 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-08-24 10:37:36,388 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-08-24 10:37:36,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-08-24 10:37:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:37:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:37:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 904 transitions. [2023-08-24 10:37:36,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774530271398747 [2023-08-24 10:37:36,391 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 904 transitions. [2023-08-24 10:37:36,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 904 transitions. [2023-08-24 10:37:36,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:36,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 904 transitions. [2023-08-24 10:37:36,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,397 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,397 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 904 transitions. [2023-08-24 10:37:36,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-08-24 10:37:36,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-24 10:37:36,401 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-08-24 10:37:36,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-08-24 10:37:36,402 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 10:37:36,402 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-08-24 10:37:36,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:36,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:36,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 10:37:36,403 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 10:37:36,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash -705494036, now seen corresponding path program 6 times [2023-08-24 10:37:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:36,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633396164] [2023-08-24 10:37:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:36,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:36,590 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 10:37:36,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:36,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633396164] [2023-08-24 10:37:36,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633396164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:37:36,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:37:36,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 10:37:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620903312] [2023-08-24 10:37:36,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:37:36,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 10:37:36,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:36,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 10:37:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 10:37:36,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:37:36,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:36,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:37:36,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:36,728 INFO L124 PetriNetUnfolderBase]: 117/216 cut-off events. [2023-08-24 10:37:36,729 INFO L125 PetriNetUnfolderBase]: For 647/647 co-relation queries the response was YES. [2023-08-24 10:37:36,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 647/647 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 691 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-08-24 10:37:36,731 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-08-24 10:37:36,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-08-24 10:37:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 10:37:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 10:37:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 900 transitions. [2023-08-24 10:37:36,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757828810020877 [2023-08-24 10:37:36,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 900 transitions. [2023-08-24 10:37:36,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 900 transitions. [2023-08-24 10:37:36,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:37:36,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 900 transitions. [2023-08-24 10:37:36,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,740 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 900 transitions. [2023-08-24 10:37:36,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-08-24 10:37:36,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 10:37:36,744 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-08-24 10:37:36,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-24 10:37:36,745 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-08-24 10:37:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-08-24 10:37:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:36,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:37:36,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:37:36,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 10:37:36,746 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 10:37:36,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:37:36,746 INFO L85 PathProgramCache]: Analyzing trace with hash -738409970, now seen corresponding path program 1 times [2023-08-24 10:37:36,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:37:36,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882664349] [2023-08-24 10:37:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:36,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:37:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:37,039 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 10:37:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:37:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882664349] [2023-08-24 10:37:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882664349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:37:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760735360] [2023-08-24 10:37:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:37:37,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:37:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:37:37,043 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 10:37:37,058 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 10:37:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:37:37,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 10:37:37,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:37:37,278 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 10:37:37,318 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 10:37:37,347 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 10:37:38,256 INFO L322 Elim1Store]: treesize reduction 184, result has 15.2 percent of original size [2023-08-24 10:37:38,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 812 treesize of output 408 [2023-08-24 10:37:38,489 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 10:37:38,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:37:44,253 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 ((.cse3 (select .cse2 (+ c_~f~0.offset (* ~x2~0 4))))) (let ((.cse0 (select .cse2 (+ (* 4 .cse3) c_~f~0.offset)))) (let ((.cse1 (select .cse2 (+ (* .cse0 4) c_~f~0.offset)))) (or (< .cse0 0) (<= c_~size~0 .cse1) (<= c_~size~0 .cse0) (< .cse1 0) (= c_~x1~0 (select .cse2 (+ c_~f~0.offset (* .cse1 4)))) (<= c_~size~0 .cse3) (< .cse3 0))))))) is different from false [2023-08-24 10:37:46,381 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:46,381 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 438 treesize of output 258 [2023-08-24 10:37:46,424 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:46,425 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 1484 treesize of output 1312 [2023-08-24 10:37:46,547 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:46,550 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 292 treesize of output 256 [2023-08-24 10:37:46,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:37:46,656 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 429 treesize of output 249 [2023-08-24 10:37:51,892 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:37:51,987 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 10:37:51,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760735360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:37:51,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:37:51,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-24 10:37:51,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307280687] [2023-08-24 10:37:51,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:37:51,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:37:51,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:37:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:37:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=405, Unknown=2, NotChecked=42, Total=552 [2023-08-24 10:37:51,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 479 [2023-08-24 10:37:51,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:37:51,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:37:51,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 479 [2023-08-24 10:37:51,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:37:56,309 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 10:37:58,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:38:01,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:38:04,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:38:07,979 WARN L539 Checker$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 10:38:12,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:38:15,278 WARN L539 Checker$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 10:38:18,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:38:20,699 WARN L539 Checker$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 10:38:20,723 INFO L124 PetriNetUnfolderBase]: 458/810 cut-off events. [2023-08-24 10:38:20,723 INFO L125 PetriNetUnfolderBase]: For 2112/2112 co-relation queries the response was YES. [2023-08-24 10:38:20,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3118 conditions, 810 events. 458/810 cut-off events. For 2112/2112 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3748 event pairs, 28 based on Foata normal form. 7/662 useless extension candidates. Maximal degree in co-relation 2323. Up to 297 conditions per place. [2023-08-24 10:38:20,729 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 98 selfloop transitions, 68 changer transitions 76/242 dead transitions. [2023-08-24 10:38:20,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 242 transitions, 1883 flow [2023-08-24 10:38:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 10:38:20,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 10:38:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2932 transitions. [2023-08-24 10:38:20,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1912839248434238 [2023-08-24 10:38:20,741 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2932 transitions. [2023-08-24 10:38:20,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2932 transitions. [2023-08-24 10:38:20,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:38:20,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2932 transitions. [2023-08-24 10:38:20,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.625) internal successors, (2932), 32 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:20,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 479.0) internal successors, (15807), 33 states have internal predecessors, (15807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:20,768 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 479.0) internal successors, (15807), 33 states have internal predecessors, (15807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:20,768 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 32 states and 2932 transitions. [2023-08-24 10:38:20,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 242 transitions, 1883 flow [2023-08-24 10:38:20,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 242 transitions, 1801 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 10:38:20,780 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 934 flow [2023-08-24 10:38:20,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=934, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2023-08-24 10:38:20,781 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 76 predicate places. [2023-08-24 10:38:20,781 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 934 flow [2023-08-24 10:38:20,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.0) internal successors, (2088), 24 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:20,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:38:20,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:38:20,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 10:38:20,987 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 10:38:20,988 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 10:38:20,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:38:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash -295458704, now seen corresponding path program 1 times [2023-08-24 10:38:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:38:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411758636] [2023-08-24 10:38:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:20,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:38:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:21,305 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 10:38:21,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:38:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411758636] [2023-08-24 10:38:21,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411758636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:38:21,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995401067] [2023-08-24 10:38:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:38:21,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:38:21,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:38:21,309 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 10:38:21,312 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 10:38:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:38:21,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:38:21,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:38:21,448 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 10:38:21,493 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 10:38:21,529 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 10:38:21,894 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-24 10:38:21,895 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 327 treesize of output 306 [2023-08-24 10:38:22,072 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 10:38:22,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:38:27,317 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:27,317 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 276 treesize of output 168 [2023-08-24 10:38:27,346 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:27,347 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 466 treesize of output 466 [2023-08-24 10:38:27,402 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:27,402 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 386 treesize of output 346 [2023-08-24 10:38:27,452 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:38:27,452 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 161 treesize of output 181 [2023-08-24 10:38:29,614 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:38:29,919 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 10:38:29,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995401067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:38:29,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:38:29,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 10:38:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875473414] [2023-08-24 10:38:29,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:38:29,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:38:29,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:38:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:38:29,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=367, Unknown=3, NotChecked=0, Total=462 [2023-08-24 10:38:29,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:38:29,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 934 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:38:29,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:38:29,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:38:29,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:38:36,167 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:38:46,807 WARN L234 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 63 DAG size of output: 60 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:38:58,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:39:04,030 WARN L539 Checker$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 10:39:12,204 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:39:14,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:39:17,168 WARN L539 Checker$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 10:39:18,396 INFO L124 PetriNetUnfolderBase]: 995/1785 cut-off events. [2023-08-24 10:39:18,396 INFO L125 PetriNetUnfolderBase]: For 9672/9672 co-relation queries the response was YES. [2023-08-24 10:39:18,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8553 conditions, 1785 events. 995/1785 cut-off events. For 9672/9672 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10087 event pairs, 79 based on Foata normal form. 27/1691 useless extension candidates. Maximal degree in co-relation 8356. Up to 631 conditions per place. [2023-08-24 10:39:18,409 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 192 selfloop transitions, 170 changer transitions 107/469 dead transitions. [2023-08-24 10:39:18,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 469 transitions, 4597 flow [2023-08-24 10:39:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 10:39:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 10:39:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 6209 transitions. [2023-08-24 10:39:18,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24927734061345752 [2023-08-24 10:39:18,424 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 6209 transitions. [2023-08-24 10:39:18,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 6209 transitions. [2023-08-24 10:39:18,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:18,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 6209 transitions. [2023-08-24 10:39:18,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 119.40384615384616) internal successors, (6209), 52 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 479.0) internal successors, (25387), 53 states have internal predecessors, (25387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,490 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 479.0) internal successors, (25387), 53 states have internal predecessors, (25387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,490 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 934 flow. Second operand 52 states and 6209 transitions. [2023-08-24 10:39:18,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 469 transitions, 4597 flow [2023-08-24 10:39:18,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 469 transitions, 3852 flow, removed 322 selfloop flow, removed 11 redundant places. [2023-08-24 10:39:18,533 INFO L231 Difference]: Finished difference. Result has 153 places, 223 transitions, 2575 flow [2023-08-24 10:39:18,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2575, PETRI_PLACES=153, PETRI_TRANSITIONS=223} [2023-08-24 10:39:18,533 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2023-08-24 10:39:18,534 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 223 transitions, 2575 flow [2023-08-24 10:39:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:18,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:18,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:18,539 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 10:39:18,735 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 10:39:18,736 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 10:39:18,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash -312330190, now seen corresponding path program 2 times [2023-08-24 10:39:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:18,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637306420] [2023-08-24 10:39:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:18,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:18,955 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 10:39:18,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:18,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637306420] [2023-08-24 10:39:18,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637306420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:18,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146296111] [2023-08-24 10:39:18,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:39:18,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:18,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:18,961 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 10:39:18,965 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 10:39:19,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:39:19,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:19,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 10:39:19,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:19,449 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-24 10:39:19,449 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 327 treesize of output 306 [2023-08-24 10:39:19,612 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 10:39:19,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:26,908 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 10:39:26,909 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 7 [2023-08-24 10:39:26,916 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 10:39:26,971 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-24 10:39:26,972 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 96 treesize of output 91 [2023-08-24 10:39:27,127 INFO L322 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2023-08-24 10:39:27,127 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 29 [2023-08-24 10:39:27,415 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 10:39:27,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146296111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:27,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:27,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 19 [2023-08-24 10:39:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650984788] [2023-08-24 10:39:27,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:27,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 10:39:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 10:39:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-24 10:39:27,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 479 [2023-08-24 10:39:27,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 223 transitions, 2575 flow. Second operand has 19 states, 19 states have (on average 122.52631578947368) internal successors, (2328), 19 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:27,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:27,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 479 [2023-08-24 10:39:27,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:32,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:39:33,355 INFO L124 PetriNetUnfolderBase]: 695/1309 cut-off events. [2023-08-24 10:39:33,355 INFO L125 PetriNetUnfolderBase]: For 8342/8342 co-relation queries the response was YES. [2023-08-24 10:39:33,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6940 conditions, 1309 events. 695/1309 cut-off events. For 8342/8342 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7214 event pairs, 131 based on Foata normal form. 15/1323 useless extension candidates. Maximal degree in co-relation 6736. Up to 894 conditions per place. [2023-08-24 10:39:33,369 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 202 selfloop transitions, 102 changer transitions 17/321 dead transitions. [2023-08-24 10:39:33,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 321 transitions, 3714 flow [2023-08-24 10:39:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 10:39:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 10:39:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4133 transitions. [2023-08-24 10:39:33,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2614664389194661 [2023-08-24 10:39:33,376 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4133 transitions. [2023-08-24 10:39:33,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4133 transitions. [2023-08-24 10:39:33,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:33,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4133 transitions. [2023-08-24 10:39:33,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 125.24242424242425) internal successors, (4133), 33 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 479.0) internal successors, (16286), 34 states have internal predecessors, (16286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,396 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 479.0) internal successors, (16286), 34 states have internal predecessors, (16286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,396 INFO L175 Difference]: Start difference. First operand has 153 places, 223 transitions, 2575 flow. Second operand 33 states and 4133 transitions. [2023-08-24 10:39:33,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 321 transitions, 3714 flow [2023-08-24 10:39:33,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 321 transitions, 3095 flow, removed 269 selfloop flow, removed 12 redundant places. [2023-08-24 10:39:33,457 INFO L231 Difference]: Finished difference. Result has 173 places, 238 transitions, 2455 flow [2023-08-24 10:39:33,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2455, PETRI_PLACES=173, PETRI_TRANSITIONS=238} [2023-08-24 10:39:33,459 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 152 predicate places. [2023-08-24 10:39:33,459 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 238 transitions, 2455 flow [2023-08-24 10:39:33,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 122.52631578947368) internal successors, (2328), 19 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:33,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:33,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:33,471 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 10:39:33,665 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 10:39:33,665 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 10:39:33,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1084227362, now seen corresponding path program 3 times [2023-08-24 10:39:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:33,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805963272] [2023-08-24 10:39:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:33,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:33,864 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 10:39:33,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805963272] [2023-08-24 10:39:33,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805963272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067399337] [2023-08-24 10:39:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:39:33,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:33,866 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 10:39:33,869 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 10:39:34,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:39:34,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:34,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 10:39:34,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:34,500 INFO L322 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-08-24 10:39:34,500 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 41 treesize of output 29 [2023-08-24 10:39:34,529 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 10:39:34,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:34,865 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:34,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 414 treesize of output 422 [2023-08-24 10:39:42,374 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 10:39:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067399337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:39:42,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:39:42,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-24 10:39:42,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801147592] [2023-08-24 10:39:42,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:39:42,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 10:39:42,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:39:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 10:39:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-08-24 10:39:42,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 479 [2023-08-24 10:39:42,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 238 transitions, 2455 flow. Second operand has 20 states, 20 states have (on average 122.4) internal successors, (2448), 20 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:42,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:39:42,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 479 [2023-08-24 10:39:42,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:39:43,904 INFO L124 PetriNetUnfolderBase]: 779/1514 cut-off events. [2023-08-24 10:39:43,905 INFO L125 PetriNetUnfolderBase]: For 6420/6420 co-relation queries the response was YES. [2023-08-24 10:39:43,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7106 conditions, 1514 events. 779/1514 cut-off events. For 6420/6420 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8964 event pairs, 84 based on Foata normal form. 6/1519 useless extension candidates. Maximal degree in co-relation 6974. Up to 799 conditions per place. [2023-08-24 10:39:43,922 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 192 selfloop transitions, 154 changer transitions 8/354 dead transitions. [2023-08-24 10:39:43,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 354 transitions, 3825 flow [2023-08-24 10:39:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 10:39:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 10:39:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4001 transitions. [2023-08-24 10:39:43,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26102557411273486 [2023-08-24 10:39:43,928 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4001 transitions. [2023-08-24 10:39:43,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4001 transitions. [2023-08-24 10:39:43,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:39:43,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4001 transitions. [2023-08-24 10:39:43,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 125.03125) internal successors, (4001), 32 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:43,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 479.0) internal successors, (15807), 33 states have internal predecessors, (15807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:43,972 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 479.0) internal successors, (15807), 33 states have internal predecessors, (15807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:43,972 INFO L175 Difference]: Start difference. First operand has 173 places, 238 transitions, 2455 flow. Second operand 32 states and 4001 transitions. [2023-08-24 10:39:43,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 354 transitions, 3825 flow [2023-08-24 10:39:44,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 354 transitions, 3682 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-24 10:39:44,020 INFO L231 Difference]: Finished difference. Result has 191 places, 273 transitions, 3094 flow [2023-08-24 10:39:44,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3094, PETRI_PLACES=191, PETRI_TRANSITIONS=273} [2023-08-24 10:39:44,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 170 predicate places. [2023-08-24 10:39:44,021 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 273 transitions, 3094 flow [2023-08-24 10:39:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 122.4) internal successors, (2448), 20 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:39:44,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:39:44,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:39:44,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 10:39:44,227 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 10:39:44,227 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 10:39:44,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:39:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1946294360, now seen corresponding path program 4 times [2023-08-24 10:39:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:39:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060403093] [2023-08-24 10:39:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:39:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:39:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:39:44,425 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 10:39:44,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:39:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060403093] [2023-08-24 10:39:44,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060403093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:39:44,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678852564] [2023-08-24 10:39:44,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:39:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:39:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:39:44,427 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 10:39:44,452 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 10:39:44,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:39:44,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:39:44,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-24 10:39:44,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:39:44,573 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 10:39:44,609 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 10:39:44,641 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 10:39:45,129 INFO L322 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2023-08-24 10:39:45,129 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 49 treesize of output 26 [2023-08-24 10:39:45,166 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 10:39:45,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:39:57,887 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:57,887 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 276 treesize of output 168 [2023-08-24 10:39:57,919 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:57,919 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 466 treesize of output 466 [2023-08-24 10:39:57,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:57,963 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 476 treesize of output 400 [2023-08-24 10:39:58,019 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:39:58,020 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 191 treesize of output 205 [2023-08-24 10:40:01,114 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:40:01,418 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 10:40:01,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678852564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:40:01,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:40:01,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 10:40:01,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746177742] [2023-08-24 10:40:01,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:40:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:40:01,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:40:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:40:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=362, Unknown=2, NotChecked=0, Total=462 [2023-08-24 10:40:01,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:40:01,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 273 transitions, 3094 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:01,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:40:01,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:40:01,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:40:22,082 WARN L234 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:40:35,220 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 98 DAG size of output: 52 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:40:36,971 INFO L124 PetriNetUnfolderBase]: 780/1528 cut-off events. [2023-08-24 10:40:36,971 INFO L125 PetriNetUnfolderBase]: For 8000/8000 co-relation queries the response was YES. [2023-08-24 10:40:36,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7981 conditions, 1528 events. 780/1528 cut-off events. For 8000/8000 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9175 event pairs, 35 based on Foata normal form. 8/1535 useless extension candidates. Maximal degree in co-relation 7832. Up to 810 conditions per place. [2023-08-24 10:40:36,986 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 181 selfloop transitions, 196 changer transitions 14/391 dead transitions. [2023-08-24 10:40:36,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 391 transitions, 4386 flow [2023-08-24 10:40:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 10:40:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 10:40:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4954 transitions. [2023-08-24 10:40:36,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24624714186300825 [2023-08-24 10:40:36,994 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4954 transitions. [2023-08-24 10:40:36,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4954 transitions. [2023-08-24 10:40:36,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:40:36,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4954 transitions. [2023-08-24 10:40:37,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 117.95238095238095) internal successors, (4954), 42 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:37,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 479.0) internal successors, (20597), 43 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:37,040 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 479.0) internal successors, (20597), 43 states have internal predecessors, (20597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:37,040 INFO L175 Difference]: Start difference. First operand has 191 places, 273 transitions, 3094 flow. Second operand 42 states and 4954 transitions. [2023-08-24 10:40:37,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 391 transitions, 4386 flow [2023-08-24 10:40:37,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 391 transitions, 4126 flow, removed 27 selfloop flow, removed 26 redundant places. [2023-08-24 10:40:37,104 INFO L231 Difference]: Finished difference. Result has 205 places, 292 transitions, 3463 flow [2023-08-24 10:40:37,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3463, PETRI_PLACES=205, PETRI_TRANSITIONS=292} [2023-08-24 10:40:37,106 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-08-24 10:40:37,107 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 292 transitions, 3463 flow [2023-08-24 10:40:37,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:37,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:40:37,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:40:37,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 10:40:37,313 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 10:40:37,313 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 10:40:37,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:40:37,314 INFO L85 PathProgramCache]: Analyzing trace with hash -781360374, now seen corresponding path program 5 times [2023-08-24 10:40:37,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:40:37,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103004940] [2023-08-24 10:40:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:40:37,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:40:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:40:37,643 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 10:40:37,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:40:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103004940] [2023-08-24 10:40:37,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103004940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:40:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54466443] [2023-08-24 10:40:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:40:37,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:40:37,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:40:37,645 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 10:40:37,649 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 10:40:37,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:40:37,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:40:37,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:40:37,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:40:37,797 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 10:40:37,840 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 10:40:37,875 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 10:40:38,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:40:38,351 INFO L322 Elim1Store]: treesize reduction 15, result has 31.8 percent of original size [2023-08-24 10:40:38,351 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 41 treesize of output 24 [2023-08-24 10:40:38,381 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 10:40:38,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:40:43,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:40:43,572 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 276 treesize of output 168 [2023-08-24 10:40:43,602 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:40:43,603 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 986 treesize of output 906 [2023-08-24 10:40:43,651 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:40:43,651 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 221 treesize of output 181 [2023-08-24 10:40:44,060 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:40:44,061 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 166 treesize of output 186 [2023-08-24 10:40:45,199 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 10:40:45,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54466443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:40:45,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:40:45,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 10:40:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882140536] [2023-08-24 10:40:45,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:40:45,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:40:45,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:40:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:40:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=367, Unknown=2, NotChecked=0, Total=462 [2023-08-24 10:40:45,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:40:45,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 292 transitions, 3463 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:40:45,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:40:45,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:40:45,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:40:53,531 WARN L234 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:41:01,946 WARN L234 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 61 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:41:08,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:41:14,264 INFO L124 PetriNetUnfolderBase]: 774/1512 cut-off events. [2023-08-24 10:41:14,264 INFO L125 PetriNetUnfolderBase]: For 7944/7944 co-relation queries the response was YES. [2023-08-24 10:41:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8331 conditions, 1512 events. 774/1512 cut-off events. For 7944/7944 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9026 event pairs, 24 based on Foata normal form. 6/1517 useless extension candidates. Maximal degree in co-relation 8174. Up to 682 conditions per place. [2023-08-24 10:41:14,277 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 187 selfloop transitions, 198 changer transitions 14/399 dead transitions. [2023-08-24 10:41:14,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 399 transitions, 4680 flow [2023-08-24 10:41:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 10:41:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 10:41:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4489 transitions. [2023-08-24 10:41:14,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24662125041204264 [2023-08-24 10:41:14,284 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4489 transitions. [2023-08-24 10:41:14,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4489 transitions. [2023-08-24 10:41:14,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:41:14,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4489 transitions. [2023-08-24 10:41:14,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 118.13157894736842) internal successors, (4489), 38 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:14,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:14,304 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:14,304 INFO L175 Difference]: Start difference. First operand has 205 places, 292 transitions, 3463 flow. Second operand 38 states and 4489 transitions. [2023-08-24 10:41:14,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 399 transitions, 4680 flow [2023-08-24 10:41:14,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 399 transitions, 4272 flow, removed 61 selfloop flow, removed 35 redundant places. [2023-08-24 10:41:14,378 INFO L231 Difference]: Finished difference. Result has 206 places, 297 transitions, 3535 flow [2023-08-24 10:41:14,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3535, PETRI_PLACES=206, PETRI_TRANSITIONS=297} [2023-08-24 10:41:14,379 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2023-08-24 10:41:14,379 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 297 transitions, 3535 flow [2023-08-24 10:41:14,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:14,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:41:14,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:41:14,390 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 10:41:14,590 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 10:41:14,591 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 10:41:14,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:41:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2055866568, now seen corresponding path program 6 times [2023-08-24 10:41:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:41:14,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295291143] [2023-08-24 10:41:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:41:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:41:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:41:14,831 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 10:41:14,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:41:14,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295291143] [2023-08-24 10:41:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295291143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:41:14,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909276064] [2023-08-24 10:41:14,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:41:14,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:41:14,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:41:14,833 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 10:41:14,835 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 10:41:14,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:41:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:41:14,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:41:14,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:41:14,999 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 10:41:15,045 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 10:41:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:41:15,138 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 10:41:15,392 INFO L322 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-08-24 10:41:15,392 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 327 treesize of output 306 [2023-08-24 10:41:15,531 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 10:41:15,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:41:20,111 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:20,111 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 273 treesize of output 165 [2023-08-24 10:41:20,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:20,143 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 1306 treesize of output 1130 [2023-08-24 10:41:20,183 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:20,183 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 260 treesize of output 200 [2023-08-24 10:41:20,230 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:41:20,230 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 171 treesize of output 185 [2023-08-24 10:41:24,635 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 10:41:24,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909276064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:41:24,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:41:24,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 10:41:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903452603] [2023-08-24 10:41:24,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:41:24,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:41:24,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:41:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:41:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=379, Unknown=3, NotChecked=0, Total=462 [2023-08-24 10:41:24,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:41:24,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 297 transitions, 3535 flow. Second operand has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:41:24,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:41:24,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:41:24,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:41:39,829 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 10:41:40,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:41:52,575 WARN L234 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 106 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:42:02,485 WARN L234 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 122 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:42:10,058 WARN L234 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 117 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:42:14,978 INFO L124 PetriNetUnfolderBase]: 943/1805 cut-off events. [2023-08-24 10:42:14,978 INFO L125 PetriNetUnfolderBase]: For 9724/9724 co-relation queries the response was YES. [2023-08-24 10:42:14,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10131 conditions, 1805 events. 943/1805 cut-off events. For 9724/9724 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10975 event pairs, 69 based on Foata normal form. 31/1835 useless extension candidates. Maximal degree in co-relation 9956. Up to 422 conditions per place. [2023-08-24 10:42:14,991 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 156 selfloop transitions, 197 changer transitions 137/490 dead transitions. [2023-08-24 10:42:14,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 490 transitions, 5974 flow [2023-08-24 10:42:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 10:42:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 10:42:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4517 transitions. [2023-08-24 10:42:14,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24815954290737283 [2023-08-24 10:42:14,997 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4517 transitions. [2023-08-24 10:42:14,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4517 transitions. [2023-08-24 10:42:14,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:14,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4517 transitions. [2023-08-24 10:42:15,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 118.86842105263158) internal successors, (4517), 38 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:15,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:15,015 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 479.0) internal successors, (18681), 39 states have internal predecessors, (18681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:15,016 INFO L175 Difference]: Start difference. First operand has 206 places, 297 transitions, 3535 flow. Second operand 38 states and 4517 transitions. [2023-08-24 10:42:15,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 490 transitions, 5974 flow [2023-08-24 10:42:15,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 490 transitions, 5679 flow, removed 11 selfloop flow, removed 27 redundant places. [2023-08-24 10:42:15,090 INFO L231 Difference]: Finished difference. Result has 222 places, 266 transitions, 3649 flow [2023-08-24 10:42:15,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3649, PETRI_PLACES=222, PETRI_TRANSITIONS=266} [2023-08-24 10:42:15,091 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 201 predicate places. [2023-08-24 10:42:15,092 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 266 transitions, 3649 flow [2023-08-24 10:42:15,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 115.18181818181819) internal successors, (2534), 22 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:15,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:15,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:15,098 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 10:42:15,297 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 10:42:15,297 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 10:42:15,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1543115367, now seen corresponding path program 2 times [2023-08-24 10:42:15,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:15,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066421686] [2023-08-24 10:42:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:15,512 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 10:42:15,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:15,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066421686] [2023-08-24 10:42:15,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066421686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:15,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589326563] [2023-08-24 10:42:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:42:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:15,517 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 10:42:15,521 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 10:42:15,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:42:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:15,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:42:15,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:15,835 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 10:42:15,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:15,942 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 10:42:16,028 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 10:42:16,143 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 10:42:16,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589326563] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:16,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:16,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 10:42:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61943103] [2023-08-24 10:42:16,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:16,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:42:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:42:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:42:16,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:42:16,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 266 transitions, 3649 flow. Second operand has 11 states, 11 states have (on average 175.27272727272728) internal successors, (1928), 11 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:16,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:16,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:42:16,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:17,123 INFO L124 PetriNetUnfolderBase]: 673/1266 cut-off events. [2023-08-24 10:42:17,124 INFO L125 PetriNetUnfolderBase]: For 9149/9149 co-relation queries the response was YES. [2023-08-24 10:42:17,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 1266 events. 673/1266 cut-off events. For 9149/9149 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 6995 event pairs, 65 based on Foata normal form. 24/1289 useless extension candidates. Maximal degree in co-relation 7972. Up to 297 conditions per place. [2023-08-24 10:42:17,132 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 166 selfloop transitions, 173 changer transitions 0/339 dead transitions. [2023-08-24 10:42:17,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 339 transitions, 4840 flow [2023-08-24 10:42:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:42:17,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:42:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2863 transitions. [2023-08-24 10:42:17,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37356471816283926 [2023-08-24 10:42:17,139 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2863 transitions. [2023-08-24 10:42:17,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2863 transitions. [2023-08-24 10:42:17,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:17,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2863 transitions. [2023-08-24 10:42:17,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 178.9375) internal successors, (2863), 16 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:17,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 479.0) internal successors, (8143), 17 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:17,148 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 479.0) internal successors, (8143), 17 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:17,148 INFO L175 Difference]: Start difference. First operand has 222 places, 266 transitions, 3649 flow. Second operand 16 states and 2863 transitions. [2023-08-24 10:42:17,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 339 transitions, 4840 flow [2023-08-24 10:42:17,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 339 transitions, 4546 flow, removed 97 selfloop flow, removed 26 redundant places. [2023-08-24 10:42:17,220 INFO L231 Difference]: Finished difference. Result has 195 places, 278 transitions, 3923 flow [2023-08-24 10:42:17,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3923, PETRI_PLACES=195, PETRI_TRANSITIONS=278} [2023-08-24 10:42:17,221 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-08-24 10:42:17,221 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 278 transitions, 3923 flow [2023-08-24 10:42:17,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.27272727272728) internal successors, (1928), 11 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:17,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:17,221 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:17,232 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 10:42:17,427 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 10:42:17,428 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 10:42:17,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1049373469, now seen corresponding path program 3 times [2023-08-24 10:42:17,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:17,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977469693] [2023-08-24 10:42:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:17,659 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 10:42:17,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977469693] [2023-08-24 10:42:17,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977469693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557827309] [2023-08-24 10:42:17,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:42:17,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:17,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:17,665 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 10:42:17,719 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 10:42:17,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:42:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:17,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:42:17,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:17,982 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 10:42:17,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:18,083 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 10:42:18,153 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 10:42:18,316 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 10:42:18,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557827309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:18,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:18,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 10:42:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121812432] [2023-08-24 10:42:18,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:42:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:42:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:42:18,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:42:18,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 278 transitions, 3923 flow. Second operand has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:18,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:18,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:42:18,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:19,568 INFO L124 PetriNetUnfolderBase]: 798/1526 cut-off events. [2023-08-24 10:42:19,568 INFO L125 PetriNetUnfolderBase]: For 11341/11341 co-relation queries the response was YES. [2023-08-24 10:42:19,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9755 conditions, 1526 events. 798/1526 cut-off events. For 11341/11341 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8935 event pairs, 101 based on Foata normal form. 44/1569 useless extension candidates. Maximal degree in co-relation 9696. Up to 469 conditions per place. [2023-08-24 10:42:19,577 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 233 selfloop transitions, 186 changer transitions 0/419 dead transitions. [2023-08-24 10:42:19,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 419 transitions, 6062 flow [2023-08-24 10:42:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 10:42:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 10:42:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3600 transitions. [2023-08-24 10:42:19,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757828810020877 [2023-08-24 10:42:19,580 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3600 transitions. [2023-08-24 10:42:19,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3600 transitions. [2023-08-24 10:42:19,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:19,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3600 transitions. [2023-08-24 10:42:19,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 180.0) internal successors, (3600), 20 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:19,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 479.0) internal successors, (10059), 21 states have internal predecessors, (10059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:19,588 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 479.0) internal successors, (10059), 21 states have internal predecessors, (10059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:19,588 INFO L175 Difference]: Start difference. First operand has 195 places, 278 transitions, 3923 flow. Second operand 20 states and 3600 transitions. [2023-08-24 10:42:19,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 419 transitions, 6062 flow [2023-08-24 10:42:19,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 419 transitions, 5795 flow, removed 38 selfloop flow, removed 6 redundant places. [2023-08-24 10:42:19,650 INFO L231 Difference]: Finished difference. Result has 221 places, 335 transitions, 5218 flow [2023-08-24 10:42:19,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5218, PETRI_PLACES=221, PETRI_TRANSITIONS=335} [2023-08-24 10:42:19,651 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-08-24 10:42:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 335 transitions, 5218 flow [2023-08-24 10:42:19,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:19,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:19,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:19,656 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 10:42:19,851 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 10:42:19,852 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 10:42:19,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash -129503277, now seen corresponding path program 4 times [2023-08-24 10:42:19,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:19,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642669799] [2023-08-24 10:42:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:19,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:20,110 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 10:42:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642669799] [2023-08-24 10:42:20,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642669799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279187185] [2023-08-24 10:42:20,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:42:20,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:20,112 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 10:42:20,115 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 10:42:20,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:42:20,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:20,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:42:20,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:20,415 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 10:42:20,492 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 10:42:20,534 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 10:42:20,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:20,728 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 10:42:20,993 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 10:42:21,142 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 10:42:21,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279187185] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:21,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:21,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 10:42:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289342949] [2023-08-24 10:42:21,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:21,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:42:21,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:42:21,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:42:21,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:42:21,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 335 transitions, 5218 flow. Second operand has 12 states, 12 states have (on average 175.0) internal successors, (2100), 12 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 10:42:21,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:21,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:42:21,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:22,273 INFO L124 PetriNetUnfolderBase]: 790/1483 cut-off events. [2023-08-24 10:42:22,273 INFO L125 PetriNetUnfolderBase]: For 12550/12550 co-relation queries the response was YES. [2023-08-24 10:42:22,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10233 conditions, 1483 events. 790/1483 cut-off events. For 12550/12550 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8464 event pairs, 101 based on Foata normal form. 14/1496 useless extension candidates. Maximal degree in co-relation 10162. Up to 469 conditions per place. [2023-08-24 10:42:22,284 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 217 selfloop transitions, 177 changer transitions 0/394 dead transitions. [2023-08-24 10:42:22,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 394 transitions, 6231 flow [2023-08-24 10:42:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 10:42:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 10:42:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3057 transitions. [2023-08-24 10:42:22,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37541446641286996 [2023-08-24 10:42:22,288 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3057 transitions. [2023-08-24 10:42:22,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3057 transitions. [2023-08-24 10:42:22,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:22,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3057 transitions. [2023-08-24 10:42:22,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 179.8235294117647) internal successors, (3057), 17 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:22,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:22,296 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:22,296 INFO L175 Difference]: Start difference. First operand has 221 places, 335 transitions, 5218 flow. Second operand 17 states and 3057 transitions. [2023-08-24 10:42:22,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 394 transitions, 6231 flow [2023-08-24 10:42:22,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 394 transitions, 6015 flow, removed 71 selfloop flow, removed 3 redundant places. [2023-08-24 10:42:22,411 INFO L231 Difference]: Finished difference. Result has 235 places, 334 transitions, 5341 flow [2023-08-24 10:42:22,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=4865, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5341, PETRI_PLACES=235, PETRI_TRANSITIONS=334} [2023-08-24 10:42:22,412 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 214 predicate places. [2023-08-24 10:42:22,412 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 334 transitions, 5341 flow [2023-08-24 10:42:22,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.0) internal successors, (2100), 12 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 10:42:22,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:22,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:22,417 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 10:42:22,613 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 10:42:22,613 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 10:42:22,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:22,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1246381685, now seen corresponding path program 5 times [2023-08-24 10:42:22,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:22,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306827162] [2023-08-24 10:42:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:22,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:22,910 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 10:42:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306827162] [2023-08-24 10:42:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306827162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385448889] [2023-08-24 10:42:22,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:42:22,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:22,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:22,913 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 10:42:22,939 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 10:42:23,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:42:23,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:23,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:42:23,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:23,255 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 10:42:23,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:23,347 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 10:42:23,450 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 10:42:23,607 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 10:42:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385448889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:23,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:23,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 10:42:23,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145052678] [2023-08-24 10:42:23,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:23,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:42:23,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:42:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:42:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:42:23,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 334 transitions, 5341 flow. Second operand has 11 states, 11 states have (on average 175.36363636363637) internal successors, (1929), 11 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:23,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:23,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:42:23,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:24,853 INFO L124 PetriNetUnfolderBase]: 810/1535 cut-off events. [2023-08-24 10:42:24,853 INFO L125 PetriNetUnfolderBase]: For 13038/13038 co-relation queries the response was YES. [2023-08-24 10:42:24,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10801 conditions, 1535 events. 810/1535 cut-off events. For 13038/13038 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8935 event pairs, 72 based on Foata normal form. 24/1558 useless extension candidates. Maximal degree in co-relation 10728. Up to 517 conditions per place. [2023-08-24 10:42:24,866 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 200 selfloop transitions, 205 changer transitions 0/405 dead transitions. [2023-08-24 10:42:24,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 405 transitions, 6745 flow [2023-08-24 10:42:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 10:42:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 10:42:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2868 transitions. [2023-08-24 10:42:24,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3742171189979123 [2023-08-24 10:42:24,869 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2868 transitions. [2023-08-24 10:42:24,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2868 transitions. [2023-08-24 10:42:24,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:24,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2868 transitions. [2023-08-24 10:42:24,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 179.25) internal successors, (2868), 16 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:24,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 479.0) internal successors, (8143), 17 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:24,878 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 479.0) internal successors, (8143), 17 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:24,878 INFO L175 Difference]: Start difference. First operand has 235 places, 334 transitions, 5341 flow. Second operand 16 states and 2868 transitions. [2023-08-24 10:42:24,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 405 transitions, 6745 flow [2023-08-24 10:42:25,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 405 transitions, 6445 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-24 10:42:25,008 INFO L231 Difference]: Finished difference. Result has 244 places, 347 transitions, 5767 flow [2023-08-24 10:42:25,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5767, PETRI_PLACES=244, PETRI_TRANSITIONS=347} [2023-08-24 10:42:25,008 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 223 predicate places. [2023-08-24 10:42:25,009 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 347 transitions, 5767 flow [2023-08-24 10:42:25,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.36363636363637) internal successors, (1929), 11 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:25,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:25,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:25,015 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 10:42:25,215 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 10:42:25,215 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 10:42:25,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:25,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1134942297, now seen corresponding path program 6 times [2023-08-24 10:42:25,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:25,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799874213] [2023-08-24 10:42:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:25,506 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 10:42:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799874213] [2023-08-24 10:42:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799874213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:25,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088982234] [2023-08-24 10:42:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:42:25,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:25,508 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 10:42:25,533 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 10:42:26,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:42:26,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:26,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:42:26,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:26,222 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:42:26,222 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 275 treesize of output 260 [2023-08-24 10:42:26,405 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 10:42:26,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:26,535 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 10:42:26,664 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 10:42:26,825 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 10:42:26,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088982234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:26,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:26,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 10:42:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500046570] [2023-08-24 10:42:26,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 10:42:26,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 10:42:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 10:42:26,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:42:26,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 347 transitions, 5767 flow. Second operand has 11 states, 11 states have (on average 175.0909090909091) internal successors, (1926), 11 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:26,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:26,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:42:26,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:28,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:42:28,847 INFO L124 PetriNetUnfolderBase]: 916/1700 cut-off events. [2023-08-24 10:42:28,847 INFO L125 PetriNetUnfolderBase]: For 16016/16016 co-relation queries the response was YES. [2023-08-24 10:42:28,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12433 conditions, 1700 events. 916/1700 cut-off events. For 16016/16016 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 9930 event pairs, 113 based on Foata normal form. 14/1713 useless extension candidates. Maximal degree in co-relation 12357. Up to 810 conditions per place. [2023-08-24 10:42:28,863 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 229 selfloop transitions, 214 changer transitions 0/443 dead transitions. [2023-08-24 10:42:28,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 443 transitions, 7699 flow [2023-08-24 10:42:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 10:42:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 10:42:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2522 transitions. [2023-08-24 10:42:28,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37608112138383537 [2023-08-24 10:42:28,867 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2522 transitions. [2023-08-24 10:42:28,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2522 transitions. [2023-08-24 10:42:28,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:28,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2522 transitions. [2023-08-24 10:42:28,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 180.14285714285714) internal successors, (2522), 14 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:28,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 479.0) internal successors, (7185), 15 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:28,874 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 479.0) internal successors, (7185), 15 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:28,874 INFO L175 Difference]: Start difference. First operand has 244 places, 347 transitions, 5767 flow. Second operand 14 states and 2522 transitions. [2023-08-24 10:42:28,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 443 transitions, 7699 flow [2023-08-24 10:42:29,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 443 transitions, 7437 flow, removed 98 selfloop flow, removed 12 redundant places. [2023-08-24 10:42:29,050 INFO L231 Difference]: Finished difference. Result has 251 places, 383 transitions, 6843 flow [2023-08-24 10:42:29,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=5508, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6843, PETRI_PLACES=251, PETRI_TRANSITIONS=383} [2023-08-24 10:42:29,051 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 230 predicate places. [2023-08-24 10:42:29,051 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 383 transitions, 6843 flow [2023-08-24 10:42:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 175.0909090909091) internal successors, (1926), 11 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:29,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:29,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:29,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 10:42:29,257 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 10:42:29,258 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 10:42:29,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1981148253, now seen corresponding path program 7 times [2023-08-24 10:42:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522615774] [2023-08-24 10:42:29,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:29,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:29,467 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 10:42:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:29,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522615774] [2023-08-24 10:42:29,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522615774] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031913497] [2023-08-24 10:42:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:42:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:29,469 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 10:42:29,471 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 10:42:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:29,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 10:42:29,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:29,845 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 10:42:29,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:29,934 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 10:42:30,038 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 10:42:30,264 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 10:42:30,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031913497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:30,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:30,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 10:42:30,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406072089] [2023-08-24 10:42:30,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:30,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:42:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:42:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:42:30,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:42:30,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 383 transitions, 6843 flow. Second operand has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:30,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:30,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:42:30,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:31,263 INFO L124 PetriNetUnfolderBase]: 887/1653 cut-off events. [2023-08-24 10:42:31,263 INFO L125 PetriNetUnfolderBase]: For 18454/18454 co-relation queries the response was YES. [2023-08-24 10:42:31,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12644 conditions, 1653 events. 887/1653 cut-off events. For 18454/18454 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9577 event pairs, 117 based on Foata normal form. 32/1684 useless extension candidates. Maximal degree in co-relation 12571. Up to 810 conditions per place. [2023-08-24 10:42:31,278 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 222 selfloop transitions, 212 changer transitions 0/434 dead transitions. [2023-08-24 10:42:31,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 434 transitions, 7912 flow [2023-08-24 10:42:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 10:42:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 10:42:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3044 transitions. [2023-08-24 10:42:31,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37381800319292646 [2023-08-24 10:42:31,282 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3044 transitions. [2023-08-24 10:42:31,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3044 transitions. [2023-08-24 10:42:31,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:31,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3044 transitions. [2023-08-24 10:42:31,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 179.05882352941177) internal successors, (3044), 17 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:31,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:31,290 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 479.0) internal successors, (8622), 18 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:31,290 INFO L175 Difference]: Start difference. First operand has 251 places, 383 transitions, 6843 flow. Second operand 17 states and 3044 transitions. [2023-08-24 10:42:31,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 434 transitions, 7912 flow [2023-08-24 10:42:31,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 434 transitions, 7692 flow, removed 50 selfloop flow, removed 6 redundant places. [2023-08-24 10:42:31,473 INFO L231 Difference]: Finished difference. Result has 263 places, 380 transitions, 7017 flow [2023-08-24 10:42:31,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7017, PETRI_PLACES=263, PETRI_TRANSITIONS=380} [2023-08-24 10:42:31,474 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 242 predicate places. [2023-08-24 10:42:31,474 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 380 transitions, 7017 flow [2023-08-24 10:42:31,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 175.33333333333334) internal successors, (2104), 12 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:31,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:31,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:31,487 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 10:42:31,680 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 10:42:31,681 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 10:42:31,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1349395830, now seen corresponding path program 7 times [2023-08-24 10:42:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:31,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122817656] [2023-08-24 10:42:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:31,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:32,486 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 10:42:32,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122817656] [2023-08-24 10:42:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122817656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868280333] [2023-08-24 10:42:32,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:42:32,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:32,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:32,489 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 10:42:32,514 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 10:42:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:32,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-24 10:42:32,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:33,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:42:33,149 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-24 10:42:33,150 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 43 treesize of output 24 [2023-08-24 10:42:33,182 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 10:42:33,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:33,955 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:42:33,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 426 [2023-08-24 10:42:37,229 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 10:42:37,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868280333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:37,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:37,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-24 10:42:37,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232781745] [2023-08-24 10:42:37,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:37,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 10:42:37,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 10:42:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2023-08-24 10:42:37,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 479 [2023-08-24 10:42:37,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 380 transitions, 7017 flow. Second operand has 28 states, 28 states have (on average 121.75) internal successors, (3409), 28 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:37,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:37,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 479 [2023-08-24 10:42:37,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:40,923 INFO L124 PetriNetUnfolderBase]: 995/1894 cut-off events. [2023-08-24 10:42:40,923 INFO L125 PetriNetUnfolderBase]: For 21864/21864 co-relation queries the response was YES. [2023-08-24 10:42:40,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14751 conditions, 1894 events. 995/1894 cut-off events. For 21864/21864 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11524 event pairs, 68 based on Foata normal form. 3/1896 useless extension candidates. Maximal degree in co-relation 14676. Up to 479 conditions per place. [2023-08-24 10:42:40,937 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 254 selfloop transitions, 213 changer transitions 48/515 dead transitions. [2023-08-24 10:42:40,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 515 transitions, 9208 flow [2023-08-24 10:42:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 10:42:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 10:42:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4121 transitions. [2023-08-24 10:42:40,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26070728158410833 [2023-08-24 10:42:40,941 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4121 transitions. [2023-08-24 10:42:40,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4121 transitions. [2023-08-24 10:42:40,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:40,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4121 transitions. [2023-08-24 10:42:40,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 124.87878787878788) internal successors, (4121), 33 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:40,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 479.0) internal successors, (16286), 34 states have internal predecessors, (16286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:40,955 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 479.0) internal successors, (16286), 34 states have internal predecessors, (16286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:40,955 INFO L175 Difference]: Start difference. First operand has 263 places, 380 transitions, 7017 flow. Second operand 33 states and 4121 transitions. [2023-08-24 10:42:40,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 515 transitions, 9208 flow [2023-08-24 10:42:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 515 transitions, 8860 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-08-24 10:42:41,098 INFO L231 Difference]: Finished difference. Result has 290 places, 397 transitions, 7540 flow [2023-08-24 10:42:41,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=6712, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7540, PETRI_PLACES=290, PETRI_TRANSITIONS=397} [2023-08-24 10:42:41,098 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 269 predicate places. [2023-08-24 10:42:41,098 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 397 transitions, 7540 flow [2023-08-24 10:42:41,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 121.75) internal successors, (3409), 28 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:41,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:41,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:41,104 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 10:42:41,300 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 10:42:41,301 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 10:42:41,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1742695416, now seen corresponding path program 8 times [2023-08-24 10:42:41,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:41,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022575014] [2023-08-24 10:42:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:42:41,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:41,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022575014] [2023-08-24 10:42:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022575014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:41,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494204604] [2023-08-24 10:42:41,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:42:41,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:41,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:41,529 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 10:42:41,555 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 10:42:41,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:42:41,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:41,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 10:42:41,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:42,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:42:42,030 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 327 treesize of output 327 [2023-08-24 10:42:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:42:42,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:45,214 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-24 10:42:45,214 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 66 treesize of output 85 [2023-08-24 10:42:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 10:42:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494204604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:45,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:45,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-08-24 10:42:45,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136514212] [2023-08-24 10:42:45,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:45,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 10:42:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 10:42:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-24 10:42:45,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 479 [2023-08-24 10:42:45,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 397 transitions, 7540 flow. Second operand has 17 states, 17 states have (on average 136.2941176470588) internal successors, (2317), 17 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:45,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:45,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 479 [2023-08-24 10:42:45,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:42:50,767 INFO L124 PetriNetUnfolderBase]: 1092/2038 cut-off events. [2023-08-24 10:42:50,767 INFO L125 PetriNetUnfolderBase]: For 28688/28688 co-relation queries the response was YES. [2023-08-24 10:42:50,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16628 conditions, 2038 events. 1092/2038 cut-off events. For 28688/28688 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 12544 event pairs, 71 based on Foata normal form. 7/2044 useless extension candidates. Maximal degree in co-relation 16547. Up to 498 conditions per place. [2023-08-24 10:42:50,785 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 285 selfloop transitions, 229 changer transitions 6/520 dead transitions. [2023-08-24 10:42:50,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 520 transitions, 9973 flow [2023-08-24 10:42:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 10:42:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 10:42:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2817 transitions. [2023-08-24 10:42:50,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2940501043841336 [2023-08-24 10:42:50,789 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2817 transitions. [2023-08-24 10:42:50,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2817 transitions. [2023-08-24 10:42:50,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:42:50,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2817 transitions. [2023-08-24 10:42:50,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 140.85) internal successors, (2817), 20 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 479.0) internal successors, (10059), 21 states have internal predecessors, (10059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,797 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 479.0) internal successors, (10059), 21 states have internal predecessors, (10059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,797 INFO L175 Difference]: Start difference. First operand has 290 places, 397 transitions, 7540 flow. Second operand 20 states and 2817 transitions. [2023-08-24 10:42:50,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 520 transitions, 9973 flow [2023-08-24 10:42:50,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 520 transitions, 9871 flow, removed 47 selfloop flow, removed 7 redundant places. [2023-08-24 10:42:50,983 INFO L231 Difference]: Finished difference. Result has 288 places, 443 transitions, 9069 flow [2023-08-24 10:42:50,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=7458, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9069, PETRI_PLACES=288, PETRI_TRANSITIONS=443} [2023-08-24 10:42:50,984 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 267 predicate places. [2023-08-24 10:42:50,984 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 443 transitions, 9069 flow [2023-08-24 10:42:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 136.2941176470588) internal successors, (2317), 17 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:50,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:42:50,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:42:50,990 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 10:42:51,187 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 10:42:51,187 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 10:42:51,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:42:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash -40009013, now seen corresponding path program 9 times [2023-08-24 10:42:51,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:42:51,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675177755] [2023-08-24 10:42:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:42:51,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:42:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:42:51,365 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 10:42:51,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:42:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675177755] [2023-08-24 10:42:51,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675177755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:42:51,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477979827] [2023-08-24 10:42:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:42:51,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:42:51,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:42:51,369 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 10:42:51,392 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 10:42:51,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:42:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:42:51,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 10:42:51,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:42:51,585 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 10:42:51,618 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 10:42:51,652 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 10:42:51,991 INFO L322 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2023-08-24 10:42:51,992 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 329 treesize of output 304 [2023-08-24 10:42:52,096 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 10:42:52,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:42:57,982 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 10:42:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477979827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:42:57,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:42:57,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 23 [2023-08-24 10:42:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889050661] [2023-08-24 10:42:57,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:42:57,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 10:42:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:42:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 10:42:57,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-24 10:42:57,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:42:57,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 443 transitions, 9069 flow. Second operand has 23 states, 23 states have (on average 114.8695652173913) internal successors, (2642), 23 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:42:57,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:42:57,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:42:57,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:43:00,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:43:10,249 WARN L539 Checker$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 10:43:18,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:43:22,398 WARN L539 Checker$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 10:43:25,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:43:35,519 WARN L539 Checker$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 10:43:37,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:43:41,596 INFO L124 PetriNetUnfolderBase]: 1839/3405 cut-off events. [2023-08-24 10:43:41,596 INFO L125 PetriNetUnfolderBase]: For 59360/59360 co-relation queries the response was YES. [2023-08-24 10:43:41,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29447 conditions, 3405 events. 1839/3405 cut-off events. For 59360/59360 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23020 event pairs, 94 based on Foata normal form. 46/3450 useless extension candidates. Maximal degree in co-relation 29363. Up to 918 conditions per place. [2023-08-24 10:43:41,623 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 390 selfloop transitions, 502 changer transitions 23/915 dead transitions. [2023-08-24 10:43:41,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 915 transitions, 17677 flow [2023-08-24 10:43:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-24 10:43:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-24 10:43:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 6480 transitions. [2023-08-24 10:43:41,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25052192066805845 [2023-08-24 10:43:41,630 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 6480 transitions. [2023-08-24 10:43:41,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 6480 transitions. [2023-08-24 10:43:41,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:43:41,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 6480 transitions. [2023-08-24 10:43:41,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 120.0) internal successors, (6480), 54 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:41,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 479.0) internal successors, (26345), 55 states have internal predecessors, (26345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:41,654 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 479.0) internal successors, (26345), 55 states have internal predecessors, (26345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:41,654 INFO L175 Difference]: Start difference. First operand has 288 places, 443 transitions, 9069 flow. Second operand 54 states and 6480 transitions. [2023-08-24 10:43:41,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 915 transitions, 17677 flow [2023-08-24 10:43:42,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 915 transitions, 17377 flow, removed 97 selfloop flow, removed 6 redundant places. [2023-08-24 10:43:42,080 INFO L231 Difference]: Finished difference. Result has 359 places, 692 transitions, 15699 flow [2023-08-24 10:43:42,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=8819, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=15699, PETRI_PLACES=359, PETRI_TRANSITIONS=692} [2023-08-24 10:43:42,081 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 338 predicate places. [2023-08-24 10:43:42,081 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 692 transitions, 15699 flow [2023-08-24 10:43:42,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 114.8695652173913) internal successors, (2642), 23 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:42,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:43:42,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:43:42,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-24 10:43:42,282 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 10:43:42,282 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 10:43:42,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:43:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash 831543575, now seen corresponding path program 10 times [2023-08-24 10:43:42,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:43:42,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059939385] [2023-08-24 10:43:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:43:42,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:43:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:43:42,546 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 10:43:42,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:43:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059939385] [2023-08-24 10:43:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059939385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:43:42,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629442428] [2023-08-24 10:43:42,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:43:42,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:43:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:43:42,549 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 10:43:42,556 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 10:43:42,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:43:42,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:43:42,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 10:43:42,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:43:42,782 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 10:43:42,813 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 10:43:42,868 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 10:43:43,269 INFO L322 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2023-08-24 10:43:43,269 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 310 [2023-08-24 10:43:43,338 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 10:43:43,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:43:49,717 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 10:43:49,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629442428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:43:49,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:43:49,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-08-24 10:43:49,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743948592] [2023-08-24 10:43:49,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:43:49,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:43:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:43:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:43:49,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=451, Unknown=1, NotChecked=0, Total=552 [2023-08-24 10:43:49,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:43:49,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 692 transitions, 15699 flow. Second operand has 24 states, 24 states have (on average 114.875) internal successors, (2757), 24 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:43:49,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:43:49,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:43:49,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:43:52,711 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 10:44:07,114 WARN L234 SmtUtils]: Spent 14.19s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:44:15,562 WARN L234 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:44:21,939 WARN L234 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:44:23,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:44:30,780 WARN L539 Checker$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 10:44:46,749 WARN L234 SmtUtils]: Spent 10.57s on a formula simplification. DAG size of input: 105 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:45:06,470 WARN L234 SmtUtils]: Spent 16.62s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:45:25,316 WARN L234 SmtUtils]: Spent 18.65s on a formula simplification. DAG size of input: 136 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:45:36,024 WARN L234 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 146 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:45:42,078 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:45:53,560 WARN L234 SmtUtils]: Spent 10.22s on a formula simplification. DAG size of input: 95 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:46:10,204 WARN L234 SmtUtils]: Spent 16.50s on a formula simplification. DAG size of input: 106 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:46:13,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:46:24,455 WARN L234 SmtUtils]: Spent 11.15s on a formula simplification. DAG size of input: 143 DAG size of output: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:46:28,776 WARN L539 Checker$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 10:46:40,581 WARN L234 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 132 DAG size of output: 117 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:46:44,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:46:49,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:46:56,203 INFO L124 PetriNetUnfolderBase]: 2526/4633 cut-off events. [2023-08-24 10:46:56,203 INFO L125 PetriNetUnfolderBase]: For 107645/107645 co-relation queries the response was YES. [2023-08-24 10:46:56,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44090 conditions, 4633 events. 2526/4633 cut-off events. For 107645/107645 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32917 event pairs, 96 based on Foata normal form. 26/4658 useless extension candidates. Maximal degree in co-relation 43981. Up to 1332 conditions per place. [2023-08-24 10:46:56,247 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 534 selfloop transitions, 661 changer transitions 27/1222 dead transitions. [2023-08-24 10:46:56,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 1222 transitions, 26085 flow [2023-08-24 10:46:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-24 10:46:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-24 10:46:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 7673 transitions. [2023-08-24 10:46:56,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25029358037578286 [2023-08-24 10:46:56,255 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 7673 transitions. [2023-08-24 10:46:56,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 7673 transitions. [2023-08-24 10:46:56,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:46:56,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 7673 transitions. [2023-08-24 10:46:56,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 119.890625) internal successors, (7673), 64 states have internal predecessors, (7673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:56,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 479.0) internal successors, (31135), 65 states have internal predecessors, (31135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:56,282 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 479.0) internal successors, (31135), 65 states have internal predecessors, (31135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:56,282 INFO L175 Difference]: Start difference. First operand has 359 places, 692 transitions, 15699 flow. Second operand 64 states and 7673 transitions. [2023-08-24 10:46:56,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 1222 transitions, 26085 flow [2023-08-24 10:46:57,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1222 transitions, 24946 flow, removed 507 selfloop flow, removed 12 redundant places. [2023-08-24 10:46:57,279 INFO L231 Difference]: Finished difference. Result has 427 places, 922 transitions, 22474 flow [2023-08-24 10:46:57,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=14944, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=22474, PETRI_PLACES=427, PETRI_TRANSITIONS=922} [2023-08-24 10:46:57,280 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 406 predicate places. [2023-08-24 10:46:57,280 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 922 transitions, 22474 flow [2023-08-24 10:46:57,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.875) internal successors, (2757), 24 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:57,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:46:57,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:46:57,289 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 10:46:57,486 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 10:46:57,487 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 10:46:57,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:46:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1494672745, now seen corresponding path program 11 times [2023-08-24 10:46:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:46:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005459262] [2023-08-24 10:46:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:46:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:46:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:46:57,654 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 10:46:57,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:46:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005459262] [2023-08-24 10:46:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005459262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:46:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152965948] [2023-08-24 10:46:57,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:46:57,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:46:57,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:46:57,657 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 10:46:57,667 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 10:46:57,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:46:57,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:46:57,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 10:46:57,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:46:57,978 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 10:46:58,023 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 10:46:58,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:46:58,234 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 255 treesize of output 239 [2023-08-24 10:46:58,561 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 10:46:58,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152965948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:46:58,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:46:58,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 10:46:58,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726792108] [2023-08-24 10:46:58,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:46:58,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 10:46:58,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:46:58,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 10:46:58,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-08-24 10:46:58,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 479 [2023-08-24 10:46:58,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 922 transitions, 22474 flow. Second operand has 14 states, 14 states have (on average 175.07142857142858) internal successors, (2451), 14 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:46:58,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:46:58,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 479 [2023-08-24 10:46:58,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:47:00,618 INFO L124 PetriNetUnfolderBase]: 2482/4576 cut-off events. [2023-08-24 10:47:00,619 INFO L125 PetriNetUnfolderBase]: For 117523/117523 co-relation queries the response was YES. [2023-08-24 10:47:00,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44902 conditions, 4576 events. 2482/4576 cut-off events. For 117523/117523 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32591 event pairs, 507 based on Foata normal form. 6/4581 useless extension candidates. Maximal degree in co-relation 44776. Up to 2715 conditions per place. [2023-08-24 10:47:00,665 INFO L140 encePairwiseOnDemand]: 473/479 looper letters, 796 selfloop transitions, 186 changer transitions 0/982 dead transitions. [2023-08-24 10:47:00,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 982 transitions, 25138 flow [2023-08-24 10:47:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 10:47:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 10:47:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3204 transitions. [2023-08-24 10:47:00,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37160751565762007 [2023-08-24 10:47:00,668 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3204 transitions. [2023-08-24 10:47:00,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3204 transitions. [2023-08-24 10:47:00,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:47:00,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3204 transitions. [2023-08-24 10:47:00,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 178.0) internal successors, (3204), 18 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:00,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 479.0) internal successors, (9101), 19 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:00,674 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 479.0) internal successors, (9101), 19 states have internal predecessors, (9101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:00,674 INFO L175 Difference]: Start difference. First operand has 427 places, 922 transitions, 22474 flow. Second operand 18 states and 3204 transitions. [2023-08-24 10:47:00,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 982 transitions, 25138 flow [2023-08-24 10:47:01,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 982 transitions, 24142 flow, removed 292 selfloop flow, removed 26 redundant places. [2023-08-24 10:47:01,824 INFO L231 Difference]: Finished difference. Result has 420 places, 929 transitions, 22157 flow [2023-08-24 10:47:01,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=21531, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22157, PETRI_PLACES=420, PETRI_TRANSITIONS=929} [2023-08-24 10:47:01,825 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 399 predicate places. [2023-08-24 10:47:01,825 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 929 transitions, 22157 flow [2023-08-24 10:47:01,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 175.07142857142858) internal successors, (2451), 14 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:01,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:47:01,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:47:01,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-24 10:47:02,026 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 10:47:02,026 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 10:47:02,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:47:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash 272746119, now seen corresponding path program 12 times [2023-08-24 10:47:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:47:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189490540] [2023-08-24 10:47:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:47:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:47:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:47:02,417 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 10:47:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:47:02,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189490540] [2023-08-24 10:47:02,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189490540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:47:02,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970466240] [2023-08-24 10:47:02,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:47:02,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:47:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:47:02,421 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 10:47:02,448 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 10:47:02,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 10:47:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:47:02,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 10:47:02,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:47:03,018 INFO L322 Elim1Store]: treesize reduction 25, result has 52.8 percent of original size [2023-08-24 10:47:03,019 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 335 [2023-08-24 10:47:03,229 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 10:47:03,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:47:08,709 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:47:08,709 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 354 treesize of output 315 [2023-08-24 10:47:16,357 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 10:47:16,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970466240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:47:16,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:47:16,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-08-24 10:47:16,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217844530] [2023-08-24 10:47:16,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:47:16,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 10:47:16,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:47:16,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 10:47:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-24 10:47:16,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 479 [2023-08-24 10:47:16,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 929 transitions, 22157 flow. Second operand has 21 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:47:16,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:47:16,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 479 [2023-08-24 10:47:16,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:47:28,712 WARN L234 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 123 DAG size of output: 123 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:47:54,896 WARN L234 SmtUtils]: Spent 25.82s on a formula simplification. DAG size of input: 158 DAG size of output: 158 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:47:57,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:47:59,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:01,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:03,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:05,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:10,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:12,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:21,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:22,645 INFO L124 PetriNetUnfolderBase]: 2825/5263 cut-off events. [2023-08-24 10:48:22,645 INFO L125 PetriNetUnfolderBase]: For 136411/136411 co-relation queries the response was YES. [2023-08-24 10:48:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50852 conditions, 5263 events. 2825/5263 cut-off events. For 136411/136411 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 38901 event pairs, 317 based on Foata normal form. 10/5272 useless extension candidates. Maximal degree in co-relation 50732. Up to 3149 conditions per place. [2023-08-24 10:48:22,702 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 626 selfloop transitions, 528 changer transitions 14/1168 dead transitions. [2023-08-24 10:48:22,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1168 transitions, 28281 flow [2023-08-24 10:48:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 10:48:22,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 10:48:22,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3891 transitions. [2023-08-24 10:48:22,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2801094233676481 [2023-08-24 10:48:22,705 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3891 transitions. [2023-08-24 10:48:22,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3891 transitions. [2023-08-24 10:48:22,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:48:22,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3891 transitions. [2023-08-24 10:48:22,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 134.17241379310346) internal successors, (3891), 29 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:22,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:22,713 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:22,713 INFO L175 Difference]: Start difference. First operand has 420 places, 929 transitions, 22157 flow. Second operand 29 states and 3891 transitions. [2023-08-24 10:48:22,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1168 transitions, 28281 flow [2023-08-24 10:48:23,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1168 transitions, 28127 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-08-24 10:48:23,905 INFO L231 Difference]: Finished difference. Result has 453 places, 1066 transitions, 27215 flow [2023-08-24 10:48:23,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=22007, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27215, PETRI_PLACES=453, PETRI_TRANSITIONS=1066} [2023-08-24 10:48:23,906 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 432 predicate places. [2023-08-24 10:48:23,907 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1066 transitions, 27215 flow [2023-08-24 10:48:23,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:23,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:48:23,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:48:23,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 10:48:24,116 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 10:48:24,117 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 10:48:24,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:48:24,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1893375401, now seen corresponding path program 13 times [2023-08-24 10:48:24,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:48:24,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790837264] [2023-08-24 10:48:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:48:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:48:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:48:24,345 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 10:48:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:48:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790837264] [2023-08-24 10:48:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790837264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:48:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364022100] [2023-08-24 10:48:24,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:48:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:48:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:48:24,346 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 10:48:24,375 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 10:48:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:48:24,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 10:48:24,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:48:24,605 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 10:48:24,654 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 10:48:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:48:24,854 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 34 treesize of output 30 [2023-08-24 10:48:25,155 INFO L322 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2023-08-24 10:48:25,156 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 296 [2023-08-24 10:48:25,331 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 10:48:25,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:48:31,950 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 10:48:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364022100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:48:31,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:48:31,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 24 [2023-08-24 10:48:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713846803] [2023-08-24 10:48:31,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:48:31,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 10:48:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:48:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 10:48:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=443, Unknown=1, NotChecked=0, Total=552 [2023-08-24 10:48:31,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 479 [2023-08-24 10:48:31,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1066 transitions, 27215 flow. Second operand has 24 states, 24 states have (on average 114.83333333333333) internal successors, (2756), 24 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:48:31,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:48:31,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 479 [2023-08-24 10:48:31,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:48:41,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:48:52,728 WARN L234 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 149 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:48:55,556 WARN L539 Checker$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 10:49:00,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:49:02,148 WARN L539 Checker$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 10:49:04,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:49:06,690 WARN L539 Checker$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 10:49:12,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:49:14,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:49:18,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:49:20,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:49:22,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:49:24,553 WARN L539 Checker$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 10:49:36,170 WARN L234 SmtUtils]: Spent 9.59s on a formula simplification. DAG size of input: 120 DAG size of output: 110 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:49:36,314 INFO L124 PetriNetUnfolderBase]: 3240/6006 cut-off events. [2023-08-24 10:49:36,314 INFO L125 PetriNetUnfolderBase]: For 182038/182038 co-relation queries the response was YES. [2023-08-24 10:49:36,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62534 conditions, 6006 events. 3240/6006 cut-off events. For 182038/182038 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 45456 event pairs, 140 based on Foata normal form. 8/6013 useless extension candidates. Maximal degree in co-relation 62402. Up to 1722 conditions per place. [2023-08-24 10:49:36,385 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 515 selfloop transitions, 902 changer transitions 12/1429 dead transitions. [2023-08-24 10:49:36,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1429 transitions, 35612 flow [2023-08-24 10:49:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 10:49:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 10:49:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5756 transitions. [2023-08-24 10:49:36,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25034794711203895 [2023-08-24 10:49:36,390 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5756 transitions. [2023-08-24 10:49:36,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5756 transitions. [2023-08-24 10:49:36,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:49:36,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5756 transitions. [2023-08-24 10:49:36,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 119.91666666666667) internal successors, (5756), 48 states have internal predecessors, (5756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:49:36,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 479.0) internal successors, (23471), 49 states have internal predecessors, (23471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:49:36,403 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 479.0) internal successors, (23471), 49 states have internal predecessors, (23471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:49:36,403 INFO L175 Difference]: Start difference. First operand has 453 places, 1066 transitions, 27215 flow. Second operand 48 states and 5756 transitions. [2023-08-24 10:49:36,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1429 transitions, 35612 flow [2023-08-24 10:49:38,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1429 transitions, 35217 flow, removed 135 selfloop flow, removed 11 redundant places. [2023-08-24 10:49:38,437 INFO L231 Difference]: Finished difference. Result has 502 places, 1228 transitions, 33454 flow [2023-08-24 10:49:38,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=26863, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=745, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=33454, PETRI_PLACES=502, PETRI_TRANSITIONS=1228} [2023-08-24 10:49:38,445 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 481 predicate places. [2023-08-24 10:49:38,446 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1228 transitions, 33454 flow [2023-08-24 10:49:38,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 114.83333333333333) internal successors, (2756), 24 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:49:38,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:49:38,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:49:38,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 10:49:38,675 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 10:49:38,675 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 10:49:38,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:49:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1034379165, now seen corresponding path program 14 times [2023-08-24 10:49:38,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:49:38,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936744868] [2023-08-24 10:49:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:49:38,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:49:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:49:38,995 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 10:49:38,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:49:38,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936744868] [2023-08-24 10:49:38,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936744868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:49:38,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007203707] [2023-08-24 10:49:38,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:49:38,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:49:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:49:38,996 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 10:49:39,020 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 10:49:39,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:49:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:49:39,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 10:49:39,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:49:39,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:49:39,787 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 53 treesize of output 47 [2023-08-24 10:49:39,825 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 10:49:39,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:49:45,756 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:49:45,757 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 350 treesize of output 311 [2023-08-24 10:49:53,971 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 10:49:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007203707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:49:53,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:49:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 21 [2023-08-24 10:49:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948715443] [2023-08-24 10:49:53,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:49:53,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 10:49:53,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:49:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 10:49:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-08-24 10:49:53,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 479 [2023-08-24 10:49:53,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1228 transitions, 33454 flow. Second operand has 21 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:49:53,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:49:53,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 479 [2023-08-24 10:49:53,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:50:19,493 WARN L234 SmtUtils]: Spent 18.16s on a formula simplification. DAG size of input: 142 DAG size of output: 134 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:50:21,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:50:23,855 WARN L539 Checker$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 10:50:54,936 WARN L234 SmtUtils]: Spent 28.21s on a formula simplification. DAG size of input: 143 DAG size of output: 135 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:50:57,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 10:51:02,696 WARN L539 Checker$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 10:51:06,728 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 10:51:08,327 INFO L124 PetriNetUnfolderBase]: 3227/6042 cut-off events. [2023-08-24 10:51:08,327 INFO L125 PetriNetUnfolderBase]: For 205480/205480 co-relation queries the response was YES. [2023-08-24 10:51:08,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66485 conditions, 6042 events. 3227/6042 cut-off events. For 205480/205480 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 46191 event pairs, 340 based on Foata normal form. 8/6049 useless extension candidates. Maximal degree in co-relation 66342. Up to 3036 conditions per place. [2023-08-24 10:51:08,455 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 672 selfloop transitions, 642 changer transitions 13/1327 dead transitions. [2023-08-24 10:51:08,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 1327 transitions, 36823 flow [2023-08-24 10:51:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 10:51:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 10:51:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3882 transitions. [2023-08-24 10:51:08,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.279461521848679 [2023-08-24 10:51:08,458 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3882 transitions. [2023-08-24 10:51:08,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3882 transitions. [2023-08-24 10:51:08,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:51:08,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3882 transitions. [2023-08-24 10:51:08,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 133.86206896551724) internal successors, (3882), 29 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:51:08,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:51:08,466 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 479.0) internal successors, (14370), 30 states have internal predecessors, (14370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:51:08,466 INFO L175 Difference]: Start difference. First operand has 502 places, 1228 transitions, 33454 flow. Second operand 29 states and 3882 transitions. [2023-08-24 10:51:08,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 1327 transitions, 36823 flow [2023-08-24 10:51:10,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1327 transitions, 36272 flow, removed 205 selfloop flow, removed 16 redundant places. [2023-08-24 10:51:10,625 INFO L231 Difference]: Finished difference. Result has 517 places, 1231 transitions, 34338 flow [2023-08-24 10:51:10,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=32946, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=636, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=34338, PETRI_PLACES=517, PETRI_TRANSITIONS=1231} [2023-08-24 10:51:10,626 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 496 predicate places. [2023-08-24 10:51:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 1231 transitions, 34338 flow [2023-08-24 10:51:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 130.0952380952381) internal successors, (2732), 21 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:51:10,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:51:10,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:51:10,635 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 10:51:10,832 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 10:51:10,832 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 10:51:10,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:51:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1075609575, now seen corresponding path program 15 times [2023-08-24 10:51:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:51:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282341480] [2023-08-24 10:51:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:51:10,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:51:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:51:11,041 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 10:51:11,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:51:11,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282341480] [2023-08-24 10:51:11,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282341480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:51:11,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196988730] [2023-08-24 10:51:11,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:51:11,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:51:11,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:51:11,045 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 10:51:11,049 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 10:51:11,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 10:51:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:51:11,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-24 10:51:11,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:51:11,320 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 10:51:11,360 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 10:51:11,399 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 10:51:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:51:11,493 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 10:51:12,045 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-24 10:51:12,045 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 73 treesize of output 40 [2023-08-24 10:51:12,089 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 10:51:12,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-08-24 10:51:13,245 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 10:51:13,252 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:51:13,257 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 10:51:13,283 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 10:51:13,452 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 10:51:13,453 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-2-4-6-1 context. [2023-08-24 10:51:13,454 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 10:51:13,454 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 10:51:13,454 INFO L445 BasicCegarLoop]: Path program histogram: [15, 7, 6, 1] [2023-08-24 10:51:13,457 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 10:51:13,457 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 10:51:13,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 10:51:13 BasicIcfg [2023-08-24 10:51:13,459 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 10:51:13,460 INFO L158 Benchmark]: Toolchain (without parser) took 830474.71ms. Allocated memory was 362.8MB in the beginning and 809.5MB in the end (delta: 446.7MB). Free memory was 339.3MB in the beginning and 393.3MB in the end (delta: -54.0MB). Peak memory consumption was 517.5MB. Max. memory is 16.0GB. [2023-08-24 10:51:13,460 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 339.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:51:13,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.51ms. Allocated memory is still 362.8MB. Free memory was 338.8MB in the beginning and 326.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 10:51:13,460 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.24ms. Allocated memory is still 362.8MB. Free memory was 326.9MB in the beginning and 324.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:51:13,460 INFO L158 Benchmark]: Boogie Preprocessor took 48.52ms. Allocated memory is still 362.8MB. Free memory was 324.9MB in the beginning and 323.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:51:13,461 INFO L158 Benchmark]: RCFGBuilder took 510.65ms. Allocated memory is still 362.8MB. Free memory was 323.3MB in the beginning and 303.9MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 10:51:13,461 INFO L158 Benchmark]: TraceAbstraction took 829642.50ms. Allocated memory was 362.8MB in the beginning and 809.5MB in the end (delta: 446.7MB). Free memory was 302.9MB in the beginning and 393.3MB in the end (delta: -90.4MB). Peak memory consumption was 481.8MB. Max. memory is 16.0GB. [2023-08-24 10:51:13,462 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 362.8MB. Free memory is still 339.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 220.51ms. Allocated memory is still 362.8MB. Free memory was 338.8MB in the beginning and 326.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.24ms. Allocated memory is still 362.8MB. Free memory was 326.9MB in the beginning and 324.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.52ms. Allocated memory is still 362.8MB. Free memory was 324.9MB in the beginning and 323.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 510.65ms. Allocated memory is still 362.8MB. Free memory was 323.3MB in the beginning and 303.9MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 829642.50ms. Allocated memory was 362.8MB in the beginning and 809.5MB in the end (delta: 446.7MB). Free memory was 302.9MB in the beginning and 393.3MB in the end (delta: -90.4MB). Peak memory consumption was 481.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.4s, 199 PlacesBefore, 21 PlacesAfterwards, 213 TransitionsBefore, 17 TransitionsAfterwards, 5492 CoEnabledTransitionPairs, 7 FixpointIterations, 66 TrivialSequentialCompositions, 115 ConcurrentSequentialCompositions, 18 TrivialYvCompositions, 39 ConcurrentYvCompositions, 18 ChoiceCompositions, 256 TotalNumberOfCompositions, 5294 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5265, independent: 5258, independent conditional: 0, independent unconditional: 5258, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3362, independent: 3358, independent conditional: 0, independent unconditional: 3358, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5265, independent: 1900, independent conditional: 0, independent unconditional: 1900, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 3362, unknown conditional: 0, unknown unconditional: 3362] , 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: 107]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-2-4-6-1 context. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-2-4-6-1 context. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-13-2-4-6-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 314 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: 829.4s, OverallIterations: 29, TraceHistogramMax: 3, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 665.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.6s, HoareTripleCheckerStatistics: 218 mSolverCounterUnknown, 3619 SdHoareTripleChecker+Valid, 174.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3619 mSDsluCounter, 852 SdHoareTripleChecker+Invalid, 172.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 200 IncrementalHoareTripleChecker+Unchecked, 728 mSDsCounter, 863 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13441 IncrementalHoareTripleChecker+Invalid, 14722 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 863 mSolverCounterUnsat, 124 mSDtfsCounter, 13441 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1512 GetRequests, 690 SyntacticMatches, 4 SemanticMatches, 818 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9071 ImplicationChecksByTransitivity, 485.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34338occurred in iteration=28, InterpolantAutomatonStates: 695, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 142.5s InterpolantComputationTime, 820 NumberOfCodeBlocks, 820 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1108 ConstructedInterpolants, 35 QuantifiedInterpolants, 25718 SizeOfPredicates, 608 NumberOfNonLiveVariables, 3629 ConjunctsInSsa, 632 ConjunctsInUnsatCore, 70 InterpolantComputations, 7 PerfectInterpolantSequences, 127/270 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