/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 PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:43:39,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:43:39,340 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 13:43:39,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:43:39,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:43:39,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:43:39,378 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:43:39,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:43:39,379 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:43:39,381 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:43:39,381 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:43:39,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:43:39,382 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:43:39,382 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:43:39,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:43:39,382 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:43:39,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:43:39,383 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:43:39,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:43:39,383 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:43:39,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:43:39,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:43:39,384 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:43:39,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:43:39,384 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:43:39,385 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:43:39,385 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:43:39,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:43:39,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:43:39,386 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:43:39,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:43:39,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:43:39,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:43:39,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:43:39,387 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:43:39,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:43:39,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:43:39,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:43:39,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:43:39,716 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:43:39,718 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:43:39,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-24 13:43:40,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:43:41,169 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:43:41,170 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-08-24 13:43:41,177 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033c8bd2f/ddcca8eca94246cabe0ffd6551def75e/FLAG35286a92e [2023-08-24 13:43:41,187 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/033c8bd2f/ddcca8eca94246cabe0ffd6551def75e [2023-08-24 13:43:41,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:43:41,191 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:43:41,192 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:43:41,192 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:43:41,194 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:43:41,195 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,196 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32c271f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41, skipping insertion in model container [2023-08-24 13:43:41,196 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,215 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:43:41,382 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/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-24 13:43:41,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:43:41,404 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:43:41,438 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/chl-chromosome-trans.wvr.c[3034,3047] [2023-08-24 13:43:41,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:43:41,466 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:43:41,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41 WrapperNode [2023-08-24 13:43:41,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:43:41,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:43:41,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:43:41,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:43:41,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,533 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 280 [2023-08-24 13:43:41,534 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:43:41,534 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:43:41,534 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:43:41,535 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:43:41,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,554 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:43:41,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:43:41,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:43:41,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:43:41,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (1/1) ... [2023-08-24 13:43:41,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:43:41,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:41,634 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 13:43:41,652 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 13:43:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:43:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:43:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:43:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:43:41,670 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 13:43:41,670 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 13:43:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 13:43:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 13:43:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 13:43:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 13:43:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:43:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:43:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:43:41,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:43:41,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:43:41,674 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 13:43:41,812 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:43:41,815 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:43:42,304 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:43:42,317 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:43:42,317 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 13:43:42,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:43:42 BoogieIcfgContainer [2023-08-24 13:43:42,322 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:43:42,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:43:42,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:43:42,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:43:42,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:43:41" (1/3) ... [2023-08-24 13:43:42,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b27cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:43:42, skipping insertion in model container [2023-08-24 13:43:42,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:43:41" (2/3) ... [2023-08-24 13:43:42,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b27cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:43:42, skipping insertion in model container [2023-08-24 13:43:42,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:43:42" (3/3) ... [2023-08-24 13:43:42,328 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-08-24 13:43:42,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:43:42,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:43:42,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:43:42,471 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 13:43:42,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 321 transitions, 666 flow [2023-08-24 13:43:42,593 INFO L124 PetriNetUnfolderBase]: 28/318 cut-off events. [2023-08-24 13:43:42,593 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:43:42,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 28/318 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 492 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 247. Up to 2 conditions per place. [2023-08-24 13:43:42,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 321 transitions, 666 flow [2023-08-24 13:43:42,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 308 transitions, 634 flow [2023-08-24 13:43:42,626 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:43:42,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 308 transitions, 634 flow [2023-08-24 13:43:42,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 308 transitions, 634 flow [2023-08-24 13:43:42,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 308 transitions, 634 flow [2023-08-24 13:43:42,709 INFO L124 PetriNetUnfolderBase]: 28/308 cut-off events. [2023-08-24 13:43:42,709 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:43:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 28/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 491 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 247. Up to 2 conditions per place. [2023-08-24 13:43:42,721 INFO L119 LiptonReduction]: Number of co-enabled transitions 15390 [2023-08-24 13:43:51,365 INFO L134 LiptonReduction]: Checked pairs total: 14265 [2023-08-24 13:43:51,365 INFO L136 LiptonReduction]: Total number of compositions: 351 [2023-08-24 13:43:51,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:43:51,382 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;@3452da6f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:43:51,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 13:43:51,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:43:51,392 INFO L124 PetriNetUnfolderBase]: 7/30 cut-off events. [2023-08-24 13:43:51,392 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:43:51,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:51,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:51,393 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:51,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:51,398 INFO L85 PathProgramCache]: Analyzing trace with hash 4830115, now seen corresponding path program 1 times [2023-08-24 13:43:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242112988] [2023-08-24 13:43:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:51,827 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 13:43:51,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:51,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242112988] [2023-08-24 13:43:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242112988] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:51,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:43:51,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:43:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820096804] [2023-08-24 13:43:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:51,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:43:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:51,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:43:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:43:51,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 672 [2023-08-24 13:43:51,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:51,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:51,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 672 [2023-08-24 13:43:51,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:52,034 INFO L124 PetriNetUnfolderBase]: 370/545 cut-off events. [2023-08-24 13:43:52,034 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-24 13:43:52,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 545 events. 370/545 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1530 event pairs, 253 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 936. Up to 543 conditions per place. [2023-08-24 13:43:52,038 INFO L140 encePairwiseOnDemand]: 664/672 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-08-24 13:43:52,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 150 flow [2023-08-24 13:43:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:43:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:43:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2023-08-24 13:43:52,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3993055555555556 [2023-08-24 13:43:52,060 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2023-08-24 13:43:52,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2023-08-24 13:43:52,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:52,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2023-08-24 13:43:52,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 672.0) internal successors, (2688), 4 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 672.0) internal successors, (2688), 4 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,083 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 80 flow. Second operand 3 states and 805 transitions. [2023-08-24 13:43:52,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 150 flow [2023-08-24 13:43:52,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 138 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 13:43:52,089 INFO L231 Difference]: Finished difference. Result has 31 places, 33 transitions, 98 flow [2023-08-24 13:43:52,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=33} [2023-08-24 13:43:52,093 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2023-08-24 13:43:52,093 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 33 transitions, 98 flow [2023-08-24 13:43:52,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:52,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:52,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:43:52,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:52,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:52,096 INFO L85 PathProgramCache]: Analyzing trace with hash -573151743, now seen corresponding path program 1 times [2023-08-24 13:43:52,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:52,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498499101] [2023-08-24 13:43:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:43:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:52,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498499101] [2023-08-24 13:43:52,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498499101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:52,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393960735] [2023-08-24 13:43:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:52,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:52,333 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 13:43:52,363 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 13:43:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:52,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 13:43:52,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:43:52,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:52,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:43:52,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393960735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:52,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:52,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-24 13:43:52,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815525629] [2023-08-24 13:43:52,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 13:43:52,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:52,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 13:43:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:43:52,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 672 [2023-08-24 13:43:52,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 33 transitions, 98 flow. Second operand has 8 states, 8 states have (on average 260.375) internal successors, (2083), 8 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:52,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 672 [2023-08-24 13:43:52,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:52,726 INFO L124 PetriNetUnfolderBase]: 370/554 cut-off events. [2023-08-24 13:43:52,726 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 13:43:52,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 554 events. 370/554 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1530 event pairs, 253 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1106. Up to 543 conditions per place. [2023-08-24 13:43:52,729 INFO L140 encePairwiseOnDemand]: 665/672 looper letters, 27 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2023-08-24 13:43:52,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 218 flow [2023-08-24 13:43:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:43:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:43:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1587 transitions. [2023-08-24 13:43:52,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39360119047619047 [2023-08-24 13:43:52,734 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1587 transitions. [2023-08-24 13:43:52,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1587 transitions. [2023-08-24 13:43:52,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:52,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1587 transitions. [2023-08-24 13:43:52,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 264.5) internal successors, (1587), 6 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 672.0) internal successors, (4704), 7 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,751 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 672.0) internal successors, (4704), 7 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,755 INFO L175 Difference]: Start difference. First operand has 31 places, 33 transitions, 98 flow. Second operand 6 states and 1587 transitions. [2023-08-24 13:43:52,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 218 flow [2023-08-24 13:43:52,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:43:52,758 INFO L231 Difference]: Finished difference. Result has 38 places, 42 transitions, 188 flow [2023-08-24 13:43:52,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=42} [2023-08-24 13:43:52,759 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-24 13:43:52,759 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 42 transitions, 188 flow [2023-08-24 13:43:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 260.375) internal successors, (2083), 8 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:52,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:52,761 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:52,768 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 13:43:52,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:52,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:52,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash -299374539, now seen corresponding path program 2 times [2023-08-24 13:43:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:52,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557023026] [2023-08-24 13:43:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:43:53,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:53,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557023026] [2023-08-24 13:43:53,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557023026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:53,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255582964] [2023-08-24 13:43:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:43:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:53,201 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 13:43:53,232 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 13:43:53,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:43:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:53,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 13:43:53,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:53,393 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:43:53,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255582964] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:53,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:43:53,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-24 13:43:53,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320944706] [2023-08-24 13:43:53,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:53,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:43:53,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:43:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:43:53,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 672 [2023-08-24 13:43:53,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:53,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:53,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 672 [2023-08-24 13:43:53,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:53,635 INFO L124 PetriNetUnfolderBase]: 644/962 cut-off events. [2023-08-24 13:43:53,636 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-24 13:43:53,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 962 events. 644/962 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3401 event pairs, 253 based on Foata normal form. 14/762 useless extension candidates. Maximal degree in co-relation 1928. Up to 555 conditions per place. [2023-08-24 13:43:53,641 INFO L140 encePairwiseOnDemand]: 668/672 looper letters, 69 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-08-24 13:43:53,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 407 flow [2023-08-24 13:43:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:43:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:43:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1179 transitions. [2023-08-24 13:43:53,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43861607142857145 [2023-08-24 13:43:53,644 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1179 transitions. [2023-08-24 13:43:53,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1179 transitions. [2023-08-24 13:43:53,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:53,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1179 transitions. [2023-08-24 13:43:53,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.75) internal successors, (1179), 4 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:53,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:53,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:53,653 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 188 flow. Second operand 4 states and 1179 transitions. [2023-08-24 13:43:53,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 74 transitions, 407 flow [2023-08-24 13:43:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 74 transitions, 383 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-24 13:43:53,656 INFO L231 Difference]: Finished difference. Result has 42 places, 44 transitions, 184 flow [2023-08-24 13:43:53,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=42, PETRI_TRANSITIONS=44} [2023-08-24 13:43:53,657 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-08-24 13:43:53,657 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 44 transitions, 184 flow [2023-08-24 13:43:53,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:53,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:53,658 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:53,672 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 13:43:53,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 13:43:53,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:53,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -17229335, now seen corresponding path program 3 times [2023-08-24 13:43:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108342268] [2023-08-24 13:43:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:43:54,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:54,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108342268] [2023-08-24 13:43:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108342268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118816693] [2023-08-24 13:43:54,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:43:54,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:54,103 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 13:43:54,105 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 13:43:54,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 13:43:54,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:54,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 13:43:54,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:54,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:43:54,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118816693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:54,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:43:54,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-08-24 13:43:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403894844] [2023-08-24 13:43:54,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:43:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:43:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:43:54,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 672 [2023-08-24 13:43:54,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 44 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:54,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:54,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 672 [2023-08-24 13:43:54,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:54,524 INFO L124 PetriNetUnfolderBase]: 758/1124 cut-off events. [2023-08-24 13:43:54,525 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2023-08-24 13:43:54,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2677 conditions, 1124 events. 758/1124 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4203 event pairs, 104 based on Foata normal form. 24/974 useless extension candidates. Maximal degree in co-relation 2598. Up to 775 conditions per place. [2023-08-24 13:43:54,531 INFO L140 encePairwiseOnDemand]: 666/672 looper letters, 63 selfloop transitions, 5 changer transitions 1/69 dead transitions. [2023-08-24 13:43:54,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 392 flow [2023-08-24 13:43:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:43:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:43:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1170 transitions. [2023-08-24 13:43:54,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43526785714285715 [2023-08-24 13:43:54,535 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1170 transitions. [2023-08-24 13:43:54,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1170 transitions. [2023-08-24 13:43:54,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:54,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1170 transitions. [2023-08-24 13:43:54,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 292.5) internal successors, (1170), 4 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:54,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:54,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:54,544 INFO L175 Difference]: Start difference. First operand has 42 places, 44 transitions, 184 flow. Second operand 4 states and 1170 transitions. [2023-08-24 13:43:54,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 392 flow [2023-08-24 13:43:54,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:43:54,548 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 213 flow [2023-08-24 13:43:54,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-24 13:43:54,548 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-24 13:43:54,549 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 213 flow [2023-08-24 13:43:54,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:54,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:54,549 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:54,560 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 13:43:54,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:54,756 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:54,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash -343661567, now seen corresponding path program 4 times [2023-08-24 13:43:54,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:54,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539766671] [2023-08-24 13:43:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:43:54,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:54,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539766671] [2023-08-24 13:43:54,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539766671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:54,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238950907] [2023-08-24 13:43:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:43:54,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:54,939 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 13:43:54,995 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 13:43:55,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:43:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:55,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 13:43:55,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:43:55,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:43:55,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238950907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:55,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:55,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-08-24 13:43:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876300186] [2023-08-24 13:43:55,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 13:43:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 13:43:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-24 13:43:55,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 672 [2023-08-24 13:43:55,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 213 flow. Second operand has 17 states, 17 states have (on average 258.47058823529414) internal successors, (4394), 17 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:55,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:55,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 672 [2023-08-24 13:43:55,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:55,520 INFO L124 PetriNetUnfolderBase]: 758/1127 cut-off events. [2023-08-24 13:43:55,520 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2023-08-24 13:43:55,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2864 conditions, 1127 events. 758/1127 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3901 event pairs, 525 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 2770. Up to 1113 conditions per place. [2023-08-24 13:43:55,526 INFO L140 encePairwiseOnDemand]: 665/672 looper letters, 31 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-08-24 13:43:55,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 329 flow [2023-08-24 13:43:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:43:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:43:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1840 transitions. [2023-08-24 13:43:55,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2023-08-24 13:43:55,531 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1840 transitions. [2023-08-24 13:43:55,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1840 transitions. [2023-08-24 13:43:55,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:55,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1840 transitions. [2023-08-24 13:43:55,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 262.85714285714283) internal successors, (1840), 7 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:55,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 672.0) internal successors, (5376), 8 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:55,541 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 672.0) internal successors, (5376), 8 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:55,541 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 213 flow. Second operand 7 states and 1840 transitions. [2023-08-24 13:43:55,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 329 flow [2023-08-24 13:43:55,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:43:55,544 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 278 flow [2023-08-24 13:43:55,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-08-24 13:43:55,545 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-24 13:43:55,545 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 278 flow [2023-08-24 13:43:55,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 258.47058823529414) internal successors, (4394), 17 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:55,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:55,546 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:55,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:55,753 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:55,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash 438840867, now seen corresponding path program 5 times [2023-08-24 13:43:55,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:55,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421018227] [2023-08-24 13:43:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:43:56,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:56,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421018227] [2023-08-24 13:43:56,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421018227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:56,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:43:56,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:43:56,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913636737] [2023-08-24 13:43:56,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:56,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:43:56,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:43:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:43:56,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 672 [2023-08-24 13:43:56,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:56,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:56,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 672 [2023-08-24 13:43:56,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:56,331 INFO L124 PetriNetUnfolderBase]: 1162/1709 cut-off events. [2023-08-24 13:43:56,331 INFO L125 PetriNetUnfolderBase]: For 1246/1246 co-relation queries the response was YES. [2023-08-24 13:43:56,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4301 conditions, 1709 events. 1162/1709 cut-off events. For 1246/1246 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6625 event pairs, 525 based on Foata normal form. 2/1407 useless extension candidates. Maximal degree in co-relation 4187. Up to 1128 conditions per place. [2023-08-24 13:43:56,341 INFO L140 encePairwiseOnDemand]: 669/672 looper letters, 65 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2023-08-24 13:43:56,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 493 flow [2023-08-24 13:43:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:43:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:43:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 884 transitions. [2023-08-24 13:43:56,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384920634920635 [2023-08-24 13:43:56,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 884 transitions. [2023-08-24 13:43:56,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 884 transitions. [2023-08-24 13:43:56,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:56,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 884 transitions. [2023-08-24 13:43:56,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:56,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 672.0) internal successors, (2688), 4 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:56,411 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 672.0) internal successors, (2688), 4 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:56,411 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 278 flow. Second operand 3 states and 884 transitions. [2023-08-24 13:43:56,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 493 flow [2023-08-24 13:43:56,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 457 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-24 13:43:56,414 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 254 flow [2023-08-24 13:43:56,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-24 13:43:56,415 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-08-24 13:43:56,415 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 254 flow [2023-08-24 13:43:56,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 285.25) internal successors, (1141), 4 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:56,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:56,416 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:56,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 13:43:56,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:56,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1718620290, now seen corresponding path program 1 times [2023-08-24 13:43:56,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:56,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514510124] [2023-08-24 13:43:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:43:56,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:56,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514510124] [2023-08-24 13:43:56,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514510124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:56,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:43:56,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:43:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649102928] [2023-08-24 13:43:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:56,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:43:56,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:43:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:43:56,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-24 13:43:56,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:56,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:56,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-24 13:43:56,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:57,216 INFO L124 PetriNetUnfolderBase]: 2129/3140 cut-off events. [2023-08-24 13:43:57,216 INFO L125 PetriNetUnfolderBase]: For 2750/2750 co-relation queries the response was YES. [2023-08-24 13:43:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8330 conditions, 3140 events. 2129/3140 cut-off events. For 2750/2750 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14474 event pairs, 879 based on Foata normal form. 26/2910 useless extension candidates. Maximal degree in co-relation 8232. Up to 1756 conditions per place. [2023-08-24 13:43:57,233 INFO L140 encePairwiseOnDemand]: 667/672 looper letters, 83 selfloop transitions, 3 changer transitions 17/103 dead transitions. [2023-08-24 13:43:57,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 103 transitions, 671 flow [2023-08-24 13:43:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:43:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:43:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1448 transitions. [2023-08-24 13:43:57,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2023-08-24 13:43:57,238 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1448 transitions. [2023-08-24 13:43:57,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1448 transitions. [2023-08-24 13:43:57,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:57,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1448 transitions. [2023-08-24 13:43:57,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:57,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:57,248 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:57,249 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 254 flow. Second operand 5 states and 1448 transitions. [2023-08-24 13:43:57,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 103 transitions, 671 flow [2023-08-24 13:43:57,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 665 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:43:57,255 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 274 flow [2023-08-24 13:43:57,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-08-24 13:43:57,256 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2023-08-24 13:43:57,256 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 274 flow [2023-08-24 13:43:57,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:57,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:57,269 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:57,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 13:43:57,269 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:57,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:57,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1531362302, now seen corresponding path program 2 times [2023-08-24 13:43:57,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:57,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220872515] [2023-08-24 13:43:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:57,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:43:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220872515] [2023-08-24 13:43:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220872515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275891782] [2023-08-24 13:43:57,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:43:57,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:57,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:57,519 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 13:43:57,544 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 13:43:57,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:43:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:57,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 13:43:57,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:43:57,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:43:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275891782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:57,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:43:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-08-24 13:43:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294849482] [2023-08-24 13:43:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:43:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:43:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 13:43:57,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 672 [2023-08-24 13:43:57,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 285.5) internal successors, (1142), 4 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:57,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:57,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 672 [2023-08-24 13:43:57,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:58,094 INFO L124 PetriNetUnfolderBase]: 1751/2550 cut-off events. [2023-08-24 13:43:58,094 INFO L125 PetriNetUnfolderBase]: For 3420/3420 co-relation queries the response was YES. [2023-08-24 13:43:58,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 2550 events. 1751/2550 cut-off events. For 3420/3420 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10971 event pairs, 679 based on Foata normal form. 72/2622 useless extension candidates. Maximal degree in co-relation 7472. Up to 1504 conditions per place. [2023-08-24 13:43:58,111 INFO L140 encePairwiseOnDemand]: 667/672 looper letters, 77 selfloop transitions, 6 changer transitions 3/86 dead transitions. [2023-08-24 13:43:58,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 575 flow [2023-08-24 13:43:58,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:43:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:43:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1177 transitions. [2023-08-24 13:43:58,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43787202380952384 [2023-08-24 13:43:58,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1177 transitions. [2023-08-24 13:43:58,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1177 transitions. [2023-08-24 13:43:58,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:58,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1177 transitions. [2023-08-24 13:43:58,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.25) internal successors, (1177), 4 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:58,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:58,121 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 672.0) internal successors, (3360), 5 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:58,121 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 274 flow. Second operand 4 states and 1177 transitions. [2023-08-24 13:43:58,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 575 flow [2023-08-24 13:43:58,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 563 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 13:43:58,127 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 292 flow [2023-08-24 13:43:58,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-24 13:43:58,127 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-08-24 13:43:58,128 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 292 flow [2023-08-24 13:43:58,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 285.5) internal successors, (1142), 4 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:58,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:58,128 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:58,139 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 13:43:58,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:58,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:58,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:58,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1001921398, now seen corresponding path program 1 times [2023-08-24 13:43:58,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:58,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406390100] [2023-08-24 13:43:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:58,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:43:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:58,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406390100] [2023-08-24 13:43:58,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406390100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:58,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:43:58,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:43:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719716057] [2023-08-24 13:43:58,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:58,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:43:58,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:43:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:43:58,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-24 13:43:58,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 292 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:58,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:58,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-24 13:43:58,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:59,074 INFO L124 PetriNetUnfolderBase]: 1970/2858 cut-off events. [2023-08-24 13:43:59,075 INFO L125 PetriNetUnfolderBase]: For 4531/4531 co-relation queries the response was YES. [2023-08-24 13:43:59,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8909 conditions, 2858 events. 1970/2858 cut-off events. For 4531/4531 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12620 event pairs, 699 based on Foata normal form. 20/2878 useless extension candidates. Maximal degree in co-relation 8808. Up to 1481 conditions per place. [2023-08-24 13:43:59,095 INFO L140 encePairwiseOnDemand]: 667/672 looper letters, 81 selfloop transitions, 6 changer transitions 16/103 dead transitions. [2023-08-24 13:43:59,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 720 flow [2023-08-24 13:43:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:43:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:43:59,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1448 transitions. [2023-08-24 13:43:59,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2023-08-24 13:43:59,099 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1448 transitions. [2023-08-24 13:43:59,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1448 transitions. [2023-08-24 13:43:59,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:59,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1448 transitions. [2023-08-24 13:43:59,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.6) internal successors, (1448), 5 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:59,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:59,107 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:59,107 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 292 flow. Second operand 5 states and 1448 transitions. [2023-08-24 13:43:59,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 720 flow [2023-08-24 13:43:59,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 103 transitions, 690 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 13:43:59,114 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 322 flow [2023-08-24 13:43:59,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-24 13:43:59,114 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2023-08-24 13:43:59,115 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 322 flow [2023-08-24 13:43:59,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:59,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:59,115 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:59,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 13:43:59,116 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:59,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:59,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1205194648, now seen corresponding path program 2 times [2023-08-24 13:43:59,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:59,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844081009] [2023-08-24 13:43:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:59,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:43:59,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:59,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844081009] [2023-08-24 13:43:59,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844081009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:59,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820292739] [2023-08-24 13:43:59,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:43:59,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:59,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:59,382 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 13:43:59,400 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 13:43:59,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:43:59,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:59,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 13:43:59,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:43:59,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:43:59,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820292739] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:59,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:43:59,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-08-24 13:43:59,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848664414] [2023-08-24 13:43:59,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:59,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:43:59,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:43:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:43:59,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-24 13:43:59,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:59,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:59,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-24 13:43:59,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:00,299 INFO L124 PetriNetUnfolderBase]: 1986/2869 cut-off events. [2023-08-24 13:44:00,299 INFO L125 PetriNetUnfolderBase]: For 5228/5228 co-relation queries the response was YES. [2023-08-24 13:44:00,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2869 events. 1986/2869 cut-off events. For 5228/5228 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12239 event pairs, 267 based on Foata normal form. 36/2905 useless extension candidates. Maximal degree in co-relation 9352. Up to 713 conditions per place. [2023-08-24 13:44:00,330 INFO L140 encePairwiseOnDemand]: 664/672 looper letters, 112 selfloop transitions, 22 changer transitions 4/138 dead transitions. [2023-08-24 13:44:00,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 138 transitions, 1007 flow [2023-08-24 13:44:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:44:00,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:44:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2014 transitions. [2023-08-24 13:44:00,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281462585034014 [2023-08-24 13:44:00,335 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2014 transitions. [2023-08-24 13:44:00,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2014 transitions. [2023-08-24 13:44:00,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:00,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2014 transitions. [2023-08-24 13:44:00,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 287.7142857142857) internal successors, (2014), 7 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:00,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 672.0) internal successors, (5376), 8 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:00,346 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 672.0) internal successors, (5376), 8 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:00,346 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 322 flow. Second operand 7 states and 2014 transitions. [2023-08-24 13:44:00,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 138 transitions, 1007 flow [2023-08-24 13:44:00,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 138 transitions, 989 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 13:44:00,361 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 459 flow [2023-08-24 13:44:00,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=459, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-08-24 13:44:00,362 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 32 predicate places. [2023-08-24 13:44:00,363 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 459 flow [2023-08-24 13:44:00,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:00,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:00,363 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:00,373 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 13:44:00,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:00,570 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:00,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:00,570 INFO L85 PathProgramCache]: Analyzing trace with hash 865371528, now seen corresponding path program 3 times [2023-08-24 13:44:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:00,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855164785] [2023-08-24 13:44:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:00,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855164785] [2023-08-24 13:44:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855164785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495636379] [2023-08-24 13:44:00,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:44:00,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:00,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:00,901 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 13:44:00,911 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 13:44:01,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:44:01,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:01,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 13:44:01,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:01,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:01,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495636379] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:01,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:44:01,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-08-24 13:44:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414436988] [2023-08-24 13:44:01,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:44:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:44:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:44:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 13:44:01,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-24 13:44:01,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:01,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:01,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-24 13:44:01,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:01,742 INFO L124 PetriNetUnfolderBase]: 2074/2993 cut-off events. [2023-08-24 13:44:01,743 INFO L125 PetriNetUnfolderBase]: For 6580/6580 co-relation queries the response was YES. [2023-08-24 13:44:01,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10675 conditions, 2993 events. 2074/2993 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12932 event pairs, 473 based on Foata normal form. 36/3029 useless extension candidates. Maximal degree in co-relation 10570. Up to 1123 conditions per place. [2023-08-24 13:44:01,764 INFO L140 encePairwiseOnDemand]: 666/672 looper letters, 96 selfloop transitions, 21 changer transitions 1/118 dead transitions. [2023-08-24 13:44:01,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 905 flow [2023-08-24 13:44:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:44:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:44:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1447 transitions. [2023-08-24 13:44:01,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43065476190476193 [2023-08-24 13:44:01,768 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1447 transitions. [2023-08-24 13:44:01,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1447 transitions. [2023-08-24 13:44:01,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:01,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1447 transitions. [2023-08-24 13:44:01,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.4) internal successors, (1447), 5 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:01,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:01,776 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:01,776 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 459 flow. Second operand 5 states and 1447 transitions. [2023-08-24 13:44:01,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 905 flow [2023-08-24 13:44:01,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 894 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 13:44:01,803 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 535 flow [2023-08-24 13:44:01,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2023-08-24 13:44:01,804 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2023-08-24 13:44:01,804 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 535 flow [2023-08-24 13:44:01,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:01,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:01,805 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:01,813 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 13:44:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:02,011 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:02,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:02,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1560599208, now seen corresponding path program 4 times [2023-08-24 13:44:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:02,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055987033] [2023-08-24 13:44:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:02,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:44:02,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:02,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055987033] [2023-08-24 13:44:02,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055987033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:44:02,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:44:02,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:44:02,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061198431] [2023-08-24 13:44:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:44:02,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:44:02,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:02,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:44:02,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:44:02,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-24 13:44:02,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:02,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:02,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-24 13:44:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:02,777 INFO L124 PetriNetUnfolderBase]: 2054/2973 cut-off events. [2023-08-24 13:44:02,777 INFO L125 PetriNetUnfolderBase]: For 8659/8659 co-relation queries the response was YES. [2023-08-24 13:44:02,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2973 events. 2054/2973 cut-off events. For 8659/8659 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12676 event pairs, 759 based on Foata normal form. 20/2993 useless extension candidates. Maximal degree in co-relation 11386. Up to 1924 conditions per place. [2023-08-24 13:44:02,798 INFO L140 encePairwiseOnDemand]: 667/672 looper letters, 89 selfloop transitions, 13 changer transitions 18/120 dead transitions. [2023-08-24 13:44:02,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 1006 flow [2023-08-24 13:44:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:44:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:44:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1445 transitions. [2023-08-24 13:44:02,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43005952380952384 [2023-08-24 13:44:02,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1445 transitions. [2023-08-24 13:44:02,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1445 transitions. [2023-08-24 13:44:02,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:02,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1445 transitions. [2023-08-24 13:44:02,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 289.0) internal successors, (1445), 5 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:02,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:02,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 672.0) internal successors, (4032), 6 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:02,809 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 535 flow. Second operand 5 states and 1445 transitions. [2023-08-24 13:44:02,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 1006 flow [2023-08-24 13:44:02,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 120 transitions, 1006 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 13:44:02,844 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 628 flow [2023-08-24 13:44:02,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2023-08-24 13:44:02,845 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2023-08-24 13:44:02,845 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 628 flow [2023-08-24 13:44:02,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:02,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:02,846 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:02,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 13:44:02,846 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:02,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:02,847 INFO L85 PathProgramCache]: Analyzing trace with hash 216509862, now seen corresponding path program 5 times [2023-08-24 13:44:02,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074401018] [2023-08-24 13:44:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-24 13:44:03,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:03,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074401018] [2023-08-24 13:44:03,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074401018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:44:03,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:44:03,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:44:03,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740313884] [2023-08-24 13:44:03,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:44:03,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:44:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:44:03,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:44:03,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 672 [2023-08-24 13:44:03,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 628 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:03,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:03,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 672 [2023-08-24 13:44:03,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:03,593 INFO L124 PetriNetUnfolderBase]: 1978/2850 cut-off events. [2023-08-24 13:44:03,593 INFO L125 PetriNetUnfolderBase]: For 10223/10223 co-relation queries the response was YES. [2023-08-24 13:44:03,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11625 conditions, 2850 events. 1978/2850 cut-off events. For 10223/10223 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12001 event pairs, 673 based on Foata normal form. 36/2886 useless extension candidates. Maximal degree in co-relation 11515. Up to 1666 conditions per place. [2023-08-24 13:44:03,611 INFO L140 encePairwiseOnDemand]: 666/672 looper letters, 109 selfloop transitions, 15 changer transitions 5/129 dead transitions. [2023-08-24 13:44:03,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1118 flow [2023-08-24 13:44:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:44:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:44:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1728 transitions. [2023-08-24 13:44:03,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-24 13:44:03,616 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1728 transitions. [2023-08-24 13:44:03,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1728 transitions. [2023-08-24 13:44:03,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:03,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1728 transitions. [2023-08-24 13:44:03,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:03,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 672.0) internal successors, (4704), 7 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:03,625 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 672.0) internal successors, (4704), 7 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:03,625 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 628 flow. Second operand 6 states and 1728 transitions. [2023-08-24 13:44:03,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1118 flow [2023-08-24 13:44:03,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1100 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 13:44:03,664 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 644 flow [2023-08-24 13:44:03,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=644, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-08-24 13:44:03,664 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-08-24 13:44:03,665 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 644 flow [2023-08-24 13:44:03,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:03,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:03,665 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:03,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 13:44:03,666 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:03,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:03,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1714454368, now seen corresponding path program 1 times [2023-08-24 13:44:03,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:03,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974289619] [2023-08-24 13:44:03,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:03,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:44:06,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:06,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974289619] [2023-08-24 13:44:06,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974289619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:06,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387552030] [2023-08-24 13:44:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:06,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:06,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:06,967 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 13:44:06,972 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 13:44:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:07,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 13:44:07,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:44:07,558 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 13:44:07,995 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:07,995 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 40 treesize of output 40 [2023-08-24 13:44:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:08,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:08,741 WARN L839 $PredicateComparison]: unable to prove that (forall ((~o_4~0.base Int) (v_ArrVal_1075 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1075))) (let ((.cse0 (select .cse2 ~o_2~0.base)) (.cse1 (select (select .cse2 ~o_4~0.base) c_~o_4~0.offset))) (or (< (select .cse0 c_~o_2~0.offset) (+ .cse1 1)) (< |c_thread1Thread1of1ForFork2_#t~mem1#1| (+ (select .cse0 (+ c_~o_2~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) 1)) (< .cse1 (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset)))))) is different from false [2023-08-24 13:44:08,906 INFO L322 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-08-24 13:44:08,907 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 188 treesize of output 233 [2023-08-24 13:44:08,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:08,953 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 156 [2023-08-24 13:44:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387552030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:22,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 12] total 51 [2023-08-24 13:44:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526355515] [2023-08-24 13:44:22,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:22,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-24 13:44:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-24 13:44:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2445, Unknown=1, NotChecked=100, Total=2756 [2023-08-24 13:44:22,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 672 [2023-08-24 13:44:22,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 644 flow. Second operand has 53 states, 53 states have (on average 185.67924528301887) internal successors, (9841), 53 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:22,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:22,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 672 [2023-08-24 13:44:22,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:28,585 INFO L124 PetriNetUnfolderBase]: 4865/7027 cut-off events. [2023-08-24 13:44:28,585 INFO L125 PetriNetUnfolderBase]: For 23424/23424 co-relation queries the response was YES. [2023-08-24 13:44:28,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28152 conditions, 7027 events. 4865/7027 cut-off events. For 23424/23424 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35755 event pairs, 441 based on Foata normal form. 3/7030 useless extension candidates. Maximal degree in co-relation 27993. Up to 2308 conditions per place. [2023-08-24 13:44:28,630 INFO L140 encePairwiseOnDemand]: 652/672 looper letters, 294 selfloop transitions, 188 changer transitions 17/499 dead transitions. [2023-08-24 13:44:28,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 499 transitions, 4646 flow [2023-08-24 13:44:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 13:44:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 13:44:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7151 transitions. [2023-08-24 13:44:28,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28760456885456886 [2023-08-24 13:44:28,650 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7151 transitions. [2023-08-24 13:44:28,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7151 transitions. [2023-08-24 13:44:28,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:28,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7151 transitions. [2023-08-24 13:44:28,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 193.27027027027026) internal successors, (7151), 37 states have internal predecessors, (7151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:28,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 672.0) internal successors, (25536), 38 states have internal predecessors, (25536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:28,704 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 672.0) internal successors, (25536), 38 states have internal predecessors, (25536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:28,704 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 644 flow. Second operand 37 states and 7151 transitions. [2023-08-24 13:44:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 499 transitions, 4646 flow [2023-08-24 13:44:28,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 499 transitions, 4169 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-24 13:44:28,813 INFO L231 Difference]: Finished difference. Result has 126 places, 256 transitions, 2909 flow [2023-08-24 13:44:28,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2909, PETRI_PLACES=126, PETRI_TRANSITIONS=256} [2023-08-24 13:44:28,815 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2023-08-24 13:44:28,815 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 256 transitions, 2909 flow [2023-08-24 13:44:28,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 185.67924528301887) internal successors, (9841), 53 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:28,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:28,818 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:28,828 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 13:44:29,024 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,SelfDestructingSolverStorable13 [2023-08-24 13:44:29,024 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:29,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash 232692696, now seen corresponding path program 2 times [2023-08-24 13:44:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:29,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760412375] [2023-08-24 13:44:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:29,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:30,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:30,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760412375] [2023-08-24 13:44:30,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760412375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:30,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927644893] [2023-08-24 13:44:30,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:44:30,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:30,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:30,381 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 13:44:30,385 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 13:44:30,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:44:30,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:30,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:44:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:31,015 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:31,016 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 59 treesize of output 75 [2023-08-24 13:44:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:31,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:31,626 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:44:31,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:44:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:31,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927644893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:31,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 32 [2023-08-24 13:44:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346324880] [2023-08-24 13:44:31,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 13:44:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:31,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 13:44:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 13:44:31,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 672 [2023-08-24 13:44:31,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 256 transitions, 2909 flow. Second operand has 33 states, 33 states have (on average 227.24242424242425) internal successors, (7499), 33 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:31,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:31,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 672 [2023-08-24 13:44:31,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:35,154 INFO L124 PetriNetUnfolderBase]: 8819/12744 cut-off events. [2023-08-24 13:44:35,155 INFO L125 PetriNetUnfolderBase]: For 73970/73970 co-relation queries the response was YES. [2023-08-24 13:44:35,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63580 conditions, 12744 events. 8819/12744 cut-off events. For 73970/73970 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 72179 event pairs, 1271 based on Foata normal form. 1/12745 useless extension candidates. Maximal degree in co-relation 63374. Up to 4754 conditions per place. [2023-08-24 13:44:35,275 INFO L140 encePairwiseOnDemand]: 658/672 looper letters, 381 selfloop transitions, 200 changer transitions 11/592 dead transitions. [2023-08-24 13:44:35,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 592 transitions, 7207 flow [2023-08-24 13:44:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 13:44:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 13:44:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4726 transitions. [2023-08-24 13:44:35,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3516369047619048 [2023-08-24 13:44:35,283 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4726 transitions. [2023-08-24 13:44:35,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4726 transitions. [2023-08-24 13:44:35,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:35,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4726 transitions. [2023-08-24 13:44:35,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 236.3) internal successors, (4726), 20 states have internal predecessors, (4726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:35,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 672.0) internal successors, (14112), 21 states have internal predecessors, (14112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:35,477 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 672.0) internal successors, (14112), 21 states have internal predecessors, (14112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:35,477 INFO L175 Difference]: Start difference. First operand has 126 places, 256 transitions, 2909 flow. Second operand 20 states and 4726 transitions. [2023-08-24 13:44:35,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 592 transitions, 7207 flow [2023-08-24 13:44:35,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 592 transitions, 6868 flow, removed 121 selfloop flow, removed 13 redundant places. [2023-08-24 13:44:35,872 INFO L231 Difference]: Finished difference. Result has 138 places, 359 transitions, 4347 flow [2023-08-24 13:44:35,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4347, PETRI_PLACES=138, PETRI_TRANSITIONS=359} [2023-08-24 13:44:35,872 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 104 predicate places. [2023-08-24 13:44:35,873 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 359 transitions, 4347 flow [2023-08-24 13:44:35,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 227.24242424242425) internal successors, (7499), 33 states have internal predecessors, (7499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:35,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:35,875 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:35,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 13:44:36,081 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,SelfDestructingSolverStorable14 [2023-08-24 13:44:36,081 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:36,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash -680614814, now seen corresponding path program 3 times [2023-08-24 13:44:36,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:36,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621284570] [2023-08-24 13:44:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:36,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 13:44:39,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621284570] [2023-08-24 13:44:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621284570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798003478] [2023-08-24 13:44:39,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:44:39,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:39,745 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 13:44:39,769 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 13:44:40,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:44:40,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:40,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:44:40,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:40,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:40,572 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 40 treesize of output 40 [2023-08-24 13:44:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:40,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:41,210 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:44:41,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:44:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:41,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798003478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:41,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 15, 10] total 47 [2023-08-24 13:44:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628851771] [2023-08-24 13:44:41,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:41,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-24 13:44:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-24 13:44:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2014, Unknown=0, NotChecked=0, Total=2256 [2023-08-24 13:44:41,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 672 [2023-08-24 13:44:41,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 359 transitions, 4347 flow. Second operand has 48 states, 48 states have (on average 182.8125) internal successors, (8775), 48 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:41,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:41,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 672 [2023-08-24 13:44:41,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:51,781 INFO L124 PetriNetUnfolderBase]: 20641/29815 cut-off events. [2023-08-24 13:44:51,781 INFO L125 PetriNetUnfolderBase]: For 214261/214261 co-relation queries the response was YES. [2023-08-24 13:44:51,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159179 conditions, 29815 events. 20641/29815 cut-off events. For 214261/214261 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 189750 event pairs, 4263 based on Foata normal form. 6/29809 useless extension candidates. Maximal degree in co-relation 154994. Up to 9796 conditions per place. [2023-08-24 13:44:52,064 INFO L140 encePairwiseOnDemand]: 652/672 looper letters, 564 selfloop transitions, 662 changer transitions 265/1491 dead transitions. [2023-08-24 13:44:52,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1491 transitions, 20012 flow [2023-08-24 13:44:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-24 13:44:52,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-24 13:44:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 12044 transitions. [2023-08-24 13:44:52,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2800409226190476 [2023-08-24 13:44:52,081 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 12044 transitions. [2023-08-24 13:44:52,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 12044 transitions. [2023-08-24 13:44:52,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:52,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 12044 transitions. [2023-08-24 13:44:52,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 188.1875) internal successors, (12044), 64 states have internal predecessors, (12044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 672.0) internal successors, (43680), 65 states have internal predecessors, (43680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,144 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 672.0) internal successors, (43680), 65 states have internal predecessors, (43680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,145 INFO L175 Difference]: Start difference. First operand has 138 places, 359 transitions, 4347 flow. Second operand 64 states and 12044 transitions. [2023-08-24 13:44:52,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1491 transitions, 20012 flow [2023-08-24 13:44:54,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 1491 transitions, 19809 flow, removed 96 selfloop flow, removed 3 redundant places. [2023-08-24 13:44:54,054 INFO L231 Difference]: Finished difference. Result has 228 places, 833 transitions, 12940 flow [2023-08-24 13:44:54,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=12940, PETRI_PLACES=228, PETRI_TRANSITIONS=833} [2023-08-24 13:44:54,055 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 194 predicate places. [2023-08-24 13:44:54,055 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 833 transitions, 12940 flow [2023-08-24 13:44:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 182.8125) internal successors, (8775), 48 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:54,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:54,056 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:54,061 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 13:44:54,256 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,SelfDestructingSolverStorable15 [2023-08-24 13:44:54,257 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:44:54,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:54,257 INFO L85 PathProgramCache]: Analyzing trace with hash 265446204, now seen corresponding path program 4 times [2023-08-24 13:44:54,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:54,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966149836] [2023-08-24 13:44:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:44:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966149836] [2023-08-24 13:44:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966149836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44897310] [2023-08-24 13:44:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:44:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:57,022 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 13:44:57,023 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 13:44:57,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:44:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:57,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 13:44:57,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:57,714 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:57,714 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 40 treesize of output 48 [2023-08-24 13:44:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:44:57,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:00,352 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:45:00,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:45:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:45:00,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44897310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:00,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:00,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 10] total 49 [2023-08-24 13:45:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102355419] [2023-08-24 13:45:00,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-24 13:45:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-24 13:45:00,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2241, Unknown=1, NotChecked=0, Total=2450 [2023-08-24 13:45:00,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 672 [2023-08-24 13:45:00,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 833 transitions, 12940 flow. Second operand has 50 states, 50 states have (on average 185.84) internal successors, (9292), 50 states have internal predecessors, (9292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:00,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:00,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 672 [2023-08-24 13:45:00,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:12,263 WARN L234 SmtUtils]: Spent 11.68s on a formula simplification. DAG size of input: 93 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 13:45:14,405 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 13:45:31,330 INFO L124 PetriNetUnfolderBase]: 37335/54020 cut-off events. [2023-08-24 13:45:31,330 INFO L125 PetriNetUnfolderBase]: For 1277405/1277405 co-relation queries the response was YES. [2023-08-24 13:45:32,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434238 conditions, 54020 events. 37335/54020 cut-off events. For 1277405/1277405 co-relation queries the response was YES. Maximal size of possible extension queue 2403. Compared 372538 event pairs, 7216 based on Foata normal form. 8/54027 useless extension candidates. Maximal degree in co-relation 429767. Up to 11169 conditions per place. [2023-08-24 13:45:32,414 INFO L140 encePairwiseOnDemand]: 652/672 looper letters, 943 selfloop transitions, 1203 changer transitions 34/2180 dead transitions. [2023-08-24 13:45:32,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 2180 transitions, 37031 flow [2023-08-24 13:45:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 13:45:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 13:45:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 8358 transitions. [2023-08-24 13:45:32,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28924418604651164 [2023-08-24 13:45:32,429 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 8358 transitions. [2023-08-24 13:45:32,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 8358 transitions. [2023-08-24 13:45:32,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:32,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 8358 transitions. [2023-08-24 13:45:32,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 194.37209302325581) internal successors, (8358), 43 states have internal predecessors, (8358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:32,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 672.0) internal successors, (29568), 44 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:32,473 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 672.0) internal successors, (29568), 44 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:32,473 INFO L175 Difference]: Start difference. First operand has 228 places, 833 transitions, 12940 flow. Second operand 43 states and 8358 transitions. [2023-08-24 13:45:32,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 2180 transitions, 37031 flow [2023-08-24 13:46:04,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 2180 transitions, 35592 flow, removed 695 selfloop flow, removed 10 redundant places. [2023-08-24 13:46:04,849 INFO L231 Difference]: Finished difference. Result has 256 places, 1433 transitions, 24957 flow [2023-08-24 13:46:04,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=12369, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=24957, PETRI_PLACES=256, PETRI_TRANSITIONS=1433} [2023-08-24 13:46:04,850 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 222 predicate places. [2023-08-24 13:46:04,850 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 1433 transitions, 24957 flow [2023-08-24 13:46:04,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 185.84) internal successors, (9292), 50 states have internal predecessors, (9292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:04,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:04,851 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:04,858 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 13:46:05,058 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,SelfDestructingSolverStorable16 [2023-08-24 13:46:05,058 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:46:05,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1171327640, now seen corresponding path program 5 times [2023-08-24 13:46:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767097381] [2023-08-24 13:46:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:46:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767097381] [2023-08-24 13:46:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767097381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556311138] [2023-08-24 13:46:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:46:08,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:08,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:08,103 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 13:46:08,105 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 13:46:08,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:46:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:08,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:46:08,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:09,146 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:09,146 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 40 treesize of output 48 [2023-08-24 13:46:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:46:09,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:09,901 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:46:09,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:46:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:46:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556311138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:10,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:10,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 10] total 54 [2023-08-24 13:46:10,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084117951] [2023-08-24 13:46:10,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-08-24 13:46:10,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:10,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-08-24 13:46:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2709, Unknown=0, NotChecked=0, Total=2970 [2023-08-24 13:46:10,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 672 [2023-08-24 13:46:10,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 1433 transitions, 24957 flow. Second operand has 55 states, 55 states have (on average 182.70909090909092) internal successors, (10049), 55 states have internal predecessors, (10049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:10,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:10,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 672 [2023-08-24 13:46:10,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:33,659 INFO L124 PetriNetUnfolderBase]: 42991/62232 cut-off events. [2023-08-24 13:46:33,660 INFO L125 PetriNetUnfolderBase]: For 1725173/1725173 co-relation queries the response was YES. [2023-08-24 13:46:34,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527970 conditions, 62232 events. 42991/62232 cut-off events. For 1725173/1725173 co-relation queries the response was YES. Maximal size of possible extension queue 2980. Compared 440462 event pairs, 7793 based on Foata normal form. 4/62236 useless extension candidates. Maximal degree in co-relation 505617. Up to 13297 conditions per place. [2023-08-24 13:46:35,032 INFO L140 encePairwiseOnDemand]: 653/672 looper letters, 981 selfloop transitions, 1735 changer transitions 48/2764 dead transitions. [2023-08-24 13:46:35,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 2764 transitions, 49504 flow [2023-08-24 13:46:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 13:46:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 13:46:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 11018 transitions. [2023-08-24 13:46:35,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2826867816091954 [2023-08-24 13:46:35,047 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 11018 transitions. [2023-08-24 13:46:35,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 11018 transitions. [2023-08-24 13:46:35,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:35,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 11018 transitions. [2023-08-24 13:46:35,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 189.9655172413793) internal successors, (11018), 58 states have internal predecessors, (11018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:35,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 672.0) internal successors, (39648), 59 states have internal predecessors, (39648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:35,105 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 672.0) internal successors, (39648), 59 states have internal predecessors, (39648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:35,105 INFO L175 Difference]: Start difference. First operand has 256 places, 1433 transitions, 24957 flow. Second operand 58 states and 11018 transitions. [2023-08-24 13:46:35,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 2764 transitions, 49504 flow [2023-08-24 13:47:22,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 2764 transitions, 47999 flow, removed 46 selfloop flow, removed 17 redundant places. [2023-08-24 13:47:22,864 INFO L231 Difference]: Finished difference. Result has 316 places, 1967 transitions, 38126 flow [2023-08-24 13:47:22,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=23814, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=38126, PETRI_PLACES=316, PETRI_TRANSITIONS=1967} [2023-08-24 13:47:22,866 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 282 predicate places. [2023-08-24 13:47:22,866 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 1967 transitions, 38126 flow [2023-08-24 13:47:22,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 182.70909090909092) internal successors, (10049), 55 states have internal predecessors, (10049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:22,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:22,867 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:22,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 13:47:23,068 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:47:23,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -514013440, now seen corresponding path program 6 times [2023-08-24 13:47:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338031633] [2023-08-24 13:47:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:47:24,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338031633] [2023-08-24 13:47:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338031633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403846468] [2023-08-24 13:47:24,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:47:24,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:24,253 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 13:47:24,256 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 13:47:24,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:47:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:24,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:47:24,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:24,928 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:24,929 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 59 treesize of output 75 [2023-08-24 13:47:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:47:25,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:25,605 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:47:25,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:47:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:47:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403846468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:25,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:25,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 31 [2023-08-24 13:47:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714276813] [2023-08-24 13:47:25,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:25,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:47:25,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:25,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:47:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-08-24 13:47:25,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 672 [2023-08-24 13:47:25,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1967 transitions, 38126 flow. Second operand has 32 states, 32 states have (on average 227.28125) internal successors, (7273), 32 states have internal predecessors, (7273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:25,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:25,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 672 [2023-08-24 13:47:25,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:49,537 INFO L124 PetriNetUnfolderBase]: 44039/63788 cut-off events. [2023-08-24 13:47:49,538 INFO L125 PetriNetUnfolderBase]: For 2231016/2231016 co-relation queries the response was YES. [2023-08-24 13:47:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597713 conditions, 63788 events. 44039/63788 cut-off events. For 2231016/2231016 co-relation queries the response was YES. Maximal size of possible extension queue 2931. Compared 451933 event pairs, 9117 based on Foata normal form. 8/63796 useless extension candidates. Maximal degree in co-relation 580505. Up to 23598 conditions per place. [2023-08-24 13:47:51,146 INFO L140 encePairwiseOnDemand]: 657/672 looper letters, 608 selfloop transitions, 1601 changer transitions 15/2224 dead transitions. [2023-08-24 13:47:51,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 2224 transitions, 46075 flow [2023-08-24 13:47:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 13:47:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 13:47:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 4483 transitions. [2023-08-24 13:47:51,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511121553884712 [2023-08-24 13:47:51,153 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 4483 transitions. [2023-08-24 13:47:51,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 4483 transitions. [2023-08-24 13:47:51,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:51,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 4483 transitions. [2023-08-24 13:47:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 235.94736842105263) internal successors, (4483), 19 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:51,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 672.0) internal successors, (13440), 20 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:51,175 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 672.0) internal successors, (13440), 20 states have internal predecessors, (13440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:51,175 INFO L175 Difference]: Start difference. First operand has 316 places, 1967 transitions, 38126 flow. Second operand 19 states and 4483 transitions. [2023-08-24 13:47:51,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 2224 transitions, 46075 flow [2023-08-24 13:48:55,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 2224 transitions, 45522 flow, removed 153 selfloop flow, removed 19 redundant places. [2023-08-24 13:48:55,490 INFO L231 Difference]: Finished difference. Result has 318 places, 1980 transitions, 41103 flow [2023-08-24 13:48:55,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=37573, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=41103, PETRI_PLACES=318, PETRI_TRANSITIONS=1980} [2023-08-24 13:48:55,492 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 284 predicate places. [2023-08-24 13:48:55,493 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1980 transitions, 41103 flow [2023-08-24 13:48:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 227.28125) internal successors, (7273), 32 states have internal predecessors, (7273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:55,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:55,494 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:55,499 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 13:48:55,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:55,694 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:48:55,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1050841698, now seen corresponding path program 7 times [2023-08-24 13:48:55,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:55,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226039000] [2023-08-24 13:48:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:48:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226039000] [2023-08-24 13:48:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226039000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:56,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148784489] [2023-08-24 13:48:56,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:48:56,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:56,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:56,803 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 13:48:56,806 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 13:48:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:57,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:48:57,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:57,243 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:48:57,243 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 40 treesize of output 40 [2023-08-24 13:48:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:48:57,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:57,714 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:48:57,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:48:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:48:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148784489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:57,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 28 [2023-08-24 13:48:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49157421] [2023-08-24 13:48:57,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:57,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 13:48:57,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 13:48:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2023-08-24 13:48:57,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 672 [2023-08-24 13:48:57,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1980 transitions, 41103 flow. Second operand has 29 states, 29 states have (on average 227.24137931034483) internal successors, (6590), 29 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:57,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:57,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 672 [2023-08-24 13:48:57,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:24,307 INFO L124 PetriNetUnfolderBase]: 48423/70136 cut-off events. [2023-08-24 13:49:24,308 INFO L125 PetriNetUnfolderBase]: For 2807694/2807694 co-relation queries the response was YES. [2023-08-24 13:49:25,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690225 conditions, 70136 events. 48423/70136 cut-off events. For 2807694/2807694 co-relation queries the response was YES. Maximal size of possible extension queue 3302. Compared 503026 event pairs, 9102 based on Foata normal form. 4/70140 useless extension candidates. Maximal degree in co-relation 670526. Up to 22302 conditions per place. [2023-08-24 13:49:26,234 INFO L140 encePairwiseOnDemand]: 658/672 looper letters, 571 selfloop transitions, 1743 changer transitions 16/2330 dead transitions. [2023-08-24 13:49:26,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 2330 transitions, 51249 flow [2023-08-24 13:49:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 13:49:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 13:49:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5186 transitions. [2023-08-24 13:49:26,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35078463203463206 [2023-08-24 13:49:26,242 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5186 transitions. [2023-08-24 13:49:26,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5186 transitions. [2023-08-24 13:49:26,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:26,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5186 transitions. [2023-08-24 13:49:26,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 235.72727272727272) internal successors, (5186), 22 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:26,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 672.0) internal successors, (15456), 23 states have internal predecessors, (15456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:26,265 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 672.0) internal successors, (15456), 23 states have internal predecessors, (15456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:26,265 INFO L175 Difference]: Start difference. First operand has 318 places, 1980 transitions, 41103 flow. Second operand 22 states and 5186 transitions. [2023-08-24 13:49:26,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 2330 transitions, 51249 flow [2023-08-24 13:50:50,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 2330 transitions, 48317 flow, removed 64 selfloop flow, removed 14 redundant places. [2023-08-24 13:50:50,915 INFO L231 Difference]: Finished difference. Result has 332 places, 2068 transitions, 44210 flow [2023-08-24 13:50:50,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=38263, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1655, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=44210, PETRI_PLACES=332, PETRI_TRANSITIONS=2068} [2023-08-24 13:50:50,917 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 298 predicate places. [2023-08-24 13:50:50,917 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 2068 transitions, 44210 flow [2023-08-24 13:50:50,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 227.24137931034483) internal successors, (6590), 29 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:50,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:50,918 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:50,929 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 13:50:51,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:51,129 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:50:51,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash -477788436, now seen corresponding path program 8 times [2023-08-24 13:50:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:51,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988439485] [2023-08-24 13:50:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:50:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988439485] [2023-08-24 13:50:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988439485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:50:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346452501] [2023-08-24 13:50:52,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:50:52,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:52,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:52,142 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 13:50:52,144 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 13:50:52,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:50:52,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:50:52,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:50:52,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:50:52,618 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:50:52,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-08-24 13:50:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:50:52,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:50:53,137 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:50:53,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:50:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:50:53,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346452501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:50:53,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:50:53,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-24 13:50:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763340501] [2023-08-24 13:50:53,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:50:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 13:50:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 13:50:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2023-08-24 13:50:53,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 672 [2023-08-24 13:50:53,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 2068 transitions, 44210 flow. Second operand has 31 states, 31 states have (on average 227.3548387096774) internal successors, (7048), 31 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:53,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:53,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 672 [2023-08-24 13:50:53,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:51:20,897 INFO L124 PetriNetUnfolderBase]: 48895/70820 cut-off events. [2023-08-24 13:51:20,897 INFO L125 PetriNetUnfolderBase]: For 3129605/3129605 co-relation queries the response was YES. [2023-08-24 13:51:22,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718716 conditions, 70820 events. 48895/70820 cut-off events. For 3129605/3129605 co-relation queries the response was YES. Maximal size of possible extension queue 3328. Compared 508418 event pairs, 9874 based on Foata normal form. 4/70824 useless extension candidates. Maximal degree in co-relation 699205. Up to 23810 conditions per place. [2023-08-24 13:51:22,901 INFO L140 encePairwiseOnDemand]: 658/672 looper letters, 585 selfloop transitions, 1741 changer transitions 22/2348 dead transitions. [2023-08-24 13:51:22,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 2348 transitions, 52756 flow [2023-08-24 13:51:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 13:51:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 13:51:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 5185 transitions. [2023-08-24 13:51:22,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35071699134199136 [2023-08-24 13:51:22,905 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 5185 transitions. [2023-08-24 13:51:22,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 5185 transitions. [2023-08-24 13:51:22,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:51:22,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 5185 transitions. [2023-08-24 13:51:22,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 235.6818181818182) internal successors, (5185), 22 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:23,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 672.0) internal successors, (15456), 23 states have internal predecessors, (15456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:23,058 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 672.0) internal successors, (15456), 23 states have internal predecessors, (15456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:23,058 INFO L175 Difference]: Start difference. First operand has 332 places, 2068 transitions, 44210 flow. Second operand 22 states and 5185 transitions. [2023-08-24 13:51:23,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 2348 transitions, 52756 flow [2023-08-24 13:52:56,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 2348 transitions, 50864 flow, removed 250 selfloop flow, removed 9 redundant places. [2023-08-24 13:52:56,455 INFO L231 Difference]: Finished difference. Result has 346 places, 2073 transitions, 45977 flow [2023-08-24 13:52:56,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=42344, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1736, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=45977, PETRI_PLACES=346, PETRI_TRANSITIONS=2073} [2023-08-24 13:52:56,456 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 312 predicate places. [2023-08-24 13:52:56,456 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 2073 transitions, 45977 flow [2023-08-24 13:52:56,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 227.3548387096774) internal successors, (7048), 31 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:56,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:52:56,457 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:52:56,462 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 13:52:56,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:56,658 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:52:56,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:52:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash 833865068, now seen corresponding path program 9 times [2023-08-24 13:52:56,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:52:56,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673493642] [2023-08-24 13:52:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:52:56,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:52:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:52:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:52:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:52:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673493642] [2023-08-24 13:52:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673493642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:52:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526690277] [2023-08-24 13:52:57,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:52:57,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:57,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:52:57,649 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 13:52:57,653 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 13:52:57,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:52:57,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:52:57,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:52:57,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:52:58,178 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:52:58,179 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 40 treesize of output 40 [2023-08-24 13:52:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:52:58,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:52:58,662 INFO L322 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-08-24 13:52:58,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2023-08-24 13:53:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:53:07,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526690277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:53:07,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:53:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 10] total 30 [2023-08-24 13:53:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073912171] [2023-08-24 13:53:07,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:53:07,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 13:53:07,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:53:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 13:53:07,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2023-08-24 13:53:07,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 672 [2023-08-24 13:53:07,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 2073 transitions, 45977 flow. Second operand has 31 states, 31 states have (on average 227.16129032258064) internal successors, (7042), 31 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:07,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:53:07,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 672 [2023-08-24 13:53:07,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:53:44,574 INFO L124 PetriNetUnfolderBase]: 64411/92992 cut-off events. [2023-08-24 13:53:44,575 INFO L125 PetriNetUnfolderBase]: For 4537960/4537960 co-relation queries the response was YES. [2023-08-24 13:53:46,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980896 conditions, 92992 events. 64411/92992 cut-off events. For 4537960/4537960 co-relation queries the response was YES. Maximal size of possible extension queue 4481. Compared 685453 event pairs, 9856 based on Foata normal form. 4/92996 useless extension candidates. Maximal degree in co-relation 966815. Up to 46946 conditions per place. [2023-08-24 13:53:47,238 INFO L140 encePairwiseOnDemand]: 660/672 looper letters, 694 selfloop transitions, 1907 changer transitions 195/2796 dead transitions. [2023-08-24 13:53:47,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 2796 transitions, 64776 flow [2023-08-24 13:53:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 13:53:47,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 13:53:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 6583 transitions. [2023-08-24 13:53:47,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34986181972789115 [2023-08-24 13:53:47,243 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 6583 transitions. [2023-08-24 13:53:47,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 6583 transitions. [2023-08-24 13:53:47,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:53:47,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 6583 transitions. [2023-08-24 13:53:47,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 235.10714285714286) internal successors, (6583), 28 states have internal predecessors, (6583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:47,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 672.0) internal successors, (19488), 29 states have internal predecessors, (19488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:47,262 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 672.0) internal successors, (19488), 29 states have internal predecessors, (19488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:47,262 INFO L175 Difference]: Start difference. First operand has 346 places, 2073 transitions, 45977 flow. Second operand 28 states and 6583 transitions. [2023-08-24 13:53:47,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 2796 transitions, 64776 flow [2023-08-24 13:56:31,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 2796 transitions, 61131 flow, removed 36 selfloop flow, removed 18 redundant places. [2023-08-24 13:56:31,133 INFO L231 Difference]: Finished difference. Result has 373 places, 2370 transitions, 55708 flow [2023-08-24 13:56:31,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=672, PETRI_DIFFERENCE_MINUEND_FLOW=42918, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=55708, PETRI_PLACES=373, PETRI_TRANSITIONS=2370} [2023-08-24 13:56:31,135 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 339 predicate places. [2023-08-24 13:56:31,135 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 2370 transitions, 55708 flow [2023-08-24 13:56:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 227.16129032258064) internal successors, (7042), 31 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:31,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:56:31,136 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:56:31,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 13:56:31,336 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,SelfDestructingSolverStorable21 [2023-08-24 13:56:31,337 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:56:31,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:56:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1653402880, now seen corresponding path program 10 times [2023-08-24 13:56:31,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:56:31,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22811346] [2023-08-24 13:56:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:56:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:56:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:56:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:56:33,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:56:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22811346] [2023-08-24 13:56:33,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22811346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:56:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739365456] [2023-08-24 13:56:33,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:56:33,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:56:33,490 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 13:56:33,491 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 13:56:33,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:56:33,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:56:33,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-24 13:56:33,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:56:34,167 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:56:34,168 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 40 treesize of output 48 [2023-08-24 13:56:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:34,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:56:36,806 INFO L322 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-08-24 13:56:36,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-08-24 13:56:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-24 13:56:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739365456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:56:36,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:56:36,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 10] total 49 [2023-08-24 13:56:36,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811471670] [2023-08-24 13:56:36,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:56:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-24 13:56:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:56:36,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-24 13:56:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2226, Unknown=1, NotChecked=0, Total=2450 [2023-08-24 13:56:36,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 672 [2023-08-24 13:56:36,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 2370 transitions, 55708 flow. Second operand has 50 states, 50 states have (on average 185.86) internal successors, (9293), 50 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:56:36,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:56:36,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 672 [2023-08-24 13:56:36,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:56:45,529 WARN L234 SmtUtils]: Spent 8.45s on a formula simplification. DAG size of input: 92 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 13:56:47,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-08-24 13:56:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 13:56:49,779 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 13:56:49,785 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 13:56:49,818 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 13:56:49,818 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 13:56:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:56:49,980 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (50states, 184/672 universal loopers) in iteration 23,while PetriNetUnfolder was constructing finite prefix that currently has 9609 conditions, 1121 events (605/1120 cut-off events. For 41627/41627 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 7565 event pairs, 78 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 9486. Up to 353 conditions per place.). [2023-08-24 13:56:49,981 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 13:56:49,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 13:56:49,982 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 13:56:49,982 INFO L445 BasicCegarLoop]: Path program histogram: [10, 5, 5, 2, 1] [2023-08-24 13:56:49,985 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 13:56:49,985 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 13:56:49,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 01:56:49 BasicIcfg [2023-08-24 13:56:49,987 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 13:56:49,987 INFO L158 Benchmark]: Toolchain (without parser) took 788796.70ms. Allocated memory was 373.3MB in the beginning and 15.1GB in the end (delta: 14.7GB). Free memory was 349.3MB in the beginning and 10.9GB in the end (delta: -10.6GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-24 13:56:49,987 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 373.3MB. Free memory is still 349.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 13:56:49,988 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.96ms. Allocated memory is still 373.3MB. Free memory was 349.3MB in the beginning and 337.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 13:56:49,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.49ms. Allocated memory is still 373.3MB. Free memory was 337.2MB in the beginning and 334.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 13:56:49,988 INFO L158 Benchmark]: Boogie Preprocessor took 48.02ms. Allocated memory is still 373.3MB. Free memory was 334.8MB in the beginning and 332.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 13:56:49,988 INFO L158 Benchmark]: RCFGBuilder took 738.91ms. Allocated memory is still 373.3MB. Free memory was 332.3MB in the beginning and 307.5MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-24 13:56:49,989 INFO L158 Benchmark]: TraceAbstraction took 787663.18ms. Allocated memory was 373.3MB in the beginning and 15.1GB in the end (delta: 14.7GB). Free memory was 306.8MB in the beginning and 10.9GB in the end (delta: -10.6GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-08-24 13:56:49,990 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 373.3MB. Free memory is still 349.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 274.96ms. Allocated memory is still 373.3MB. Free memory was 349.3MB in the beginning and 337.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 66.49ms. Allocated memory is still 373.3MB. Free memory was 337.2MB in the beginning and 334.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.02ms. Allocated memory is still 373.3MB. Free memory was 334.8MB in the beginning and 332.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 738.91ms. Allocated memory is still 373.3MB. Free memory was 332.3MB in the beginning and 307.5MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 787663.18ms. Allocated memory was 373.3MB in the beginning and 15.1GB in the end (delta: 14.7GB). Free memory was 306.8MB in the beginning and 10.9GB in the end (delta: -10.6GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.7s, 290 PlacesBefore, 34 PlacesAfterwards, 308 TransitionsBefore, 31 TransitionsAfterwards, 15390 CoEnabledTransitionPairs, 7 FixpointIterations, 135 TrivialSequentialCompositions, 124 ConcurrentSequentialCompositions, 31 TrivialYvCompositions, 40 ConcurrentYvCompositions, 21 ChoiceCompositions, 351 TotalNumberOfCompositions, 14265 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13677, independent: 13630, independent conditional: 0, independent unconditional: 13630, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 8854, independent: 8836, independent conditional: 0, independent unconditional: 8836, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13677, independent: 4794, independent conditional: 0, independent unconditional: 4794, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 8854, unknown conditional: 0, unknown unconditional: 8854] , Statistics on independence cache: Total cache size (in pairs): 79, Positive cache size: 75, Positive conditional cache size: 0, Positive unconditional cache size: 75, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (50states, 184/672 universal loopers) in iteration 23,while PetriNetUnfolder was constructing finite prefix that currently has 9609 conditions, 1121 events (605/1120 cut-off events. For 41627/41627 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 7565 event pairs, 78 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 9486. Up to 353 conditions per place.). - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (50states, 184/672 universal loopers) in iteration 23,while PetriNetUnfolder was constructing finite prefix that currently has 9609 conditions, 1121 events (605/1120 cut-off events. For 41627/41627 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 7565 event pairs, 78 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 9486. Up to 353 conditions per place.). - 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 enhancing Floyd-Hoare automaton (50states, 184/672 universal loopers) in iteration 23,while PetriNetUnfolder was constructing finite prefix that currently has 9609 conditions, 1121 events (605/1120 cut-off events. For 41627/41627 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 7565 event pairs, 78 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 9486. Up to 353 conditions per place.). - 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 enhancing Floyd-Hoare automaton (50states, 184/672 universal loopers) in iteration 23,while PetriNetUnfolder was constructing finite prefix that currently has 9609 conditions, 1121 events (605/1120 cut-off events. For 41627/41627 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 7565 event pairs, 78 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 9486. Up to 353 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 420 locations, 4 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: 787.5s, OverallIterations: 23, TraceHistogramMax: 5, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 707.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.9s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 6431 SdHoareTripleChecker+Valid, 21.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6431 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 19.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 338 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 989 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28472 IncrementalHoareTripleChecker+Invalid, 29800 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 989 mSolverCounterUnsat, 0 mSDtfsCounter, 28472 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1872 GetRequests, 1057 SyntacticMatches, 24 SemanticMatches, 791 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14229 ImplicationChecksByTransitivity, 55.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55708occurred in iteration=22, InterpolantAutomatonStates: 377, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 61.3s InterpolantComputationTime, 1547 NumberOfCodeBlocks, 1480 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 2052 ConstructedInterpolants, 94 QuantifiedInterpolants, 17793 SizeOfPredicates, 385 NumberOfNonLiveVariables, 7404 ConjunctsInSsa, 579 ConjunctsInUnsatCore, 54 InterpolantComputations, 11 PerfectInterpolantSequences, 1950/2265 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