/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 04:12:07,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 04:12:07,560 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 04:12:07,566 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 04:12:07,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 04:12:07,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 04:12:07,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 04:12:07,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 04:12:07,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 04:12:07,606 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 04:12:07,606 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 04:12:07,606 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 04:12:07,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 04:12:07,607 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 04:12:07,608 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 04:12:07,608 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 04:12:07,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 04:12:07,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 04:12:07,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 04:12:07,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 04:12:07,609 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 04:12:07,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 04:12:07,610 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 04:12:07,610 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 04:12:07,611 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 04:12:07,611 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 04:12:07,611 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 04:12:07,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 04:12:07,611 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 04:12:07,612 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 04:12:07,612 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 04:12:07,613 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 04:12:07,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 04:12:07,613 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 04:12:07,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 04:12:07,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 04:12:07,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 04:12:07,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 04:12:07,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 04:12:07,940 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 04:12:07,940 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 04:12:07,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-24 04:12:09,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 04:12:09,407 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 04:12:09,408 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-24 04:12:09,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5a481f6/6a2f1cb53c654b7a9b653d36f914fb34/FLAGc268a8690 [2023-08-24 04:12:09,429 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd5a481f6/6a2f1cb53c654b7a9b653d36f914fb34 [2023-08-24 04:12:09,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 04:12:09,435 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 04:12:09,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 04:12:09,436 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 04:12:09,439 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 04:12:09,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e6dad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09, skipping insertion in model container [2023-08-24 04:12:09,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,470 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 04:12:09,612 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c[2975,2988] [2023-08-24 04:12:09,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 04:12:09,623 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 04:12:09,644 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c[2975,2988] [2023-08-24 04:12:09,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 04:12:09,659 INFO L206 MainTranslator]: Completed translation [2023-08-24 04:12:09,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09 WrapperNode [2023-08-24 04:12:09,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 04:12:09,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 04:12:09,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 04:12:09,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 04:12:09,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,682 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,716 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 208 [2023-08-24 04:12:09,717 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 04:12:09,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 04:12:09,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 04:12:09,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 04:12:09,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,734 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,741 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 04:12:09,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 04:12:09,742 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 04:12:09,742 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 04:12:09,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (1/1) ... [2023-08-24 04:12:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 04:12:09,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:12:09,774 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 04:12:09,794 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 04:12:09,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 04:12:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 04:12:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 04:12:09,812 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 04:12:09,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 04:12:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 04:12:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 04:12:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 04:12:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 04:12:09,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 04:12:09,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 04:12:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 04:12:09,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 04:12:09,815 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 04:12:09,932 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 04:12:09,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 04:12:10,278 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 04:12:10,287 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 04:12:10,287 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 04:12:10,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:12:10 BoogieIcfgContainer [2023-08-24 04:12:10,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 04:12:10,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 04:12:10,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 04:12:10,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 04:12:10,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:12:09" (1/3) ... [2023-08-24 04:12:10,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180f3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:12:10, skipping insertion in model container [2023-08-24 04:12:10,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:12:09" (2/3) ... [2023-08-24 04:12:10,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180f3d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:12:10, skipping insertion in model container [2023-08-24 04:12:10,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:12:10" (3/3) ... [2023-08-24 04:12:10,298 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-08-24 04:12:10,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 04:12:10,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 04:12:10,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 04:12:10,436 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 04:12:10,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 251 transitions, 518 flow [2023-08-24 04:12:10,604 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-24 04:12:10,608 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 04:12:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 24/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 480 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2023-08-24 04:12:10,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 251 transitions, 518 flow [2023-08-24 04:12:10,622 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 241 transitions, 494 flow [2023-08-24 04:12:10,625 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 04:12:10,632 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 241 transitions, 494 flow [2023-08-24 04:12:10,634 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 241 transitions, 494 flow [2023-08-24 04:12:10,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 241 transitions, 494 flow [2023-08-24 04:12:10,672 INFO L124 PetriNetUnfolderBase]: 24/241 cut-off events. [2023-08-24 04:12:10,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 04:12:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 241 events. 24/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 460 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2023-08-24 04:12:10,678 INFO L119 LiptonReduction]: Number of co-enabled transitions 6892 [2023-08-24 04:12:30,697 WARN L234 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 203 DAG size of output: 201 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 04:12:34,724 INFO L134 LiptonReduction]: Checked pairs total: 6480 [2023-08-24 04:12:34,724 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-24 04:12:34,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 04:12:34,740 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;@3e228754, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 04:12:34,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 04:12:34,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 04:12:34,766 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 04:12:34,766 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 04:12:34,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:34,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:34,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:34,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash 437361815, now seen corresponding path program 1 times [2023-08-24 04:12:34,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:34,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445930578] [2023-08-24 04:12:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:34,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:35,264 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 04:12:35,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445930578] [2023-08-24 04:12:35,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445930578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:35,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:35,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 04:12:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949307769] [2023-08-24 04:12:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:35,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 04:12:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 04:12:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 04:12:35,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 544 [2023-08-24 04:12:35,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:35,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:35,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 544 [2023-08-24 04:12:35,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:35,425 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-24 04:12:35,425 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 04:12:35,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-24 04:12:35,427 INFO L140 encePairwiseOnDemand]: 541/544 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-24 04:12:35,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-24 04:12:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 04:12:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 04:12:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-24 04:12:35,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38357843137254904 [2023-08-24 04:12:35,442 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-24 04:12:35,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-24 04:12:35,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:35,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-24 04:12:35,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:35,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:35,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:35,459 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 626 transitions. [2023-08-24 04:12:35,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-24 04:12:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 04:12:35,463 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-24 04:12:35,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-24 04:12:35,467 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 04:12:35,467 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-24 04:12:35,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:35,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:35,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:35,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 04:12:35,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:35,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:35,470 INFO L85 PathProgramCache]: Analyzing trace with hash 140349569, now seen corresponding path program 1 times [2023-08-24 04:12:35,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:35,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415217009] [2023-08-24 04:12:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:35,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415217009] [2023-08-24 04:12:35,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415217009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:35,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:35,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:12:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689544915] [2023-08-24 04:12:35,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:35,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:12:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:12:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:12:35,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:12:35,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:35,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:35,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:12:35,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:36,337 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-08-24 04:12:36,338 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 04:12:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-24 04:12:36,339 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 04:12:36,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-24 04:12:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 04:12:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 04:12:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1005 transitions. [2023-08-24 04:12:36,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694852941176471 [2023-08-24 04:12:36,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1005 transitions. [2023-08-24 04:12:36,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1005 transitions. [2023-08-24 04:12:36,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:36,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1005 transitions. [2023-08-24 04:12:36,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,353 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,353 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1005 transitions. [2023-08-24 04:12:36,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-24 04:12:36,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 04:12:36,355 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-24 04:12:36,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-24 04:12:36,356 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 04:12:36,356 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-24 04:12:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:36,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:36,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 04:12:36,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:36,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1260427053, now seen corresponding path program 2 times [2023-08-24 04:12:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551520824] [2023-08-24 04:12:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:36,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551520824] [2023-08-24 04:12:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551520824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:36,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:36,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:12:36,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808364837] [2023-08-24 04:12:36,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:36,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:12:36,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:12:36,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:12:36,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:12:36,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:36,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:12:36,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:36,747 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2023-08-24 04:12:36,747 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-08-24 04:12:36,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 648 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-08-24 04:12:36,750 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-08-24 04:12:36,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-08-24 04:12:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 04:12:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 04:12:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2023-08-24 04:12:36,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36801470588235297 [2023-08-24 04:12:36,754 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2023-08-24 04:12:36,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2023-08-24 04:12:36,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:36,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2023-08-24 04:12:36,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,763 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,763 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 1001 transitions. [2023-08-24 04:12:36,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-08-24 04:12:36,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 04:12:36,767 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-08-24 04:12:36,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-24 04:12:36,769 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-08-24 04:12:36,769 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-08-24 04:12:36,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:36,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:36,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:36,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 04:12:36,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:36,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash -705386557, now seen corresponding path program 3 times [2023-08-24 04:12:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:36,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017808414] [2023-08-24 04:12:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:37,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:37,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017808414] [2023-08-24 04:12:37,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017808414] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:37,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:37,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:12:37,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250562085] [2023-08-24 04:12:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:12:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:12:37,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:12:37,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:12:37,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:37,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:12:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:37,446 INFO L124 PetriNetUnfolderBase]: 121/224 cut-off events. [2023-08-24 04:12:37,446 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-08-24 04:12:37,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 734 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-08-24 04:12:37,449 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-08-24 04:12:37,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-08-24 04:12:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 04:12:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 04:12:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1006 transitions. [2023-08-24 04:12:37,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698529411764706 [2023-08-24 04:12:37,454 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1006 transitions. [2023-08-24 04:12:37,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1006 transitions. [2023-08-24 04:12:37,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:37,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1006 transitions. [2023-08-24 04:12:37,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,463 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 1006 transitions. [2023-08-24 04:12:37,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-08-24 04:12:37,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-24 04:12:37,468 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-08-24 04:12:37,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-24 04:12:37,470 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-08-24 04:12:37,470 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-08-24 04:12:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:37,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 04:12:37,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:37,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -265275717, now seen corresponding path program 4 times [2023-08-24 04:12:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:37,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129061907] [2023-08-24 04:12:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:37,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:37,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:37,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129061907] [2023-08-24 04:12:37,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129061907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:37,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:37,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:12:37,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980914989] [2023-08-24 04:12:37,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:37,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:12:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:12:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:12:37,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:12:37,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:37,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:12:37,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:37,893 INFO L124 PetriNetUnfolderBase]: 117/220 cut-off events. [2023-08-24 04:12:37,895 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2023-08-24 04:12:37,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-08-24 04:12:37,901 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-08-24 04:12:37,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-08-24 04:12:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 04:12:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 04:12:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2023-08-24 04:12:37,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-24 04:12:37,905 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2023-08-24 04:12:37,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2023-08-24 04:12:37,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:37,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2023-08-24 04:12:37,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,916 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,916 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 1000 transitions. [2023-08-24 04:12:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-08-24 04:12:37,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 04:12:37,921 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-08-24 04:12:37,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 04:12:37,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-24 04:12:37,923 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-08-24 04:12:37,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:37,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:37,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:37,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 04:12:37,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:37,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:37,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1433679233, now seen corresponding path program 5 times [2023-08-24 04:12:37,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:37,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078445529] [2023-08-24 04:12:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:37,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:38,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078445529] [2023-08-24 04:12:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078445529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:38,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:38,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:12:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899106589] [2023-08-24 04:12:38,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:38,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:12:38,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:12:38,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:12:38,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:12:38,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:38,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:12:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:38,380 INFO L124 PetriNetUnfolderBase]: 118/223 cut-off events. [2023-08-24 04:12:38,380 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-08-24 04:12:38,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-08-24 04:12:38,382 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-08-24 04:12:38,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-08-24 04:12:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 04:12:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 04:12:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1004 transitions. [2023-08-24 04:12:38,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36911764705882355 [2023-08-24 04:12:38,386 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1004 transitions. [2023-08-24 04:12:38,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1004 transitions. [2023-08-24 04:12:38,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:38,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1004 transitions. [2023-08-24 04:12:38,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,396 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,396 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 1004 transitions. [2023-08-24 04:12:38,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-08-24 04:12:38,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-24 04:12:38,401 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-08-24 04:12:38,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-08-24 04:12:38,403 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 04:12:38,403 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-08-24 04:12:38,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:38,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:38,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 04:12:38,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:38,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1263273043, now seen corresponding path program 6 times [2023-08-24 04:12:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:38,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745927897] [2023-08-24 04:12:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:38,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745927897] [2023-08-24 04:12:38,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745927897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:12:38,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:12:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 04:12:38,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346260234] [2023-08-24 04:12:38,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:12:38,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:12:38,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:12:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:12:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:12:38,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:12:38,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:12:38,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:12:38,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:12:38,803 INFO L124 PetriNetUnfolderBase]: 117/216 cut-off events. [2023-08-24 04:12:38,803 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2023-08-24 04:12:38,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 675 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-08-24 04:12:38,805 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-08-24 04:12:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-08-24 04:12:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 04:12:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 04:12:38,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2023-08-24 04:12:38,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-24 04:12:38,809 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2023-08-24 04:12:38,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2023-08-24 04:12:38,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:12:38,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2023-08-24 04:12:38,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,816 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 1000 transitions. [2023-08-24 04:12:38,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-08-24 04:12:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 04:12:38,820 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-08-24 04:12:38,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-24 04:12:38,821 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-08-24 04:12:38,821 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-08-24 04:12:38,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:12:38,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:12:38,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:12:38,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 04:12:38,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:12:38,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:12:38,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1054297638, now seen corresponding path program 1 times [2023-08-24 04:12:38,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:12:38,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144530868] [2023-08-24 04:12:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:38,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:12:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:12:39,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:12:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144530868] [2023-08-24 04:12:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144530868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:12:39,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849794795] [2023-08-24 04:12:39,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:12:39,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:12:39,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:12:39,181 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 04:12:39,204 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 04:12:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:12:39,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 04:12:39,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:12:39,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 04:12:39,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:12:39,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:12:40,552 INFO L322 Elim1Store]: treesize reduction 294, result has 7.8 percent of original size [2023-08-24 04:12:40,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 537 treesize of output 386 [2023-08-24 04:12:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:12:44,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:13:06,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:06,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 406 treesize of output 238 [2023-08-24 04:13:06,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:06,457 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 9 new quantified variables, introduced 10 case distinctions, treesize of input 1246 treesize of output 1134 [2023-08-24 04:13:06,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:06,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 234 [2023-08-24 04:13:10,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:10,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 229 [2023-08-24 04:13:10,873 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 04:13:10,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 698 treesize of output 1 [2023-08-24 04:13:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:13:10,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849794795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:13:10,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:13:10,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 04:13:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111829206] [2023-08-24 04:13:10,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:13:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 04:13:10,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:13:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 04:13:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2023-08-24 04:13:10,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 544 [2023-08-24 04:13:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 93.66666666666667) internal successors, (1686), 18 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:13:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:13:10,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 544 [2023-08-24 04:13:10,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:13:19,321 WARN L234 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:13:19,843 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (let ((.cse3 (select |c_#memory_int| c_~f~0.base))) (let ((.cse0 (select .cse3 .cse4))) (let ((.cse1 (select .cse3 (+ c_~f~0.offset (* (select .cse3 (+ c_~f~0.offset (* 4 (select .cse3 (+ (* .cse0 4) c_~f~0.offset))))) 4))))) (or (< .cse0 0) (< .cse1 0) (let ((.cse2 (select .cse3 (+ c_~f~0.offset (* 4 .cse1))))) (and (= c_~x1~0 .cse2) (or (= c_~x1~0 (select .cse3 (+ (* 4 .cse2) c_~f~0.offset))) (<= c_~size~0 .cse2) (< .cse2 0)))) (<= c_~size~0 .cse0) (<= c_~size~0 .cse1))))) (forall ((v_ArrVal_137 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~f~0.base))) (let ((.cse5 (select .cse7 .cse4))) (let ((.cse6 (select .cse7 (+ c_~f~0.offset (* 4 (select .cse7 (+ c_~f~0.offset (* (select .cse7 (+ (* .cse5 4) c_~f~0.offset)) 4)))))))) (or (< .cse5 0) (<= c_~size~0 .cse5) (< .cse6 0) (= (select .cse7 (+ (* 4 .cse6) c_~f~0.offset)) c_~x1~0) (<= c_~size~0 .cse6)))))) (= |c_thread2Thread1of1ForFork0_~i~1#1| 0) (forall ((v_ArrVal_137 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~f~0.base))) (let ((.cse8 (select .cse9 .cse4))) (let ((.cse11 (select .cse9 (+ c_~f~0.offset (* 4 (select .cse9 (+ c_~f~0.offset (* (select .cse9 (+ (* .cse8 4) c_~f~0.offset)) 4)))))))) (let ((.cse10 (select .cse9 (+ (* 4 .cse11) c_~f~0.offset)))) (or (< .cse8 0) (<= c_~size~0 .cse8) (= (select .cse9 (+ c_~f~0.offset (* .cse10 4))) c_~x1~0) (< .cse10 0) (< .cse11 0) (<= c_~size~0 .cse10) (<= c_~size~0 .cse11))))))))) is different from false [2023-08-24 04:13:24,403 INFO L124 PetriNetUnfolderBase]: 437/794 cut-off events. [2023-08-24 04:13:24,404 INFO L125 PetriNetUnfolderBase]: For 2266/2266 co-relation queries the response was YES. [2023-08-24 04:13:24,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3118 conditions, 794 events. 437/794 cut-off events. For 2266/2266 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3795 event pairs, 18 based on Foata normal form. 10/665 useless extension candidates. Maximal degree in co-relation 2363. Up to 277 conditions per place. [2023-08-24 04:13:24,408 INFO L140 encePairwiseOnDemand]: 530/544 looper letters, 81 selfloop transitions, 46 changer transitions 87/214 dead transitions. [2023-08-24 04:13:24,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 214 transitions, 1671 flow [2023-08-24 04:13:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 04:13:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 04:13:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2367 transitions. [2023-08-24 04:13:24,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18129595588235295 [2023-08-24 04:13:24,419 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2367 transitions. [2023-08-24 04:13:24,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2367 transitions. [2023-08-24 04:13:24,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:13:24,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2367 transitions. [2023-08-24 04:13:24,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.625) internal successors, (2367), 24 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:13:24,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 544.0) internal successors, (13600), 25 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:13:24,442 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 544.0) internal successors, (13600), 25 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:13:24,442 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 24 states and 2367 transitions. [2023-08-24 04:13:24,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 214 transitions, 1671 flow [2023-08-24 04:13:24,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 214 transitions, 1581 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 04:13:24,453 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 689 flow [2023-08-24 04:13:24,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=689, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2023-08-24 04:13:24,454 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 62 predicate places. [2023-08-24 04:13:24,455 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 689 flow [2023-08-24 04:13:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.66666666666667) internal successors, (1686), 18 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:13:24,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:13:24,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:13:24,467 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 04:13:24,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:13:24,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:13:24,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:13:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash 373667530, now seen corresponding path program 1 times [2023-08-24 04:13:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:13:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739559964] [2023-08-24 04:13:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:13:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:13:24,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:13:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:13:24,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:13:24,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739559964] [2023-08-24 04:13:24,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739559964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:13:24,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72278726] [2023-08-24 04:13:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:13:24,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:13:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:13:24,908 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 04:13:24,911 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 04:13:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:13:25,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 04:13:25,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:13:25,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 04:13:25,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:13:25,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:13:25,560 INFO L322 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-08-24 04:13:25,560 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 343 treesize of output 320 [2023-08-24 04:13:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:13:25,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:13:42,195 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:42,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 272 [2023-08-24 04:13:42,257 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:42,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 1536 treesize of output 1392 [2023-08-24 04:13:42,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:42,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 276 [2023-08-24 04:13:46,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:13:46,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 345 treesize of output 269 [2023-08-24 04:13:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:13:47,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72278726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:13:47,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:13:47,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 04:13:47,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921488898] [2023-08-24 04:13:47,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:13:47,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 04:13:47,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:13:47,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 04:13:47,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=367, Unknown=3, NotChecked=0, Total=462 [2023-08-24 04:13:47,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 04:13:47,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 689 flow. Second operand has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:13:47,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:13:47,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 04:13:47,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:13:51,485 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 04:13:59,426 WARN L234 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 86 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:14:01,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 04:14:03,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 04:14:12,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 04:14:24,394 WARN L234 SmtUtils]: Spent 12.28s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:14:37,349 WARN L234 SmtUtils]: Spent 10.59s on a formula simplification. DAG size of input: 157 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:14:46,419 WARN L234 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:14:49,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:14:53,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 04:14:56,165 WARN L539 Checker$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 04:15:00,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:15:02,746 INFO L124 PetriNetUnfolderBase]: 582/1109 cut-off events. [2023-08-24 04:15:02,747 INFO L125 PetriNetUnfolderBase]: For 6027/6027 co-relation queries the response was YES. [2023-08-24 04:15:02,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 1109 events. 582/1109 cut-off events. For 6027/6027 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6075 event pairs, 26 based on Foata normal form. 26/1129 useless extension candidates. Maximal degree in co-relation 5541. Up to 525 conditions per place. [2023-08-24 04:15:02,768 INFO L140 encePairwiseOnDemand]: 533/544 looper letters, 142 selfloop transitions, 97 changer transitions 77/316 dead transitions. [2023-08-24 04:15:02,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 316 transitions, 3081 flow [2023-08-24 04:15:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 04:15:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 04:15:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 5468 transitions. [2023-08-24 04:15:02,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24515781922525107 [2023-08-24 04:15:02,783 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 5468 transitions. [2023-08-24 04:15:02,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 5468 transitions. [2023-08-24 04:15:02,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:15:02,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 5468 transitions. [2023-08-24 04:15:02,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 133.3658536585366) internal successors, (5468), 41 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:02,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 544.0) internal successors, (22848), 42 states have internal predecessors, (22848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:02,822 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 544.0) internal successors, (22848), 42 states have internal predecessors, (22848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:02,822 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 689 flow. Second operand 41 states and 5468 transitions. [2023-08-24 04:15:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 316 transitions, 3081 flow [2023-08-24 04:15:02,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 316 transitions, 2671 flow, removed 204 selfloop flow, removed 9 redundant places. [2023-08-24 04:15:02,848 INFO L231 Difference]: Finished difference. Result has 127 places, 130 transitions, 1492 flow [2023-08-24 04:15:02,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1492, PETRI_PLACES=127, PETRI_TRANSITIONS=130} [2023-08-24 04:15:02,849 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2023-08-24 04:15:02,849 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 130 transitions, 1492 flow [2023-08-24 04:15:02,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:02,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:15:02,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:15:02,860 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 04:15:03,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 04:15:03,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:15:03,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:15:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 321377432, now seen corresponding path program 2 times [2023-08-24 04:15:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:15:03,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290191218] [2023-08-24 04:15:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:15:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:15:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:15:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:15:03,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:15:03,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290191218] [2023-08-24 04:15:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290191218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:15:03,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345199946] [2023-08-24 04:15:03,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 04:15:03,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:15:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:15:03,287 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 04:15:03,293 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 04:15:03,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 04:15:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:15:03,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 04:15:03,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:15:03,813 INFO L322 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-08-24 04:15:03,813 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 343 treesize of output 320 [2023-08-24 04:15:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:15:04,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:15:48,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-24 04:15:48,622 INFO L322 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-08-24 04:15:48,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 145 [2023-08-24 04:15:48,931 INFO L322 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-24 04:15:48,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 1 [2023-08-24 04:15:48,945 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 04:15:48,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-08-24 04:15:49,134 INFO L322 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-08-24 04:15:49,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 1 [2023-08-24 04:15:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:15:49,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345199946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:15:49,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:15:49,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 04:15:49,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805635664] [2023-08-24 04:15:49,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:15:49,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 04:15:49,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:15:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 04:15:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-24 04:15:49,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 544 [2023-08-24 04:15:49,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 130 transitions, 1492 flow. Second operand has 18 states, 18 states have (on average 136.66666666666666) internal successors, (2460), 18 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:15:49,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 544 [2023-08-24 04:15:49,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:15:50,303 INFO L124 PetriNetUnfolderBase]: 476/909 cut-off events. [2023-08-24 04:15:50,303 INFO L125 PetriNetUnfolderBase]: For 6768/6768 co-relation queries the response was YES. [2023-08-24 04:15:50,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5440 conditions, 909 events. 476/909 cut-off events. For 6768/6768 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4674 event pairs, 114 based on Foata normal form. 12/920 useless extension candidates. Maximal degree in co-relation 5297. Up to 675 conditions per place. [2023-08-24 04:15:50,311 INFO L140 encePairwiseOnDemand]: 534/544 looper letters, 111 selfloop transitions, 51 changer transitions 10/172 dead transitions. [2023-08-24 04:15:50,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 172 transitions, 2066 flow [2023-08-24 04:15:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 04:15:50,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 04:15:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2370 transitions. [2023-08-24 04:15:50,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2562716262975779 [2023-08-24 04:15:50,316 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2370 transitions. [2023-08-24 04:15:50,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2370 transitions. [2023-08-24 04:15:50,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:15:50,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2370 transitions. [2023-08-24 04:15:50,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.41176470588235) internal successors, (2370), 17 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:50,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:50,329 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:50,329 INFO L175 Difference]: Start difference. First operand has 127 places, 130 transitions, 1492 flow. Second operand 17 states and 2370 transitions. [2023-08-24 04:15:50,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 172 transitions, 2066 flow [2023-08-24 04:15:50,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1847 flow, removed 102 selfloop flow, removed 9 redundant places. [2023-08-24 04:15:50,360 INFO L231 Difference]: Finished difference. Result has 130 places, 130 transitions, 1428 flow [2023-08-24 04:15:50,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1428, PETRI_PLACES=130, PETRI_TRANSITIONS=130} [2023-08-24 04:15:50,360 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2023-08-24 04:15:50,360 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 130 transitions, 1428 flow [2023-08-24 04:15:50,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 136.66666666666666) internal successors, (2460), 18 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:15:50,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:15:50,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:15:50,368 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 04:15:50,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:15:50,568 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:15:50,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:15:50,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1954420070, now seen corresponding path program 3 times [2023-08-24 04:15:50,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:15:50,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848033036] [2023-08-24 04:15:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:15:50,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:15:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:15:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:15:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:15:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848033036] [2023-08-24 04:15:50,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848033036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:15:50,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273089923] [2023-08-24 04:15:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 04:15:50,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:15:50,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:15:50,861 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 04:15:50,865 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 04:15:50,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 04:15:50,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:15:50,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 04:15:50,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:15:51,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 04:15:51,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:15:51,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 04:15:51,157 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 04:15:51,467 INFO L322 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-08-24 04:15:51,467 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 343 treesize of output 320 [2023-08-24 04:15:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:15:51,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:16:17,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:16:17,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 461 treesize of output 269 [2023-08-24 04:16:17,146 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:16:17,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 916 treesize of output 852 [2023-08-24 04:16:17,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:16:17,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 588 treesize of output 480 [2023-08-24 04:16:17,319 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:16:17,319 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 249 treesize of output 269 [2023-08-24 04:16:25,725 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 04:16:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:16:25,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273089923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:16:25,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:16:25,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 04:16:25,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439544049] [2023-08-24 04:16:25,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:16:25,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 04:16:25,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:16:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 04:16:25,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=386, Unknown=1, NotChecked=0, Total=462 [2023-08-24 04:16:25,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 04:16:25,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 130 transitions, 1428 flow. Second operand has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:16:25,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:16:25,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 04:16:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:16:38,862 WARN L234 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:16:41,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:16:47,527 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:16:54,860 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:17:05,357 WARN L234 SmtUtils]: Spent 9.63s on a formula simplification. DAG size of input: 135 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:17:06,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:17:15,101 WARN L234 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:17:22,288 WARN L234 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 111 DAG size of output: 103 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:17:25,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:17:40,595 WARN L234 SmtUtils]: Spent 12.37s on a formula simplification. DAG size of input: 154 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:17:50,657 WARN L234 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 121 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:17:52,065 INFO L124 PetriNetUnfolderBase]: 575/1094 cut-off events. [2023-08-24 04:17:52,065 INFO L125 PetriNetUnfolderBase]: For 6266/6266 co-relation queries the response was YES. [2023-08-24 04:17:52,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 1094 events. 575/1094 cut-off events. For 6266/6266 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5907 event pairs, 88 based on Foata normal form. 11/1104 useless extension candidates. Maximal degree in co-relation 5865. Up to 447 conditions per place. [2023-08-24 04:17:52,073 INFO L140 encePairwiseOnDemand]: 533/544 looper letters, 106 selfloop transitions, 80 changer transitions 73/259 dead transitions. [2023-08-24 04:17:52,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 259 transitions, 2753 flow [2023-08-24 04:17:52,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 04:17:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 04:17:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4127 transitions. [2023-08-24 04:17:52,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24472248576850095 [2023-08-24 04:17:52,080 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4127 transitions. [2023-08-24 04:17:52,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4127 transitions. [2023-08-24 04:17:52,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:17:52,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4127 transitions. [2023-08-24 04:17:52,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 133.1290322580645) internal successors, (4127), 31 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:52,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 544.0) internal successors, (17408), 32 states have internal predecessors, (17408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:52,098 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 544.0) internal successors, (17408), 32 states have internal predecessors, (17408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:52,098 INFO L175 Difference]: Start difference. First operand has 130 places, 130 transitions, 1428 flow. Second operand 31 states and 4127 transitions. [2023-08-24 04:17:52,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 259 transitions, 2753 flow [2023-08-24 04:17:52,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 259 transitions, 2647 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-08-24 04:17:52,130 INFO L231 Difference]: Finished difference. Result has 152 places, 110 transitions, 1356 flow [2023-08-24 04:17:52,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1356, PETRI_PLACES=152, PETRI_TRANSITIONS=110} [2023-08-24 04:17:52,131 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 131 predicate places. [2023-08-24 04:17:52,131 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 110 transitions, 1356 flow [2023-08-24 04:17:52,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:52,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:17:52,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:17:52,144 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 04:17:52,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:17:52,338 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:17:52,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:17:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash 809271084, now seen corresponding path program 2 times [2023-08-24 04:17:52,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:17:52,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803557168] [2023-08-24 04:17:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:17:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:17:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:17:52,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:17:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:17:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803557168] [2023-08-24 04:17:52,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803557168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:17:52,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956624537] [2023-08-24 04:17:52,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 04:17:52,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:17:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:17:52,691 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 04:17:52,698 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 04:17:52,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 04:17:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:17:52,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 04:17:52,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:17:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:17:52,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:17:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:17:53,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956624537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:17:53,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:17:53,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 04:17:53,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974226748] [2023-08-24 04:17:53,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:17:53,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 04:17:53,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:17:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 04:17:53,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 04:17:53,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:17:53,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 110 transitions, 1356 flow. Second operand has 11 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:53,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:17:53,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:17:53,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:17:55,873 INFO L124 PetriNetUnfolderBase]: 326/650 cut-off events. [2023-08-24 04:17:55,873 INFO L125 PetriNetUnfolderBase]: For 4458/4458 co-relation queries the response was YES. [2023-08-24 04:17:55,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3862 conditions, 650 events. 326/650 cut-off events. For 4458/4458 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3158 event pairs, 36 based on Foata normal form. 12/661 useless extension candidates. Maximal degree in co-relation 3812. Up to 233 conditions per place. [2023-08-24 04:17:55,878 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 101 selfloop transitions, 71 changer transitions 0/172 dead transitions. [2023-08-24 04:17:55,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 172 transitions, 2115 flow [2023-08-24 04:17:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 04:17:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 04:17:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3183 transitions. [2023-08-24 04:17:55,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36569393382352944 [2023-08-24 04:17:55,882 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3183 transitions. [2023-08-24 04:17:55,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3183 transitions. [2023-08-24 04:17:55,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:17:55,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3183 transitions. [2023-08-24 04:17:55,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 198.9375) internal successors, (3183), 16 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:55,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 544.0) internal successors, (9248), 17 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:55,892 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 544.0) internal successors, (9248), 17 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:55,892 INFO L175 Difference]: Start difference. First operand has 152 places, 110 transitions, 1356 flow. Second operand 16 states and 3183 transitions. [2023-08-24 04:17:55,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 172 transitions, 2115 flow [2023-08-24 04:17:55,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 172 transitions, 1874 flow, removed 54 selfloop flow, removed 30 redundant places. [2023-08-24 04:17:55,914 INFO L231 Difference]: Finished difference. Result has 123 places, 117 transitions, 1395 flow [2023-08-24 04:17:55,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1395, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2023-08-24 04:17:55,915 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2023-08-24 04:17:55,915 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 1395 flow [2023-08-24 04:17:55,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:17:55,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:17:55,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:17:55,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 04:17:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 04:17:56,128 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:17:56,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:17:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash -944183851, now seen corresponding path program 4 times [2023-08-24 04:17:56,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:17:56,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429238762] [2023-08-24 04:17:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:17:56,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:17:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:17:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 04:17:56,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:17:56,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429238762] [2023-08-24 04:17:56,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429238762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:17:56,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478280262] [2023-08-24 04:17:56,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 04:17:56,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:17:56,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:17:56,377 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 04:17:56,421 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 04:17:56,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 04:17:56,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:17:56,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 04:17:56,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:17:56,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 04:17:56,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:17:56,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:18:08,923 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 04:18:08,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2023-08-24 04:18:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:18:08,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:18:27,214 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:18:27,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-24 04:18:27,222 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:18:27,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 444 [2023-08-24 04:18:27,231 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:18:27,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 81 [2023-08-24 04:18:27,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 04:18:27,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 84 [2023-08-24 04:18:27,448 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 04:18:27,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 1 [2023-08-24 04:18:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:18:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478280262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:18:27,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:18:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-24 04:18:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749734234] [2023-08-24 04:18:27,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:18:27,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 04:18:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:18:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 04:18:27,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=345, Unknown=6, NotChecked=0, Total=420 [2023-08-24 04:18:27,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 04:18:27,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 1395 flow. Second operand has 21 states, 21 states have (on average 129.42857142857142) internal successors, (2718), 21 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:27,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:18:27,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 04:18:27,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:18:28,665 INFO L124 PetriNetUnfolderBase]: 333/674 cut-off events. [2023-08-24 04:18:28,666 INFO L125 PetriNetUnfolderBase]: For 3903/3903 co-relation queries the response was YES. [2023-08-24 04:18:28,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3895 conditions, 674 events. 333/674 cut-off events. For 3903/3903 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3330 event pairs, 51 based on Foata normal form. 8/681 useless extension candidates. Maximal degree in co-relation 3853. Up to 395 conditions per place. [2023-08-24 04:18:28,670 INFO L140 encePairwiseOnDemand]: 534/544 looper letters, 91 selfloop transitions, 41 changer transitions 34/166 dead transitions. [2023-08-24 04:18:28,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 166 transitions, 2015 flow [2023-08-24 04:18:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 04:18:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 04:18:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2766 transitions. [2023-08-24 04:18:28,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2421218487394958 [2023-08-24 04:18:28,674 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2766 transitions. [2023-08-24 04:18:28,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2766 transitions. [2023-08-24 04:18:28,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:18:28,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2766 transitions. [2023-08-24 04:18:28,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.71428571428572) internal successors, (2766), 21 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:28,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 544.0) internal successors, (11968), 22 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:28,685 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 544.0) internal successors, (11968), 22 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:28,686 INFO L175 Difference]: Start difference. First operand has 123 places, 117 transitions, 1395 flow. Second operand 21 states and 2766 transitions. [2023-08-24 04:18:28,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 166 transitions, 2015 flow [2023-08-24 04:18:28,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 166 transitions, 1861 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-08-24 04:18:28,706 INFO L231 Difference]: Finished difference. Result has 139 places, 108 transitions, 1260 flow [2023-08-24 04:18:28,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1260, PETRI_PLACES=139, PETRI_TRANSITIONS=108} [2023-08-24 04:18:28,706 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 118 predicate places. [2023-08-24 04:18:28,706 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 108 transitions, 1260 flow [2023-08-24 04:18:28,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 129.42857142857142) internal successors, (2718), 21 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:28,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:18:28,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:18:28,713 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 04:18:28,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:18:28,913 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:18:28,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:18:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1663458048, now seen corresponding path program 3 times [2023-08-24 04:18:28,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:18:28,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138955949] [2023-08-24 04:18:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:18:28,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:18:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:18:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:29,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:18:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138955949] [2023-08-24 04:18:29,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138955949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:18:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800308326] [2023-08-24 04:18:29,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 04:18:29,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:18:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:18:29,157 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 04:18:29,177 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 04:18:29,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 04:18:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:18:29,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 04:18:29,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:18:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:29,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:18:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:29,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800308326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:18:29,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:18:29,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 04:18:29,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718818612] [2023-08-24 04:18:29,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:18:29,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 04:18:29,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:18:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 04:18:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-24 04:18:29,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:18:29,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 108 transitions, 1260 flow. Second operand has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:29,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:18:29,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:18:29,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:18:32,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:18:32,962 INFO L124 PetriNetUnfolderBase]: 414/792 cut-off events. [2023-08-24 04:18:32,962 INFO L125 PetriNetUnfolderBase]: For 4444/4444 co-relation queries the response was YES. [2023-08-24 04:18:32,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4522 conditions, 792 events. 414/792 cut-off events. For 4444/4444 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3991 event pairs, 71 based on Foata normal form. 10/801 useless extension candidates. Maximal degree in co-relation 4478. Up to 280 conditions per place. [2023-08-24 04:18:32,969 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 123 selfloop transitions, 82 changer transitions 0/205 dead transitions. [2023-08-24 04:18:32,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 205 transitions, 2380 flow [2023-08-24 04:18:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 04:18:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 04:18:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3401 transitions. [2023-08-24 04:18:32,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3677551903114187 [2023-08-24 04:18:32,986 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3401 transitions. [2023-08-24 04:18:32,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3401 transitions. [2023-08-24 04:18:32,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:18:32,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3401 transitions. [2023-08-24 04:18:32,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.05882352941177) internal successors, (3401), 17 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:32,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:32,998 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:32,998 INFO L175 Difference]: Start difference. First operand has 139 places, 108 transitions, 1260 flow. Second operand 17 states and 3401 transitions. [2023-08-24 04:18:32,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 205 transitions, 2380 flow [2023-08-24 04:18:33,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 205 transitions, 2279 flow, removed 14 selfloop flow, removed 13 redundant places. [2023-08-24 04:18:33,019 INFO L231 Difference]: Finished difference. Result has 134 places, 142 transitions, 1842 flow [2023-08-24 04:18:33,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1842, PETRI_PLACES=134, PETRI_TRANSITIONS=142} [2023-08-24 04:18:33,020 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-08-24 04:18:33,020 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 142 transitions, 1842 flow [2023-08-24 04:18:33,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.0) internal successors, (2340), 12 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:33,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:18:33,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:18:33,029 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 04:18:33,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:18:33,228 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:18:33,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:18:33,228 INFO L85 PathProgramCache]: Analyzing trace with hash -935165372, now seen corresponding path program 4 times [2023-08-24 04:18:33,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:18:33,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644424117] [2023-08-24 04:18:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:18:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:18:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:18:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:33,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:18:33,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644424117] [2023-08-24 04:18:33,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644424117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:18:33,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119408224] [2023-08-24 04:18:33,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 04:18:33,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:18:33,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:18:33,460 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 04:18:33,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 04:18:33,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 04:18:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:18:33,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 04:18:33,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:18:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:33,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:18:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119408224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:18:33,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:18:33,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 04:18:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656995374] [2023-08-24 04:18:33,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:18:33,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 04:18:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:18:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 04:18:33,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-24 04:18:33,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 04:18:33,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 142 transitions, 1842 flow. Second operand has 12 states, 12 states have (on average 195.33333333333334) internal successors, (2344), 12 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:33,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:18:33,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 04:18:33,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:18:35,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:18:37,220 INFO L124 PetriNetUnfolderBase]: 422/814 cut-off events. [2023-08-24 04:18:37,220 INFO L125 PetriNetUnfolderBase]: For 5758/5758 co-relation queries the response was YES. [2023-08-24 04:18:37,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5054 conditions, 814 events. 422/814 cut-off events. For 5758/5758 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4197 event pairs, 65 based on Foata normal form. 28/841 useless extension candidates. Maximal degree in co-relation 5005. Up to 289 conditions per place. [2023-08-24 04:18:37,227 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 125 selfloop transitions, 88 changer transitions 0/213 dead transitions. [2023-08-24 04:18:37,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 213 transitions, 2668 flow [2023-08-24 04:18:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 04:18:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 04:18:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3795 transitions. [2023-08-24 04:18:37,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36716331269349844 [2023-08-24 04:18:37,238 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3795 transitions. [2023-08-24 04:18:37,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3795 transitions. [2023-08-24 04:18:37,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:18:37,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3795 transitions. [2023-08-24 04:18:37,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 199.73684210526315) internal successors, (3795), 19 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:37,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 544.0) internal successors, (10880), 20 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:37,250 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 544.0) internal successors, (10880), 20 states have internal predecessors, (10880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:37,250 INFO L175 Difference]: Start difference. First operand has 134 places, 142 transitions, 1842 flow. Second operand 19 states and 3795 transitions. [2023-08-24 04:18:37,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 213 transitions, 2668 flow [2023-08-24 04:18:37,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 213 transitions, 2463 flow, removed 96 selfloop flow, removed 3 redundant places. [2023-08-24 04:18:37,283 INFO L231 Difference]: Finished difference. Result has 153 places, 151 transitions, 1988 flow [2023-08-24 04:18:37,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1988, PETRI_PLACES=153, PETRI_TRANSITIONS=151} [2023-08-24 04:18:37,284 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2023-08-24 04:18:37,284 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 151 transitions, 1988 flow [2023-08-24 04:18:37,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.33333333333334) internal successors, (2344), 12 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:18:37,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:18:37,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:18:37,295 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 04:18:37,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 04:18:37,490 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 04:18:37,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:18:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -978928776, now seen corresponding path program 5 times [2023-08-24 04:18:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:18:37,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424758424] [2023-08-24 04:18:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:18:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:18:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:18:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:18:37,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:18:37,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424758424] [2023-08-24 04:18:37,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424758424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 04:18:37,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891963267] [2023-08-24 04:18:37,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 04:18:37,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 04:18:37,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:18:37,685 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 04:18:37,691 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 04:18:37,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 04:18:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 04:18:37,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 04:18:37,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 04:18:37,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 04:18:37,945 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:18:37,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 04:18:38,251 INFO L322 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-08-24 04:18:38,251 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 339 treesize of output 313 [2023-08-24 04:18:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 04:18:38,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 04:19:52,580 WARN L234 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 190 DAG size of output: 164 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:19:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 04:19:53,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891963267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 04:19:53,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 04:19:53,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 20 [2023-08-24 04:19:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429898853] [2023-08-24 04:19:53,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 04:19:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 04:19:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:19:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 04:19:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-08-24 04:19:53,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 04:19:53,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 151 transitions, 1988 flow. Second operand has 20 states, 20 states have (on average 128.95) internal successors, (2579), 20 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 04:19:53,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:19:53,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 04:19:53,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:20:02,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:22:22,993 WARN L234 SmtUtils]: Spent 2.30m on a formula simplification. DAG size of input: 242 DAG size of output: 227 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:22:30,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:22:32,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:22:34,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:22:36,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:22:38,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:23:45,808 WARN L234 SmtUtils]: Spent 1.07m on a formula simplification. DAG size of input: 239 DAG size of output: 223 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:23:48,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:23:49,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:24:52,877 WARN L234 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 242 DAG size of output: 194 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:25:12,905 WARN L234 SmtUtils]: Spent 15.45s on a formula simplification. DAG size of input: 150 DAG size of output: 147 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 04:25:16,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:25:19,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:25:22,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:25:24,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:25:27,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:25:29,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:26:17,168 WARN L234 SmtUtils]: Spent 38.82s on a formula simplification. DAG size of input: 239 DAG size of output: 191 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-24 04:26:17,665 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 04:26:17,665 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 04:26:18,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 04:26:18,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 04:26:18,865 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-24 04:26:18,886 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 04:26:18,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 04:26:18,886 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-24 04:26:18,887 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 04:26:18,887 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 04:26:18,888 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 4, 1] [2023-08-24 04:26:18,891 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 04:26:18,891 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 04:26:18,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:26:18 BasicIcfg [2023-08-24 04:26:18,893 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 04:26:18,893 INFO L158 Benchmark]: Toolchain (without parser) took 849458.31ms. Allocated memory was 379.6MB in the beginning and 551.6MB in the end (delta: 172.0MB). Free memory was 356.4MB in the beginning and 236.2MB in the end (delta: 120.2MB). Peak memory consumption was 293.7MB. Max. memory is 16.0GB. [2023-08-24 04:26:18,893 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 379.6MB. Free memory is still 356.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 04:26:18,894 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.90ms. Allocated memory is still 379.6MB. Free memory was 355.9MB in the beginning and 344.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 04:26:18,894 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.90ms. Allocated memory is still 379.6MB. Free memory was 343.8MB in the beginning and 341.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 04:26:18,894 INFO L158 Benchmark]: Boogie Preprocessor took 24.39ms. Allocated memory is still 379.6MB. Free memory was 341.7MB in the beginning and 340.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 04:26:18,894 INFO L158 Benchmark]: RCFGBuilder took 547.31ms. Allocated memory is still 379.6MB. Free memory was 340.1MB in the beginning and 319.3MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 04:26:18,894 INFO L158 Benchmark]: TraceAbstraction took 848601.14ms. Allocated memory was 379.6MB in the beginning and 551.6MB in the end (delta: 172.0MB). Free memory was 318.6MB in the beginning and 236.2MB in the end (delta: 82.4MB). Peak memory consumption was 255.9MB. Max. memory is 16.0GB. [2023-08-24 04:26:18,895 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2023-08-24 04:26:18,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 379.6MB. Free memory is still 356.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 223.90ms. Allocated memory is still 379.6MB. Free memory was 355.9MB in the beginning and 344.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.90ms. Allocated memory is still 379.6MB. Free memory was 343.8MB in the beginning and 341.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.39ms. Allocated memory is still 379.6MB. Free memory was 341.7MB in the beginning and 340.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 547.31ms. Allocated memory is still 379.6MB. Free memory was 340.1MB in the beginning and 319.3MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 848601.14ms. Allocated memory was 379.6MB in the beginning and 551.6MB in the end (delta: 172.0MB). Free memory was 318.6MB in the beginning and 236.2MB in the end (delta: 82.4MB). Peak memory consumption was 255.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 24.1s, 224 PlacesBefore, 21 PlacesAfterwards, 241 TransitionsBefore, 17 TransitionsAfterwards, 6892 CoEnabledTransitionPairs, 8 FixpointIterations, 66 TrivialSequentialCompositions, 139 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 52 ConcurrentYvCompositions, 21 ChoiceCompositions, 293 TotalNumberOfCompositions, 6480 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6386, independent: 6375, independent conditional: 0, independent unconditional: 6375, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4073, independent: 4067, independent conditional: 0, independent unconditional: 4067, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6386, independent: 2308, independent conditional: 0, independent unconditional: 2308, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 4073, unknown conditional: 0, unknown unconditional: 4073] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 364 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 848.4s, OverallIterations: 16, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 574.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 24.3s, HoareTripleCheckerStatistics: 68 mSolverCounterUnknown, 1156 SdHoareTripleChecker+Valid, 92.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1156 mSDsluCounter, 353 SdHoareTripleChecker+Invalid, 91.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 116 IncrementalHoareTripleChecker+Unchecked, 295 mSDsCounter, 294 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5420 IncrementalHoareTripleChecker+Invalid, 5899 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 294 mSolverCounterUnsat, 58 mSDtfsCounter, 5420 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 588 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 297 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 502.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1988occurred in iteration=15, InterpolantAutomatonStates: 219, 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: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 245.4s InterpolantComputationTime, 402 NumberOfCodeBlocks, 402 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 517 ConstructedInterpolants, 15 QuantifiedInterpolants, 17371 SizeOfPredicates, 250 NumberOfNonLiveVariables, 1538 ConjunctsInSsa, 281 ConjunctsInUnsatCore, 34 InterpolantComputations, 7 PerfectInterpolantSequences, 45/90 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