/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:42:28,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:42:28,783 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 13:42:28,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:42:28,790 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:42:28,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:42:28,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:42:28,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:42:28,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:42:28,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:42:28,824 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:42:28,825 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:42:28,825 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:42:28,825 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:42:28,826 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:42:28,826 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:42:28,826 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:42:28,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:42:28,827 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:42:28,827 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:42:28,827 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:42:28,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:42:28,828 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:42:28,828 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:42:28,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:42:28,829 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:42:28,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:42:28,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:42:28,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:42:28,830 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:42:28,830 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:42:28,830 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:42:28,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:42:28,831 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:42:28,831 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:42:28,831 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:42:29,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:42:29,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:42:29,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:42:29,185 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:42:29,185 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:42:29,187 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-24 13:42:30,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:42:30,716 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:42:30,717 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c [2023-08-24 13:42:30,722 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fac19fe/c6bef8973af945ccacaadf9b77e9043e/FLAGf41531fb7 [2023-08-24 13:42:30,739 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4fac19fe/c6bef8973af945ccacaadf9b77e9043e [2023-08-24 13:42:30,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:42:30,742 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:42:30,743 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:42:30,743 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:42:30,745 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:42:30,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:42:30" (1/1) ... [2023-08-24 13:42:30,746 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fe5c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:30, skipping insertion in model container [2023-08-24 13:42:30,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:42:30" (1/1) ... [2023-08-24 13:42:30,764 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:42:30,938 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-24 13:42:30,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:42:30,960 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:42:30,995 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2023-08-24 13:42:30,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:42:31,012 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:42:31,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31 WrapperNode [2023-08-24 13:42:31,016 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:42:31,017 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:42:31,017 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:42:31,017 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:42:31,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,075 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 200 [2023-08-24 13:42:31,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:42:31,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:42:31,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:42:31,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:42:31,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,098 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,115 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,127 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:42:31,127 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:42:31,128 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:42:31,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:42:31,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (1/1) ... [2023-08-24 13:42:31,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:42:31,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:31,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 13:42:31,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 13:42:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:42:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:42:31,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:42:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:42:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 13:42:31,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 13:42:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 13:42:31,194 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 13:42:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:42:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:42:31,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:42:31,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:42:31,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:42:31,196 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 13:42:31,294 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:42:31,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:42:31,584 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:42:31,593 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:42:31,594 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 13:42:31,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:42:31 BoogieIcfgContainer [2023-08-24 13:42:31,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:42:31,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:42:31,598 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:42:31,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:42:31,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:42:30" (1/3) ... [2023-08-24 13:42:31,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301c7c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:42:31, skipping insertion in model container [2023-08-24 13:42:31,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:42:31" (2/3) ... [2023-08-24 13:42:31,602 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@301c7c2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:42:31, skipping insertion in model container [2023-08-24 13:42:31,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:42:31" (3/3) ... [2023-08-24 13:42:31,603 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2023-08-24 13:42:31,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:42:31,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:42:31,619 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:42:31,737 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 13:42:31,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 233 transitions, 482 flow [2023-08-24 13:42:31,864 INFO L124 PetriNetUnfolderBase]: 21/231 cut-off events. [2023-08-24 13:42:31,864 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 13:42:31,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 231 events. 21/231 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-24 13:42:31,873 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 233 transitions, 482 flow [2023-08-24 13:42:31,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 223 transitions, 458 flow [2023-08-24 13:42:31,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:42:31,891 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 223 transitions, 458 flow [2023-08-24 13:42:31,894 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 223 transitions, 458 flow [2023-08-24 13:42:31,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 223 transitions, 458 flow [2023-08-24 13:42:31,934 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-08-24 13:42:31,935 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 13:42:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 265 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 151. Up to 2 conditions per place. [2023-08-24 13:42:31,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 5400 [2023-08-24 13:42:37,852 INFO L134 LiptonReduction]: Checked pairs total: 5253 [2023-08-24 13:42:37,852 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-24 13:42:37,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:42:37,884 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;@117a283e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:42:37,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 13:42:37,892 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:42:37,892 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2023-08-24 13:42:37,892 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 13:42:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:37,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:37,897 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 13:42:37,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash 181766865, now seen corresponding path program 1 times [2023-08-24 13:42:37,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:37,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870444180] [2023-08-24 13:42:37,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:37,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:42:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:38,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870444180] [2023-08-24 13:42:38,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870444180] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:38,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:42:38,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:42:38,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971442015] [2023-08-24 13:42:38,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:42:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:42:38,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:42:38,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 488 [2023-08-24 13:42:38,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:38,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 488 [2023-08-24 13:42:38,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:38,393 INFO L124 PetriNetUnfolderBase]: 53/98 cut-off events. [2023-08-24 13:42:38,393 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-24 13:42:38,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 98 events. 53/98 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 33 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 160. Up to 97 conditions per place. [2023-08-24 13:42:38,396 INFO L140 encePairwiseOnDemand]: 483/488 looper letters, 18 selfloop transitions, 4 changer transitions 0/22 dead transitions. [2023-08-24 13:42:38,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 100 flow [2023-08-24 13:42:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:42:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:42:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-08-24 13:42:38,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39959016393442626 [2023-08-24 13:42:38,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-08-24 13:42:38,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-08-24 13:42:38,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:38,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-08-24 13:42:38,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 488.0) internal successors, (1952), 4 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,432 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 52 flow. Second operand 3 states and 585 transitions. [2023-08-24 13:42:38,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 100 flow [2023-08-24 13:42:38,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 92 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 13:42:38,438 INFO L231 Difference]: Finished difference. Result has 22 places, 22 transitions, 66 flow [2023-08-24 13:42:38,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=22, PETRI_TRANSITIONS=22} [2023-08-24 13:42:38,444 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-24 13:42:38,444 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 22 transitions, 66 flow [2023-08-24 13:42:38,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:38,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:38,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:42:38,445 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 13:42:38,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash 327526380, now seen corresponding path program 1 times [2023-08-24 13:42:38,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:38,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917402229] [2023-08-24 13:42:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:38,636 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 13:42:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917402229] [2023-08-24 13:42:38,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917402229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:38,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094398009] [2023-08-24 13:42:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:38,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:38,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:38,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 13:42:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:38,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-24 13:42:38,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:38,832 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 13:42:38,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:38,859 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 13:42:38,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094398009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:38,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:38,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-24 13:42:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806735979] [2023-08-24 13:42:38,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:38,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 13:42:38,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 13:42:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:42:38,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 488 [2023-08-24 13:42:38,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 22 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:38,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 488 [2023-08-24 13:42:38,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:38,946 INFO L124 PetriNetUnfolderBase]: 53/104 cut-off events. [2023-08-24 13:42:38,946 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 13:42:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 104 events. 53/104 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 192 event pairs, 33 based on Foata normal form. 3/88 useless extension candidates. Maximal degree in co-relation 202. Up to 97 conditions per place. [2023-08-24 13:42:38,948 INFO L140 encePairwiseOnDemand]: 483/488 looper letters, 18 selfloop transitions, 10 changer transitions 0/28 dead transitions. [2023-08-24 13:42:38,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 146 flow [2023-08-24 13:42:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:42:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:42:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1156 transitions. [2023-08-24 13:42:38,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948087431693989 [2023-08-24 13:42:38,954 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1156 transitions. [2023-08-24 13:42:38,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1156 transitions. [2023-08-24 13:42:38,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:38,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1156 transitions. [2023-08-24 13:42:38,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.66666666666666) internal successors, (1156), 6 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,984 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 488.0) internal successors, (3416), 7 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,984 INFO L175 Difference]: Start difference. First operand has 22 places, 22 transitions, 66 flow. Second operand 6 states and 1156 transitions. [2023-08-24 13:42:38,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 146 flow [2023-08-24 13:42:38,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:42:38,986 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 128 flow [2023-08-24 13:42:38,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-24 13:42:38,987 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2023-08-24 13:42:38,987 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 128 flow [2023-08-24 13:42:38,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:38,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:38,988 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:39,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 13:42:39,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:39,195 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 13:42:39,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash -25694023, now seen corresponding path program 2 times [2023-08-24 13:42:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:39,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150452664] [2023-08-24 13:42:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:39,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 13:42:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:39,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150452664] [2023-08-24 13:42:39,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150452664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:39,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674851092] [2023-08-24 13:42:39,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:42:39,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:39,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:39,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:39,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 13:42:39,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:42:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:39,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 13:42:39,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:42:39,498 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:42:39,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674851092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:39,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:42:39,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-24 13:42:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732190329] [2023-08-24 13:42:39,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:39,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:42:39,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:39,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:42:39,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:42:39,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 488 [2023-08-24 13:42:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:39,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:39,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 488 [2023-08-24 13:42:39,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:39,604 INFO L124 PetriNetUnfolderBase]: 88/171 cut-off events. [2023-08-24 13:42:39,604 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 13:42:39,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 88/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 486 event pairs, 33 based on Foata normal form. 4/140 useless extension candidates. Maximal degree in co-relation 330. Up to 105 conditions per place. [2023-08-24 13:42:39,606 INFO L140 encePairwiseOnDemand]: 484/488 looper letters, 41 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2023-08-24 13:42:39,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 46 transitions, 260 flow [2023-08-24 13:42:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:42:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:42:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 831 transitions. [2023-08-24 13:42:39,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257172131147541 [2023-08-24 13:42:39,609 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 831 transitions. [2023-08-24 13:42:39,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 831 transitions. [2023-08-24 13:42:39,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:39,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 831 transitions. [2023-08-24 13:42:39,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:39,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:39,616 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:39,617 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 128 flow. Second operand 4 states and 831 transitions. [2023-08-24 13:42:39,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 46 transitions, 260 flow [2023-08-24 13:42:39,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 244 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 13:42:39,619 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 132 flow [2023-08-24 13:42:39,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-24 13:42:39,620 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 10 predicate places. [2023-08-24 13:42:39,620 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 132 flow [2023-08-24 13:42:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:39,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:39,621 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:39,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 13:42:39,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 13:42:39,828 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 13:42:39,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1162278063, now seen corresponding path program 3 times [2023-08-24 13:42:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:39,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712773548] [2023-08-24 13:42:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 13:42:39,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712773548] [2023-08-24 13:42:39,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712773548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:39,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650839527] [2023-08-24 13:42:39,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:42:39,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:39,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:39,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:39,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 13:42:40,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 13:42:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:40,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 13:42:40,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-24 13:42:40,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:42:40,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650839527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:40,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:42:40,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-08-24 13:42:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837806559] [2023-08-24 13:42:40,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:40,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:42:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:42:40,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:42:40,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 488 [2023-08-24 13:42:40,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:40,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 488 [2023-08-24 13:42:40,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:40,225 INFO L124 PetriNetUnfolderBase]: 136/259 cut-off events. [2023-08-24 13:42:40,225 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-24 13:42:40,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 259 events. 136/259 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 849 event pairs, 60 based on Foata normal form. 2/224 useless extension candidates. Maximal degree in co-relation 602. Up to 176 conditions per place. [2023-08-24 13:42:40,231 INFO L140 encePairwiseOnDemand]: 484/488 looper letters, 48 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-24 13:42:40,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 304 flow [2023-08-24 13:42:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:42:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:42:40,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 830 transitions. [2023-08-24 13:42:40,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42520491803278687 [2023-08-24 13:42:40,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 830 transitions. [2023-08-24 13:42:40,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 830 transitions. [2023-08-24 13:42:40,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:40,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 830 transitions. [2023-08-24 13:42:40,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.5) internal successors, (830), 4 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,247 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,247 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 132 flow. Second operand 4 states and 830 transitions. [2023-08-24 13:42:40,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 304 flow [2023-08-24 13:42:40,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:42:40,254 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 150 flow [2023-08-24 13:42:40,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-24 13:42:40,255 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 14 predicate places. [2023-08-24 13:42:40,256 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 150 flow [2023-08-24 13:42:40,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:40,256 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:40,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 13:42:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:40,463 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 13:42:40,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 686901045, now seen corresponding path program 4 times [2023-08-24 13:42:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386441961] [2023-08-24 13:42:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 13:42:40,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:40,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386441961] [2023-08-24 13:42:40,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386441961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:40,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118539251] [2023-08-24 13:42:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:42:40,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:40,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:40,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:40,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 13:42:40,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:42:40,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:40,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 13:42:40,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 13:42:40,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 13:42:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118539251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:40,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:40,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 13:42:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730496392] [2023-08-24 13:42:40,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:40,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 13:42:40,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 13:42:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-08-24 13:42:40,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 488 [2023-08-24 13:42:40,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:40,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 488 [2023-08-24 13:42:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:40,906 INFO L124 PetriNetUnfolderBase]: 136/261 cut-off events. [2023-08-24 13:42:40,906 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-08-24 13:42:40,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 261 events. 136/261 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 803 event pairs, 104 based on Foata normal form. 1/243 useless extension candidates. Maximal degree in co-relation 722. Up to 252 conditions per place. [2023-08-24 13:42:40,908 INFO L140 encePairwiseOnDemand]: 483/488 looper letters, 22 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-08-24 13:42:40,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 230 flow [2023-08-24 13:42:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:42:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:42:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1341 transitions. [2023-08-24 13:42:40,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39256440281030447 [2023-08-24 13:42:40,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1341 transitions. [2023-08-24 13:42:40,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1341 transitions. [2023-08-24 13:42:40,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:40,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1341 transitions. [2023-08-24 13:42:40,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.57142857142858) internal successors, (1341), 7 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 488.0) internal successors, (3904), 8 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,920 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 488.0) internal successors, (3904), 8 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,920 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 150 flow. Second operand 7 states and 1341 transitions. [2023-08-24 13:42:40,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 230 flow [2023-08-24 13:42:40,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 226 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 13:42:40,922 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 192 flow [2023-08-24 13:42:40,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-24 13:42:40,923 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-08-24 13:42:40,923 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 192 flow [2023-08-24 13:42:40,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:40,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:40,924 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:40,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 13:42:41,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:41,130 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 13:42:41,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -938851450, now seen corresponding path program 5 times [2023-08-24 13:42:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954103626] [2023-08-24 13:42:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:41,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:41,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954103626] [2023-08-24 13:42:41,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954103626] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:41,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:42:41,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:42:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90338414] [2023-08-24 13:42:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:42:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:42:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:42:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 488 [2023-08-24 13:42:41,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:41,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 488 [2023-08-24 13:42:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:41,463 INFO L124 PetriNetUnfolderBase]: 158/299 cut-off events. [2023-08-24 13:42:41,463 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-08-24 13:42:41,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 299 events. 158/299 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1059 event pairs, 18 based on Foata normal form. 16/297 useless extension candidates. Maximal degree in co-relation 778. Up to 246 conditions per place. [2023-08-24 13:42:41,465 INFO L140 encePairwiseOnDemand]: 482/488 looper letters, 45 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-24 13:42:41,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 352 flow [2023-08-24 13:42:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:42:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:42:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 826 transitions. [2023-08-24 13:42:41,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42315573770491804 [2023-08-24 13:42:41,468 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 826 transitions. [2023-08-24 13:42:41,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 826 transitions. [2023-08-24 13:42:41,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:41,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 826 transitions. [2023-08-24 13:42:41,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.5) internal successors, (826), 4 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,474 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,475 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 192 flow. Second operand 4 states and 826 transitions. [2023-08-24 13:42:41,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 352 flow [2023-08-24 13:42:41,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 328 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 13:42:41,477 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 199 flow [2023-08-24 13:42:41,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-24 13:42:41,478 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2023-08-24 13:42:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 199 flow [2023-08-24 13:42:41,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:41,479 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:41,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 13:42:41,479 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 13:42:41,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:41,480 INFO L85 PathProgramCache]: Analyzing trace with hash 515873958, now seen corresponding path program 6 times [2023-08-24 13:42:41,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:41,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379930344] [2023-08-24 13:42:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:41,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:41,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:41,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379930344] [2023-08-24 13:42:41,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379930344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:41,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:42:41,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:42:41,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483513660] [2023-08-24 13:42:41,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:41,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:42:41,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:41,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:42:41,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:42:41,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 488 [2023-08-24 13:42:41,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:41,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 488 [2023-08-24 13:42:41,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:41,770 INFO L124 PetriNetUnfolderBase]: 160/299 cut-off events. [2023-08-24 13:42:41,770 INFO L125 PetriNetUnfolderBase]: For 377/377 co-relation queries the response was YES. [2023-08-24 13:42:41,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 942 conditions, 299 events. 160/299 cut-off events. For 377/377 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 971 event pairs, 34 based on Foata normal form. 8/285 useless extension candidates. Maximal degree in co-relation 872. Up to 206 conditions per place. [2023-08-24 13:42:41,772 INFO L140 encePairwiseOnDemand]: 482/488 looper letters, 45 selfloop transitions, 6 changer transitions 1/52 dead transitions. [2023-08-24 13:42:41,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 367 flow [2023-08-24 13:42:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:42:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:42:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 825 transitions. [2023-08-24 13:42:41,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42264344262295084 [2023-08-24 13:42:41,775 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 825 transitions. [2023-08-24 13:42:41,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 825 transitions. [2023-08-24 13:42:41,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:41,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 825 transitions. [2023-08-24 13:42:41,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.25) internal successors, (825), 4 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,780 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,780 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 199 flow. Second operand 4 states and 825 transitions. [2023-08-24 13:42:41,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 367 flow [2023-08-24 13:42:41,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 52 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:42:41,783 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 234 flow [2023-08-24 13:42:41,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-24 13:42:41,784 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 25 predicate places. [2023-08-24 13:42:41,784 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 234 flow [2023-08-24 13:42:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:41,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:41,784 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:41,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 13:42:41,785 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 13:42:41,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -508901539, now seen corresponding path program 1 times [2023-08-24 13:42:41,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:41,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688343602] [2023-08-24 13:42:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688343602] [2023-08-24 13:42:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688343602] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:42,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:42:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:42:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340263896] [2023-08-24 13:42:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:42,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:42:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:42:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:42:42,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 488 [2023-08-24 13:42:42,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:42,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 488 [2023-08-24 13:42:42,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:42,175 INFO L124 PetriNetUnfolderBase]: 145/270 cut-off events. [2023-08-24 13:42:42,176 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2023-08-24 13:42:42,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 270 events. 145/270 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 884 event pairs, 40 based on Foata normal form. 6/258 useless extension candidates. Maximal degree in co-relation 847. Up to 182 conditions per place. [2023-08-24 13:42:42,178 INFO L140 encePairwiseOnDemand]: 483/488 looper letters, 50 selfloop transitions, 6 changer transitions 3/59 dead transitions. [2023-08-24 13:42:42,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 447 flow [2023-08-24 13:42:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:42:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:42:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 831 transitions. [2023-08-24 13:42:42,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257172131147541 [2023-08-24 13:42:42,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 831 transitions. [2023-08-24 13:42:42,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 831 transitions. [2023-08-24 13:42:42,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:42,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 831 transitions. [2023-08-24 13:42:42,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.75) internal successors, (831), 4 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,185 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 234 flow. Second operand 4 states and 831 transitions. [2023-08-24 13:42:42,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 447 flow [2023-08-24 13:42:42,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 439 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 13:42:42,188 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 254 flow [2023-08-24 13:42:42,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-24 13:42:42,188 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-08-24 13:42:42,189 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 254 flow [2023-08-24 13:42:42,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:42,189 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:42,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 13:42:42,190 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 13:42:42,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash 358125771, now seen corresponding path program 1 times [2023-08-24 13:42:42,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:42,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350845034] [2023-08-24 13:42:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:42,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:42,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350845034] [2023-08-24 13:42:42,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350845034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:42:42,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:42:42,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:42:42,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030631800] [2023-08-24 13:42:42,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:42:42,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:42:42,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:42,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:42:42,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:42:42,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 488 [2023-08-24 13:42:42,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:42,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 488 [2023-08-24 13:42:42,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:42,522 INFO L124 PetriNetUnfolderBase]: 125/230 cut-off events. [2023-08-24 13:42:42,523 INFO L125 PetriNetUnfolderBase]: For 650/650 co-relation queries the response was YES. [2023-08-24 13:42:42,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 230 events. 125/230 cut-off events. For 650/650 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 641 event pairs, 51 based on Foata normal form. 12/224 useless extension candidates. Maximal degree in co-relation 783. Up to 177 conditions per place. [2023-08-24 13:42:42,525 INFO L140 encePairwiseOnDemand]: 484/488 looper letters, 48 selfloop transitions, 7 changer transitions 1/56 dead transitions. [2023-08-24 13:42:42,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 446 flow [2023-08-24 13:42:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:42:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:42:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2023-08-24 13:42:42,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42469262295081966 [2023-08-24 13:42:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2023-08-24 13:42:42,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2023-08-24 13:42:42,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:42,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2023-08-24 13:42:42,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 488.0) internal successors, (2440), 5 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,561 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 254 flow. Second operand 4 states and 829 transitions. [2023-08-24 13:42:42,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 446 flow [2023-08-24 13:42:42,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 426 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 13:42:42,564 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 271 flow [2023-08-24 13:42:42,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=271, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2023-08-24 13:42:42,564 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 28 predicate places. [2023-08-24 13:42:42,565 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 271 flow [2023-08-24 13:42:42,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:42,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:42,565 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 13:42:42,566 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 13:42:42,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1911512066, now seen corresponding path program 1 times [2023-08-24 13:42:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235053239] [2023-08-24 13:42:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235053239] [2023-08-24 13:42:43,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235053239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:43,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149945564] [2023-08-24 13:42:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:43,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:43,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 13:42:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:43,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:42:43,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:43,742 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:43,742 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 27 treesize of output 19 [2023-08-24 13:42:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:43,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:44,504 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:42:44,505 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 42 treesize of output 50 [2023-08-24 13:42:44,540 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:44,540 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 34 treesize of output 1 [2023-08-24 13:42:44,544 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:44,545 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 34 treesize of output 1 [2023-08-24 13:42:44,549 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:44,549 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 34 treesize of output 1 [2023-08-24 13:42:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:44,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149945564] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:44,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:44,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-24 13:42:44,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107025717] [2023-08-24 13:42:44,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:44,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 13:42:44,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:44,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 13:42:44,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-08-24 13:42:44,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:42:44,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 271 flow. Second operand has 24 states, 24 states have (on average 165.04166666666666) internal successors, (3961), 24 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:44,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:44,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:42:44,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:45,491 INFO L124 PetriNetUnfolderBase]: 231/416 cut-off events. [2023-08-24 13:42:45,491 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2023-08-24 13:42:45,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 416 events. 231/416 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1527 event pairs, 12 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1429. Up to 150 conditions per place. [2023-08-24 13:42:45,494 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 76 selfloop transitions, 28 changer transitions 2/106 dead transitions. [2023-08-24 13:42:45,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 106 transitions, 790 flow [2023-08-24 13:42:45,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:42:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:42:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2365 transitions. [2023-08-24 13:42:45,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34616510538641687 [2023-08-24 13:42:45,501 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2365 transitions. [2023-08-24 13:42:45,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2365 transitions. [2023-08-24 13:42:45,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:45,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2365 transitions. [2023-08-24 13:42:45,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.92857142857142) internal successors, (2365), 14 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:45,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:45,515 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:45,515 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 271 flow. Second operand 14 states and 2365 transitions. [2023-08-24 13:42:45,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 106 transitions, 790 flow [2023-08-24 13:42:45,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 736 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-24 13:42:45,520 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 478 flow [2023-08-24 13:42:45,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=478, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-08-24 13:42:45,520 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 46 predicate places. [2023-08-24 13:42:45,521 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 478 flow [2023-08-24 13:42:45,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 165.04166666666666) internal successors, (3961), 24 states have internal predecessors, (3961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:45,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:45,522 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:45,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 13:42:45,728 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,SelfDestructingSolverStorable9 [2023-08-24 13:42:45,728 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 13:42:45,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1065751248, now seen corresponding path program 2 times [2023-08-24 13:42:45,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:45,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668383259] [2023-08-24 13:42:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:45,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:46,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:46,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668383259] [2023-08-24 13:42:46,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668383259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:46,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920501016] [2023-08-24 13:42:46,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:42:46,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:46,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:46,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:46,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 13:42:46,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:42:46,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:46,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:42:46,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:46,990 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:46,991 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 27 treesize of output 19 [2023-08-24 13:42:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:47,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:47,785 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:42:47,786 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 50 treesize of output 50 [2023-08-24 13:42:47,827 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:47,827 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 34 treesize of output 1 [2023-08-24 13:42:47,832 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:47,832 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 34 treesize of output 1 [2023-08-24 13:42:47,836 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:47,837 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 34 treesize of output 1 [2023-08-24 13:42:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:47,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920501016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:47,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:47,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:42:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771527358] [2023-08-24 13:42:47,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:47,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:42:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:42:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:42:47,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:42:47,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 478 flow. Second operand has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:47,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:47,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:42:47,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:48,558 INFO L124 PetriNetUnfolderBase]: 262/470 cut-off events. [2023-08-24 13:42:48,559 INFO L125 PetriNetUnfolderBase]: For 1760/1760 co-relation queries the response was YES. [2023-08-24 13:42:48,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 470 events. 262/470 cut-off events. For 1760/1760 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1784 event pairs, 36 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1971. Up to 334 conditions per place. [2023-08-24 13:42:48,563 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 70 selfloop transitions, 24 changer transitions 1/95 dead transitions. [2023-08-24 13:42:48,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 95 transitions, 888 flow [2023-08-24 13:42:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:42:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:42:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1853 transitions. [2023-08-24 13:42:48,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345193740685544 [2023-08-24 13:42:48,568 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1853 transitions. [2023-08-24 13:42:48,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1853 transitions. [2023-08-24 13:42:48,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:48,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1853 transitions. [2023-08-24 13:42:48,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.45454545454547) internal successors, (1853), 11 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:48,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:48,579 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:48,579 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 478 flow. Second operand 11 states and 1853 transitions. [2023-08-24 13:42:48,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 95 transitions, 888 flow [2023-08-24 13:42:48,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 95 transitions, 850 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-24 13:42:48,587 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 624 flow [2023-08-24 13:42:48,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=624, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2023-08-24 13:42:48,587 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 59 predicate places. [2023-08-24 13:42:48,587 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 624 flow [2023-08-24 13:42:48,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:48,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:48,589 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:48,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 13:42:48,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:48,793 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 13:42:48,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1104755152, now seen corresponding path program 3 times [2023-08-24 13:42:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:48,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356163351] [2023-08-24 13:42:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:48,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:49,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356163351] [2023-08-24 13:42:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356163351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362997826] [2023-08-24 13:42:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:42:49,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:49,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:49,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 13:42:49,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:42:49,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:49,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:42:49,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:49,878 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:49,878 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 27 treesize of output 19 [2023-08-24 13:42:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:49,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:50,581 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:42:50,582 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 50 treesize of output 50 [2023-08-24 13:42:50,613 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:50,614 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 34 treesize of output 1 [2023-08-24 13:42:50,617 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:50,618 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 34 treesize of output 1 [2023-08-24 13:42:50,622 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:50,622 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 34 treesize of output 1 [2023-08-24 13:42:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362997826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:50,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:50,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:42:50,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882932579] [2023-08-24 13:42:50,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:50,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:42:50,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:42:50,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:42:50,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:42:50,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 624 flow. Second operand has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:50,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:50,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:42:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:51,444 INFO L124 PetriNetUnfolderBase]: 295/528 cut-off events. [2023-08-24 13:42:51,444 INFO L125 PetriNetUnfolderBase]: For 2918/2918 co-relation queries the response was YES. [2023-08-24 13:42:51,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2598 conditions, 528 events. 295/528 cut-off events. For 2918/2918 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2111 event pairs, 26 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 2510. Up to 373 conditions per place. [2023-08-24 13:42:51,449 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 80 selfloop transitions, 26 changer transitions 3/109 dead transitions. [2023-08-24 13:42:51,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 109 transitions, 1091 flow [2023-08-24 13:42:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:42:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:42:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2024 transitions. [2023-08-24 13:42:51,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34562841530054644 [2023-08-24 13:42:51,455 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2024 transitions. [2023-08-24 13:42:51,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2024 transitions. [2023-08-24 13:42:51,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:51,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2024 transitions. [2023-08-24 13:42:51,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.66666666666666) internal successors, (2024), 12 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:51,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:51,468 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:51,468 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 624 flow. Second operand 12 states and 2024 transitions. [2023-08-24 13:42:51,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 109 transitions, 1091 flow [2023-08-24 13:42:51,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 109 transitions, 994 flow, removed 18 selfloop flow, removed 7 redundant places. [2023-08-24 13:42:51,478 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 680 flow [2023-08-24 13:42:51,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=680, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-08-24 13:42:51,479 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2023-08-24 13:42:51,479 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 680 flow [2023-08-24 13:42:51,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:51,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:51,480 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:51,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 13:42:51,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:51,686 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 13:42:51,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1055642266, now seen corresponding path program 4 times [2023-08-24 13:42:51,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:51,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26872014] [2023-08-24 13:42:51,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:51,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:52,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26872014] [2023-08-24 13:42:52,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26872014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:52,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616044278] [2023-08-24 13:42:52,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:42:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:52,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:52,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 13:42:52,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:42:52,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:52,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:42:52,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:52,665 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:52,666 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 27 treesize of output 19 [2023-08-24 13:42:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:52,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:53,401 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:42:53,401 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 50 treesize of output 50 [2023-08-24 13:42:53,429 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:53,429 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 34 treesize of output 1 [2023-08-24 13:42:53,433 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:53,433 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 34 treesize of output 1 [2023-08-24 13:42:53,436 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:53,436 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 34 treesize of output 1 [2023-08-24 13:42:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:53,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616044278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:53,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:42:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659546404] [2023-08-24 13:42:53,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:53,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:42:53,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:42:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:42:53,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:42:53,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 680 flow. Second operand has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:53,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:53,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:42:53,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:54,078 INFO L124 PetriNetUnfolderBase]: 298/540 cut-off events. [2023-08-24 13:42:54,078 INFO L125 PetriNetUnfolderBase]: For 3067/3067 co-relation queries the response was YES. [2023-08-24 13:42:54,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2749 conditions, 540 events. 298/540 cut-off events. For 3067/3067 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2206 event pairs, 41 based on Foata normal form. 1/533 useless extension candidates. Maximal degree in co-relation 2659. Up to 386 conditions per place. [2023-08-24 13:42:54,084 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 79 selfloop transitions, 23 changer transitions 3/105 dead transitions. [2023-08-24 13:42:54,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 105 transitions, 1076 flow [2023-08-24 13:42:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:42:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:42:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1853 transitions. [2023-08-24 13:42:54,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.345193740685544 [2023-08-24 13:42:54,090 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1853 transitions. [2023-08-24 13:42:54,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1853 transitions. [2023-08-24 13:42:54,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:54,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1853 transitions. [2023-08-24 13:42:54,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.45454545454547) internal successors, (1853), 11 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:54,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:54,102 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:54,102 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 680 flow. Second operand 11 states and 1853 transitions. [2023-08-24 13:42:54,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 105 transitions, 1076 flow [2023-08-24 13:42:54,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 105 transitions, 1014 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-08-24 13:42:54,112 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 682 flow [2023-08-24 13:42:54,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=682, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2023-08-24 13:42:54,113 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 71 predicate places. [2023-08-24 13:42:54,113 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 682 flow [2023-08-24 13:42:54,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:54,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:54,114 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:54,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 13:42:54,320 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,SelfDestructingSolverStorable12 [2023-08-24 13:42:54,320 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 13:42:54,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1482572066, now seen corresponding path program 5 times [2023-08-24 13:42:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667398381] [2023-08-24 13:42:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:55,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:55,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667398381] [2023-08-24 13:42:55,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667398381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:55,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541708335] [2023-08-24 13:42:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:42:55,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:55,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:55,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 13:42:55,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:42:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:55,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:42:55,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:55,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:55,370 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 40 treesize of output 24 [2023-08-24 13:42:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:55,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:56,083 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:42:56,084 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 50 treesize of output 50 [2023-08-24 13:42:56,122 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:56,123 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 34 treesize of output 1 [2023-08-24 13:42:56,126 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:56,127 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 34 treesize of output 1 [2023-08-24 13:42:56,138 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:42:56,138 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 34 treesize of output 1 [2023-08-24 13:42:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541708335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:56,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:56,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:42:56,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809368872] [2023-08-24 13:42:56,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:56,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:42:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:42:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:42:56,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:42:56,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 682 flow. Second operand has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:56,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:56,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:42:56,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:57,002 INFO L124 PetriNetUnfolderBase]: 299/545 cut-off events. [2023-08-24 13:42:57,002 INFO L125 PetriNetUnfolderBase]: For 3048/3048 co-relation queries the response was YES. [2023-08-24 13:42:57,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2777 conditions, 545 events. 299/545 cut-off events. For 3048/3048 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2255 event pairs, 33 based on Foata normal form. 1/546 useless extension candidates. Maximal degree in co-relation 2686. Up to 375 conditions per place. [2023-08-24 13:42:57,008 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 80 selfloop transitions, 26 changer transitions 5/111 dead transitions. [2023-08-24 13:42:57,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 1121 flow [2023-08-24 13:42:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:42:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:42:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2187 transitions. [2023-08-24 13:42:57,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447351828499369 [2023-08-24 13:42:57,016 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2187 transitions. [2023-08-24 13:42:57,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2187 transitions. [2023-08-24 13:42:57,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:57,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2187 transitions. [2023-08-24 13:42:57,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.23076923076923) internal successors, (2187), 13 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:57,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:57,031 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:57,031 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 682 flow. Second operand 13 states and 2187 transitions. [2023-08-24 13:42:57,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 1121 flow [2023-08-24 13:42:57,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 111 transitions, 1074 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-08-24 13:42:57,041 INFO L231 Difference]: Finished difference. Result has 98 places, 78 transitions, 707 flow [2023-08-24 13:42:57,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=707, PETRI_PLACES=98, PETRI_TRANSITIONS=78} [2023-08-24 13:42:57,042 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 75 predicate places. [2023-08-24 13:42:57,042 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 78 transitions, 707 flow [2023-08-24 13:42:57,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:57,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:42:57,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:42:57,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 13:42:57,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 13:42:57,250 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 13:42:57,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:42:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash 363027338, now seen corresponding path program 6 times [2023-08-24 13:42:57,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:42:57,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278364285] [2023-08-24 13:42:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:42:57,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:42:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:42:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:58,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:42:58,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278364285] [2023-08-24 13:42:58,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278364285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:42:58,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536146899] [2023-08-24 13:42:58,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:42:58,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:42:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:42:58,041 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:42:58,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 13:42:58,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:42:58,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:42:58,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:42:58,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:42:58,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:58,556 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 27 treesize of output 19 [2023-08-24 13:42:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:58,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:42:59,031 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:42:59,032 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 140 treesize of output 120 [2023-08-24 13:42:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:42:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536146899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:42:59,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:42:59,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:42:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857200099] [2023-08-24 13:42:59,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:42:59,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:42:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:42:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:42:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:42:59,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:42:59,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 78 transitions, 707 flow. Second operand has 23 states, 23 states have (on average 163.95652173913044) internal successors, (3771), 23 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:59,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:42:59,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:42:59,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:00,590 INFO L124 PetriNetUnfolderBase]: 363/668 cut-off events. [2023-08-24 13:43:00,590 INFO L125 PetriNetUnfolderBase]: For 4833/4833 co-relation queries the response was YES. [2023-08-24 13:43:00,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3570 conditions, 668 events. 363/668 cut-off events. For 4833/4833 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2945 event pairs, 112 based on Foata normal form. 8/676 useless extension candidates. Maximal degree in co-relation 3477. Up to 467 conditions per place. [2023-08-24 13:43:00,597 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 87 selfloop transitions, 36 changer transitions 11/134 dead transitions. [2023-08-24 13:43:00,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 134 transitions, 1434 flow [2023-08-24 13:43:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:43:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:43:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2347 transitions. [2023-08-24 13:43:00,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3435304449648712 [2023-08-24 13:43:00,602 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2347 transitions. [2023-08-24 13:43:00,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2347 transitions. [2023-08-24 13:43:00,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:00,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2347 transitions. [2023-08-24 13:43:00,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 167.64285714285714) internal successors, (2347), 14 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:00,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:00,615 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:00,615 INFO L175 Difference]: Start difference. First operand has 98 places, 78 transitions, 707 flow. Second operand 14 states and 2347 transitions. [2023-08-24 13:43:00,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 134 transitions, 1434 flow [2023-08-24 13:43:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 134 transitions, 1349 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-08-24 13:43:00,627 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 1061 flow [2023-08-24 13:43:00,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1061, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2023-08-24 13:43:00,628 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 83 predicate places. [2023-08-24 13:43:00,628 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 1061 flow [2023-08-24 13:43:00,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 163.95652173913044) internal successors, (3771), 23 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:00,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:00,629 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:00,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 13:43:00,836 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 13:43:00,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:00,837 INFO L85 PathProgramCache]: Analyzing trace with hash -90964130, now seen corresponding path program 7 times [2023-08-24 13:43:00,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:00,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886284218] [2023-08-24 13:43:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:00,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:01,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886284218] [2023-08-24 13:43:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886284218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455471154] [2023-08-24 13:43:01,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:43:01,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:01,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:01,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 13:43:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:01,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:43:01,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:01,814 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:01,815 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 27 treesize of output 19 [2023-08-24 13:43:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:01,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:02,456 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:43:02,457 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 58 treesize of output 58 [2023-08-24 13:43:02,493 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-24 13:43:02,493 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 11 [2023-08-24 13:43:02,508 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:02,508 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 58 treesize of output 1 [2023-08-24 13:43:02,521 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:02,521 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 58 treesize of output 1 [2023-08-24 13:43:02,523 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 13:43:02,533 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:02,534 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 58 treesize of output 1 [2023-08-24 13:43:02,570 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455471154] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:02,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:43:02,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999177840] [2023-08-24 13:43:02,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:02,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:43:02,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:43:02,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:43:02,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:43:02,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 1061 flow. Second operand has 23 states, 23 states have (on average 165.1304347826087) internal successors, (3798), 23 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:02,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:02,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:43:02,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:03,235 INFO L124 PetriNetUnfolderBase]: 379/699 cut-off events. [2023-08-24 13:43:03,236 INFO L125 PetriNetUnfolderBase]: For 6758/6758 co-relation queries the response was YES. [2023-08-24 13:43:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 699 events. 379/699 cut-off events. For 6758/6758 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3108 event pairs, 72 based on Foata normal form. 2/701 useless extension candidates. Maximal degree in co-relation 4148. Up to 517 conditions per place. [2023-08-24 13:43:03,243 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 96 selfloop transitions, 30 changer transitions 5/131 dead transitions. [2023-08-24 13:43:03,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 131 transitions, 1579 flow [2023-08-24 13:43:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:43:03,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:43:03,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2019 transitions. [2023-08-24 13:43:03,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447745901639344 [2023-08-24 13:43:03,247 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2019 transitions. [2023-08-24 13:43:03,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2019 transitions. [2023-08-24 13:43:03,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:03,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2019 transitions. [2023-08-24 13:43:03,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.25) internal successors, (2019), 12 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:03,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:03,255 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:03,255 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 1061 flow. Second operand 12 states and 2019 transitions. [2023-08-24 13:43:03,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 131 transitions, 1579 flow [2023-08-24 13:43:03,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 131 transitions, 1426 flow, removed 76 selfloop flow, removed 2 redundant places. [2023-08-24 13:43:03,278 INFO L231 Difference]: Finished difference. Result has 118 places, 108 transitions, 1118 flow [2023-08-24 13:43:03,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1118, PETRI_PLACES=118, PETRI_TRANSITIONS=108} [2023-08-24 13:43:03,278 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 95 predicate places. [2023-08-24 13:43:03,278 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 108 transitions, 1118 flow [2023-08-24 13:43:03,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.1304347826087) internal successors, (3798), 23 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:03,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:03,279 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:03,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:03,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 13:43:03,485 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:03,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash 78933740, now seen corresponding path program 8 times [2023-08-24 13:43:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576817365] [2023-08-24 13:43:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:03,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:04,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:04,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576817365] [2023-08-24 13:43:04,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576817365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:04,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171277795] [2023-08-24 13:43:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:43:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:04,220 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:04,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 13:43:04,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:43:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:04,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:43:04,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:04,544 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:04,544 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 27 treesize of output 19 [2023-08-24 13:43:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:04,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:05,123 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:43:05,123 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 58 treesize of output 58 [2023-08-24 13:43:05,167 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-24 13:43:05,167 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 11 [2023-08-24 13:43:05,177 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:05,177 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 58 treesize of output 1 [2023-08-24 13:43:05,185 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:05,185 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 58 treesize of output 1 [2023-08-24 13:43:05,187 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 13:43:05,194 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:05,194 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 58 treesize of output 1 [2023-08-24 13:43:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:05,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171277795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:05,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:05,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:43:05,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104862376] [2023-08-24 13:43:05,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:05,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:43:05,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:05,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:43:05,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:43:05,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:43:05,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 108 transitions, 1118 flow. Second operand has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:05,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:05,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:43:05,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:05,941 INFO L124 PetriNetUnfolderBase]: 401/738 cut-off events. [2023-08-24 13:43:05,942 INFO L125 PetriNetUnfolderBase]: For 7071/7071 co-relation queries the response was YES. [2023-08-24 13:43:05,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 738 events. 401/738 cut-off events. For 7071/7071 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3345 event pairs, 76 based on Foata normal form. 1/737 useless extension candidates. Maximal degree in co-relation 4300. Up to 555 conditions per place. [2023-08-24 13:43:05,950 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 103 selfloop transitions, 33 changer transitions 2/138 dead transitions. [2023-08-24 13:43:05,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 138 transitions, 1652 flow [2023-08-24 13:43:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:43:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:43:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2183 transitions. [2023-08-24 13:43:05,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441046658259773 [2023-08-24 13:43:05,954 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2183 transitions. [2023-08-24 13:43:05,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2183 transitions. [2023-08-24 13:43:05,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:05,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2183 transitions. [2023-08-24 13:43:05,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 167.92307692307693) internal successors, (2183), 13 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:05,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:05,962 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:05,963 INFO L175 Difference]: Start difference. First operand has 118 places, 108 transitions, 1118 flow. Second operand 13 states and 2183 transitions. [2023-08-24 13:43:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 138 transitions, 1652 flow [2023-08-24 13:43:05,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 138 transitions, 1596 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-24 13:43:05,984 INFO L231 Difference]: Finished difference. Result has 126 places, 116 transitions, 1270 flow [2023-08-24 13:43:05,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1270, PETRI_PLACES=126, PETRI_TRANSITIONS=116} [2023-08-24 13:43:05,985 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 103 predicate places. [2023-08-24 13:43:05,985 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 116 transitions, 1270 flow [2023-08-24 13:43:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:05,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:05,986 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:05,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:06,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 13:43:06,193 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:06,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1786573818, now seen corresponding path program 9 times [2023-08-24 13:43:06,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:06,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110822656] [2023-08-24 13:43:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:06,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:06,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110822656] [2023-08-24 13:43:06,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110822656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:06,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834872997] [2023-08-24 13:43:06,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:43:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:06,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:06,845 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:06,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 13:43:07,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:43:07,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:07,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:43:07,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:07,107 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:07,108 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 40 treesize of output 24 [2023-08-24 13:43:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:07,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:07,689 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:43:07,690 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 58 treesize of output 58 [2023-08-24 13:43:07,730 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-24 13:43:07,731 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 11 [2023-08-24 13:43:07,745 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:07,745 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 58 treesize of output 1 [2023-08-24 13:43:07,751 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:07,751 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 58 treesize of output 1 [2023-08-24 13:43:07,753 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 13:43:07,761 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:07,761 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 58 treesize of output 1 [2023-08-24 13:43:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:07,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834872997] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:07,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:07,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:43:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773320781] [2023-08-24 13:43:07,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:07,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:43:07,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:43:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:43:07,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:43:07,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 116 transitions, 1270 flow. Second operand has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:07,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:07,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:43:07,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:08,459 INFO L124 PetriNetUnfolderBase]: 407/753 cut-off events. [2023-08-24 13:43:08,459 INFO L125 PetriNetUnfolderBase]: For 7348/7348 co-relation queries the response was YES. [2023-08-24 13:43:08,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 753 events. 407/753 cut-off events. For 7348/7348 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3464 event pairs, 79 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 4450. Up to 555 conditions per place. [2023-08-24 13:43:08,466 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 103 selfloop transitions, 35 changer transitions 4/142 dead transitions. [2023-08-24 13:43:08,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 142 transitions, 1730 flow [2023-08-24 13:43:08,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:43:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:43:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2184 transitions. [2023-08-24 13:43:08,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3442622950819672 [2023-08-24 13:43:08,470 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2184 transitions. [2023-08-24 13:43:08,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2184 transitions. [2023-08-24 13:43:08,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:08,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2184 transitions. [2023-08-24 13:43:08,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.0) internal successors, (2184), 13 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:08,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:08,478 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:08,478 INFO L175 Difference]: Start difference. First operand has 126 places, 116 transitions, 1270 flow. Second operand 13 states and 2184 transitions. [2023-08-24 13:43:08,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 142 transitions, 1730 flow [2023-08-24 13:43:08,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 142 transitions, 1612 flow, removed 36 selfloop flow, removed 8 redundant places. [2023-08-24 13:43:08,501 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1300 flow [2023-08-24 13:43:08,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1300, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2023-08-24 13:43:08,502 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 109 predicate places. [2023-08-24 13:43:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1300 flow [2023-08-24 13:43:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:08,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:08,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 13:43:08,717 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:08,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1339643460, now seen corresponding path program 10 times [2023-08-24 13:43:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527617677] [2023-08-24 13:43:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:09,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:09,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527617677] [2023-08-24 13:43:09,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527617677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:09,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718111562] [2023-08-24 13:43:09,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:43:09,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:09,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:09,500 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:09,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 13:43:09,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:43:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:09,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 13:43:09,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:09,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:43:09,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:43:09,893 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:09,893 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 40 treesize of output 24 [2023-08-24 13:43:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:09,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:10,577 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse0) (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse4 (select .cse7 ~o_2~0.base))) (let ((.cse6 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset)) (.cse5 (select .cse4 c_~o_2~0.offset))) (or (< (select .cse4 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse5 .cse6) (< .cse6 .cse5)))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (= (select (select .cse8 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))))) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse10 (select .cse11 ~o_2~0.base))) (let ((.cse9 (select .cse10 .cse3))) (or (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse9) (< (select .cse10 c_~o_2~0.offset) (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset)) (= .cse9 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1080 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1080))) (let ((.cse14 (select .cse15 ~o_2~0.base))) (let ((.cse13 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (.cse12 (select .cse14 c_~o_2~0.offset))) (or (< .cse12 .cse13) (= (select .cse14 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< .cse13 .cse12)))))))) is different from false [2023-08-24 13:43:10,663 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-24 13:43:10,664 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 156 treesize of output 145 [2023-08-24 13:43:10,689 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:10,690 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 84 [2023-08-24 13:43:11,121 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:11,124 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:11,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:11,128 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:11,131 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:11,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:11,134 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:11,138 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:11,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718111562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:11,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 13:43:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770064600] [2023-08-24 13:43:11,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:11,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 13:43:11,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:11,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 13:43:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=706, Unknown=1, NotChecked=54, Total=870 [2023-08-24 13:43:11,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 488 [2023-08-24 13:43:11,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 1300 flow. Second operand has 30 states, 30 states have (on average 160.83333333333334) internal successors, (4825), 30 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:11,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:11,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 488 [2023-08-24 13:43:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:12,196 INFO L124 PetriNetUnfolderBase]: 487/895 cut-off events. [2023-08-24 13:43:12,197 INFO L125 PetriNetUnfolderBase]: For 9653/9653 co-relation queries the response was YES. [2023-08-24 13:43:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5529 conditions, 895 events. 487/895 cut-off events. For 9653/9653 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4316 event pairs, 67 based on Foata normal form. 1/894 useless extension candidates. Maximal degree in co-relation 5424. Up to 414 conditions per place. [2023-08-24 13:43:12,208 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 111 selfloop transitions, 55 changer transitions 5/171 dead transitions. [2023-08-24 13:43:12,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 171 transitions, 2062 flow [2023-08-24 13:43:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:43:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:43:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2144 transitions. [2023-08-24 13:43:12,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3379571248423707 [2023-08-24 13:43:12,211 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2144 transitions. [2023-08-24 13:43:12,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2144 transitions. [2023-08-24 13:43:12,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:12,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2144 transitions. [2023-08-24 13:43:12,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.92307692307693) internal successors, (2144), 13 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:12,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:12,219 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:12,219 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1300 flow. Second operand 13 states and 2144 transitions. [2023-08-24 13:43:12,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 171 transitions, 2062 flow [2023-08-24 13:43:12,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 171 transitions, 1951 flow, removed 24 selfloop flow, removed 10 redundant places. [2023-08-24 13:43:12,252 INFO L231 Difference]: Finished difference. Result has 138 places, 128 transitions, 1473 flow [2023-08-24 13:43:12,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1473, PETRI_PLACES=138, PETRI_TRANSITIONS=128} [2023-08-24 13:43:12,252 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 115 predicate places. [2023-08-24 13:43:12,252 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 128 transitions, 1473 flow [2023-08-24 13:43:12,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.83333333333334) internal successors, (4825), 30 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:12,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:12,253 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:12,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:12,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:12,460 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:12,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:12,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1408646354, now seen corresponding path program 11 times [2023-08-24 13:43:12,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:12,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649033279] [2023-08-24 13:43:12,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:12,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:13,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649033279] [2023-08-24 13:43:13,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649033279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046102601] [2023-08-24 13:43:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:43:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:13,221 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:13,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 13:43:13,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:43:13,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:13,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 13:43:13,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:43:13,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:43:13,662 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:13,662 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 40 treesize of output 24 [2023-08-24 13:43:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:13,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:14,320 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1151 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1151))) (let ((.cse2 (select .cse4 ~o_2~0.base))) (let ((.cse1 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse0 (select .cse2 c_~o_2~0.offset))) (or (< .cse0 .cse1) (= .cse1 .cse0) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse2 .cse3))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1151 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1151))) (= (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse5 ~o_2~0.base) c_~o_2~0.offset))))) (forall ((v_ArrVal_1151 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1151))) (let ((.cse8 (select .cse7 ~o_2~0.base))) (let ((.cse6 (select .cse8 .cse3))) (or (< .cse6 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset) (select .cse8 c_~o_2~0.offset)) (= .cse6 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1151 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1151))) (let ((.cse9 (select .cse10 ~o_2~0.base))) (let ((.cse11 (select .cse9 .cse3))) (or (< (select .cse9 c_~o_2~0.offset) (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset)) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse11) (= .cse11 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1151 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1151))) (let ((.cse14 (select .cse15 ~o_2~0.base))) (let ((.cse12 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (.cse13 (select .cse14 c_~o_2~0.offset))) (or (= .cse12 .cse13) (< (select .cse14 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< .cse12 .cse13)))))))) is different from false [2023-08-24 13:43:14,358 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:14,358 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 156 treesize of output 160 [2023-08-24 13:43:14,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:14,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 84 [2023-08-24 13:43:14,823 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:14,826 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:14,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:14,838 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:14,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:14,842 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:14,846 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:14,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:14,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046102601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:14,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:14,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 13:43:14,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430973696] [2023-08-24 13:43:14,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:14,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 13:43:14,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 13:43:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=705, Unknown=1, NotChecked=54, Total=870 [2023-08-24 13:43:14,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 488 [2023-08-24 13:43:14,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 128 transitions, 1473 flow. Second operand has 30 states, 30 states have (on average 160.83333333333334) internal successors, (4825), 30 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:14,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:14,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 488 [2023-08-24 13:43:14,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:18,046 INFO L124 PetriNetUnfolderBase]: 529/969 cut-off events. [2023-08-24 13:43:18,046 INFO L125 PetriNetUnfolderBase]: For 13039/13039 co-relation queries the response was YES. [2023-08-24 13:43:18,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6361 conditions, 969 events. 529/969 cut-off events. For 13039/13039 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4783 event pairs, 123 based on Foata normal form. 1/968 useless extension candidates. Maximal degree in co-relation 6251. Up to 724 conditions per place. [2023-08-24 13:43:18,059 INFO L140 encePairwiseOnDemand]: 474/488 looper letters, 120 selfloop transitions, 55 changer transitions 3/178 dead transitions. [2023-08-24 13:43:18,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 178 transitions, 2305 flow [2023-08-24 13:43:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:43:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:43:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2299 transitions. [2023-08-24 13:43:18,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33650468384074944 [2023-08-24 13:43:18,063 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2299 transitions. [2023-08-24 13:43:18,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2299 transitions. [2023-08-24 13:43:18,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:18,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2299 transitions. [2023-08-24 13:43:18,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.21428571428572) internal successors, (2299), 14 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:18,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:18,071 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:18,071 INFO L175 Difference]: Start difference. First operand has 138 places, 128 transitions, 1473 flow. Second operand 14 states and 2299 transitions. [2023-08-24 13:43:18,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 178 transitions, 2305 flow [2023-08-24 13:43:18,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 178 transitions, 2212 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-08-24 13:43:18,104 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1849 flow [2023-08-24 13:43:18,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1849, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2023-08-24 13:43:18,105 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 128 predicate places. [2023-08-24 13:43:18,105 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1849 flow [2023-08-24 13:43:18,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.83333333333334) internal successors, (4825), 30 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:18,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:18,106 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:18,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 13:43:18,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:18,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:18,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash 600916800, now seen corresponding path program 12 times [2023-08-24 13:43:18,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:18,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132210908] [2023-08-24 13:43:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:18,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132210908] [2023-08-24 13:43:19,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132210908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:19,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128249054] [2023-08-24 13:43:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:43:19,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:19,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:19,078 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:19,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 13:43:19,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:43:19,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:19,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 13:43:19,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:43:19,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:43:19,492 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:19,492 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 27 treesize of output 19 [2023-08-24 13:43:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:19,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:20,188 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1222 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1222))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse0) (= .cse0 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) (forall ((v_ArrVal_1222 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1222))) (let ((.cse6 (select .cse5 ~o_2~0.base))) (let ((.cse4 (select .cse6 .cse3))) (or (< .cse4 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse4 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< (select (select .cse5 c_~o_0~0.base) c_~o_0~0.offset) (select .cse6 c_~o_2~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1222 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1222))) (= (select (select .cse7 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset))))) (forall ((v_ArrVal_1222 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1222))) (let ((.cse10 (select .cse11 ~o_2~0.base))) (let ((.cse8 (select .cse10 c_~o_2~0.offset)) (.cse9 (select (select .cse11 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse8 .cse9) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse10 .cse3)) (< .cse8 .cse9)))))) (forall ((v_ArrVal_1222 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1222))) (let ((.cse14 (select .cse15 ~o_2~0.base))) (let ((.cse13 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset)) (.cse12 (select .cse14 c_~o_2~0.offset))) (or (= .cse12 .cse13) (< (select .cse14 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< .cse13 .cse12)))))))) is different from false [2023-08-24 13:43:20,250 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-24 13:43:20,251 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 176 treesize of output 173 [2023-08-24 13:43:20,279 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:20,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 118 [2023-08-24 13:43:20,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:20,616 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:20,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:20,618 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:20,621 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:20,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:20,623 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:20,626 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:20,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128249054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:20,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:20,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-24 13:43:20,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316952570] [2023-08-24 13:43:20,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:20,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:43:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:43:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=809, Unknown=1, NotChecked=58, Total=992 [2023-08-24 13:43:20,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 488 [2023-08-24 13:43:20,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1849 flow. Second operand has 32 states, 32 states have (on average 160.8125) internal successors, (5146), 32 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:20,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:20,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 488 [2023-08-24 13:43:20,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:27,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 13:43:30,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 13:43:31,906 INFO L124 PetriNetUnfolderBase]: 554/1020 cut-off events. [2023-08-24 13:43:31,906 INFO L125 PetriNetUnfolderBase]: For 14786/14786 co-relation queries the response was YES. [2023-08-24 13:43:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7137 conditions, 1020 events. 554/1020 cut-off events. For 14786/14786 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5145 event pairs, 143 based on Foata normal form. 2/1020 useless extension candidates. Maximal degree in co-relation 7021. Up to 787 conditions per place. [2023-08-24 13:43:31,920 INFO L140 encePairwiseOnDemand]: 475/488 looper letters, 125 selfloop transitions, 51 changer transitions 5/181 dead transitions. [2023-08-24 13:43:31,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 181 transitions, 2527 flow [2023-08-24 13:43:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:43:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:43:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2297 transitions. [2023-08-24 13:43:31,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.336211943793911 [2023-08-24 13:43:31,924 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2297 transitions. [2023-08-24 13:43:31,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2297 transitions. [2023-08-24 13:43:31,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:31,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2297 transitions. [2023-08-24 13:43:31,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.07142857142858) internal successors, (2297), 14 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:31,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:31,932 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:31,932 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1849 flow. Second operand 14 states and 2297 transitions. [2023-08-24 13:43:31,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 181 transitions, 2527 flow [2023-08-24 13:43:31,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 181 transitions, 2392 flow, removed 49 selfloop flow, removed 7 redundant places. [2023-08-24 13:43:31,978 INFO L231 Difference]: Finished difference. Result has 160 places, 154 transitions, 1945 flow [2023-08-24 13:43:31,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1945, PETRI_PLACES=160, PETRI_TRANSITIONS=154} [2023-08-24 13:43:31,979 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 137 predicate places. [2023-08-24 13:43:31,979 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 154 transitions, 1945 flow [2023-08-24 13:43:31,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 160.8125) internal successors, (5146), 32 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:31,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:31,980 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:31,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:32,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:32,186 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:32,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:32,187 INFO L85 PathProgramCache]: Analyzing trace with hash -446071572, now seen corresponding path program 13 times [2023-08-24 13:43:32,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:32,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109086723] [2023-08-24 13:43:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:33,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:33,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109086723] [2023-08-24 13:43:33,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109086723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:33,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314427893] [2023-08-24 13:43:33,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:43:33,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:33,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:33,071 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:33,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 13:43:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:33,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-24 13:43:33,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:43:33,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:43:33,487 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:33,487 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 40 treesize of output 24 [2023-08-24 13:43:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:33,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:34,205 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset))) (and (forall ((v_ArrVal_1293 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1293))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (let ((.cse2 (select .cse0 .cse3))) (or (< (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset)) (= .cse2 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse2)))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_1293 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1293))) (= (select (select .cse4 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset))))) (forall ((v_ArrVal_1293 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1293))) (let ((.cse7 (select .cse8 ~o_2~0.base))) (let ((.cse6 (select .cse7 c_~o_2~0.offset)) (.cse5 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse5 .cse6) (< (select .cse7 .cse3) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse6 .cse5)))))) (forall ((v_ArrVal_1293 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1293))) (let ((.cse10 (select .cse9 ~o_2~0.base))) (let ((.cse11 (select .cse10 .cse3))) (or (< (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) (select .cse10 c_~o_2~0.offset)) (< .cse11 |c_thread1Thread1of1ForFork1_#t~mem1#1|) (= .cse11 |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) (forall ((v_ArrVal_1293 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1293))) (let ((.cse14 (select .cse15 ~o_2~0.base))) (let ((.cse12 (select .cse14 c_~o_2~0.offset)) (.cse13 (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse12 .cse13) (= .cse12 .cse13) (< |c_thread1Thread1of1ForFork1_#t~mem1#1| (select .cse14 .cse3))))))))) is different from false [2023-08-24 13:43:34,267 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-24 13:43:34,268 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 176 treesize of output 173 [2023-08-24 13:43:34,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:34,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 118 [2023-08-24 13:43:34,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:34,602 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:34,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:34,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:34,607 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:34,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:34,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 13:43:34,611 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:43:34,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 1 [2023-08-24 13:43:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:34,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314427893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:34,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:34,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 13:43:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135047885] [2023-08-24 13:43:34,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:34,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 13:43:34,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:34,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 13:43:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=762, Unknown=1, NotChecked=56, Total=930 [2023-08-24 13:43:34,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 488 [2023-08-24 13:43:34,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 154 transitions, 1945 flow. Second operand has 31 states, 31 states have (on average 160.80645161290323) internal successors, (4985), 31 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:34,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:34,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 488 [2023-08-24 13:43:34,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:35,724 INFO L124 PetriNetUnfolderBase]: 560/1035 cut-off events. [2023-08-24 13:43:35,724 INFO L125 PetriNetUnfolderBase]: For 15170/15170 co-relation queries the response was YES. [2023-08-24 13:43:35,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7292 conditions, 1035 events. 560/1035 cut-off events. For 15170/15170 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5268 event pairs, 136 based on Foata normal form. 1/1034 useless extension candidates. Maximal degree in co-relation 7174. Up to 770 conditions per place. [2023-08-24 13:43:35,735 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 132 selfloop transitions, 47 changer transitions 5/184 dead transitions. [2023-08-24 13:43:35,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 184 transitions, 2585 flow [2023-08-24 13:43:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:43:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:43:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2293 transitions. [2023-08-24 13:43:35,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3356264637002342 [2023-08-24 13:43:35,737 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2293 transitions. [2023-08-24 13:43:35,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2293 transitions. [2023-08-24 13:43:35,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:35,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2293 transitions. [2023-08-24 13:43:35,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 163.78571428571428) internal successors, (2293), 14 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:35,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:35,744 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:35,744 INFO L175 Difference]: Start difference. First operand has 160 places, 154 transitions, 1945 flow. Second operand 14 states and 2293 transitions. [2023-08-24 13:43:35,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 184 transitions, 2585 flow [2023-08-24 13:43:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 184 transitions, 2468 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-24 13:43:35,781 INFO L231 Difference]: Finished difference. Result has 166 places, 154 transitions, 1965 flow [2023-08-24 13:43:35,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1965, PETRI_PLACES=166, PETRI_TRANSITIONS=154} [2023-08-24 13:43:35,782 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 143 predicate places. [2023-08-24 13:43:35,782 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 154 transitions, 1965 flow [2023-08-24 13:43:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 160.80645161290323) internal successors, (4985), 31 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:35,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:35,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:35,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:35,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:35,986 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:35,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1042189840, now seen corresponding path program 14 times [2023-08-24 13:43:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:35,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446944127] [2023-08-24 13:43:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:43:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446944127] [2023-08-24 13:43:37,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446944127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970284624] [2023-08-24 13:43:37,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:43:37,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:37,149 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:37,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 13:43:37,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:43:37,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:37,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:43:37,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:37,507 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:37,507 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 27 treesize of output 19 [2023-08-24 13:43:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:37,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:37,990 INFO L322 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2023-08-24 13:43:37,990 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 165 treesize of output 99 [2023-08-24 13:43:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:38,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970284624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:38,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:38,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 31 [2023-08-24 13:43:38,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535927575] [2023-08-24 13:43:38,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:43:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:43:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2023-08-24 13:43:38,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 488 [2023-08-24 13:43:38,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 154 transitions, 1965 flow. Second operand has 32 states, 32 states have (on average 136.875) internal successors, (4380), 32 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:38,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:38,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 488 [2023-08-24 13:43:38,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:40,269 INFO L124 PetriNetUnfolderBase]: 1201/2213 cut-off events. [2023-08-24 13:43:40,269 INFO L125 PetriNetUnfolderBase]: For 35216/35216 co-relation queries the response was YES. [2023-08-24 13:43:40,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16166 conditions, 2213 events. 1201/2213 cut-off events. For 35216/35216 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13431 event pairs, 404 based on Foata normal form. 4/2213 useless extension candidates. Maximal degree in co-relation 16036. Up to 881 conditions per place. [2023-08-24 13:43:40,287 INFO L140 encePairwiseOnDemand]: 474/488 looper letters, 275 selfloop transitions, 104 changer transitions 10/389 dead transitions. [2023-08-24 13:43:40,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 389 transitions, 5757 flow [2023-08-24 13:43:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 13:43:40,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 13:43:40,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4054 transitions. [2023-08-24 13:43:40,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2864612775579423 [2023-08-24 13:43:40,292 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4054 transitions. [2023-08-24 13:43:40,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4054 transitions. [2023-08-24 13:43:40,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:40,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4054 transitions. [2023-08-24 13:43:40,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 139.79310344827587) internal successors, (4054), 29 states have internal predecessors, (4054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:40,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 488.0) internal successors, (14640), 30 states have internal predecessors, (14640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:40,308 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 488.0) internal successors, (14640), 30 states have internal predecessors, (14640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:40,308 INFO L175 Difference]: Start difference. First operand has 166 places, 154 transitions, 1965 flow. Second operand 29 states and 4054 transitions. [2023-08-24 13:43:40,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 389 transitions, 5757 flow [2023-08-24 13:43:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 389 transitions, 5505 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-24 13:43:40,409 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 3216 flow [2023-08-24 13:43:40,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=1851, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3216, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2023-08-24 13:43:40,410 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 168 predicate places. [2023-08-24 13:43:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 3216 flow [2023-08-24 13:43:40,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 136.875) internal successors, (4380), 32 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:40,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:40,411 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:40,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:40,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:40,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:40,619 INFO L85 PathProgramCache]: Analyzing trace with hash 133597404, now seen corresponding path program 15 times [2023-08-24 13:43:40,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143352907] [2023-08-24 13:43:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:41,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143352907] [2023-08-24 13:43:41,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143352907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:41,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282476940] [2023-08-24 13:43:41,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:43:41,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:41,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:41,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:41,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 13:43:41,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:43:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:41,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:43:41,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:41,517 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:41,517 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 40 treesize of output 24 [2023-08-24 13:43:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:41,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:41,948 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:43:41,948 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 110 treesize of output 71 [2023-08-24 13:43:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:41,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282476940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:41,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:41,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:43:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019105172] [2023-08-24 13:43:41,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:41,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:43:41,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:43:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:43:41,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:43:41,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 3216 flow. Second operand has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:41,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:41,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:43:41,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:42,911 INFO L124 PetriNetUnfolderBase]: 1375/2523 cut-off events. [2023-08-24 13:43:42,911 INFO L125 PetriNetUnfolderBase]: For 53979/53979 co-relation queries the response was YES. [2023-08-24 13:43:42,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20166 conditions, 2523 events. 1375/2523 cut-off events. For 53979/53979 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 15752 event pairs, 206 based on Foata normal form. 2/2521 useless extension candidates. Maximal degree in co-relation 20013. Up to 1234 conditions per place. [2023-08-24 13:43:42,945 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 165 selfloop transitions, 107 changer transitions 2/274 dead transitions. [2023-08-24 13:43:42,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 274 transitions, 4616 flow [2023-08-24 13:43:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:43:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:43:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2022 transitions. [2023-08-24 13:43:42,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3452868852459016 [2023-08-24 13:43:42,948 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2022 transitions. [2023-08-24 13:43:42,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2022 transitions. [2023-08-24 13:43:42,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:42,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2022 transitions. [2023-08-24 13:43:42,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.5) internal successors, (2022), 12 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:42,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:42,955 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:42,955 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 3216 flow. Second operand 12 states and 2022 transitions. [2023-08-24 13:43:42,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 274 transitions, 4616 flow [2023-08-24 13:43:43,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 274 transitions, 4435 flow, removed 70 selfloop flow, removed 10 redundant places. [2023-08-24 13:43:43,129 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 3740 flow [2023-08-24 13:43:43,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3740, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2023-08-24 13:43:43,129 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 174 predicate places. [2023-08-24 13:43:43,129 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 3740 flow [2023-08-24 13:43:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 165.13636363636363) internal successors, (3633), 22 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:43,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:43,130 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:43,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:43,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:43,337 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:43,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:43,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1958030108, now seen corresponding path program 16 times [2023-08-24 13:43:43,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:43,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563786452] [2023-08-24 13:43:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:43,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:43,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:43,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563786452] [2023-08-24 13:43:43,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563786452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:43,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952799942] [2023-08-24 13:43:43,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:43:43,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:43,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:43,945 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:43,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 13:43:44,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:43:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:44,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:43:44,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:44,269 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:44,269 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 27 treesize of output 19 [2023-08-24 13:43:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:44,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:43:44,755 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:43:44,756 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 58 treesize of output 58 [2023-08-24 13:43:44,799 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-24 13:43:44,799 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 11 [2023-08-24 13:43:44,807 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:44,807 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 58 treesize of output 1 [2023-08-24 13:43:44,813 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:44,814 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 58 treesize of output 1 [2023-08-24 13:43:44,816 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 13:43:44,822 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:43:44,823 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 58 treesize of output 1 [2023-08-24 13:43:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952799942] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:43:44,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:43:44,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:43:44,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733079497] [2023-08-24 13:43:44,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:43:44,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:43:44,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:44,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:43:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:43:44,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:43:44,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 3740 flow. Second operand has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:44,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:44,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:43:44,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:45,928 INFO L124 PetriNetUnfolderBase]: 1419/2601 cut-off events. [2023-08-24 13:43:45,928 INFO L125 PetriNetUnfolderBase]: For 61271/61271 co-relation queries the response was YES. [2023-08-24 13:43:45,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21818 conditions, 2601 events. 1419/2601 cut-off events. For 61271/61271 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16277 event pairs, 494 based on Foata normal form. 2/2603 useless extension candidates. Maximal degree in co-relation 21673. Up to 2224 conditions per place. [2023-08-24 13:43:45,952 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 190 selfloop transitions, 79 changer transitions 4/273 dead transitions. [2023-08-24 13:43:45,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 273 transitions, 4782 flow [2023-08-24 13:43:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:43:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:43:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2017 transitions. [2023-08-24 13:43:45,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444330601092896 [2023-08-24 13:43:45,966 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2017 transitions. [2023-08-24 13:43:45,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2017 transitions. [2023-08-24 13:43:45,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:43:45,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2017 transitions. [2023-08-24 13:43:45,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.08333333333334) internal successors, (2017), 12 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:45,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:45,973 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:45,974 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 3740 flow. Second operand 12 states and 2017 transitions. [2023-08-24 13:43:45,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 273 transitions, 4782 flow [2023-08-24 13:43:46,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 273 transitions, 4656 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-08-24 13:43:46,157 INFO L231 Difference]: Finished difference. Result has 207 places, 247 transitions, 4108 flow [2023-08-24 13:43:46,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4108, PETRI_PLACES=207, PETRI_TRANSITIONS=247} [2023-08-24 13:43:46,157 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 184 predicate places. [2023-08-24 13:43:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 247 transitions, 4108 flow [2023-08-24 13:43:46,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 165.08695652173913) internal successors, (3797), 23 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:46,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:46,158 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:46,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 13:43:46,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 13:43:46,365 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:43:46,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash -590293206, now seen corresponding path program 17 times [2023-08-24 13:43:46,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:46,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316483737] [2023-08-24 13:43:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:46,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:46,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316483737] [2023-08-24 13:43:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316483737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494216580] [2023-08-24 13:43:46,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:43:46,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:46,961 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:43:46,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 13:43:47,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:43:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:47,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:43:47,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:47,256 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:43:47,256 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 27 treesize of output 23 [2023-08-24 13:43:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:43:47,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:27,799 WARN L234 SmtUtils]: Spent 40.11s on a formula simplification. DAG size of input: 44 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 13:44:27,842 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:44:27,842 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 58 treesize of output 58 [2023-08-24 13:44:27,877 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-24 13:44:27,877 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 11 [2023-08-24 13:44:27,892 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:44:27,892 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 58 treesize of output 1 [2023-08-24 13:44:27,899 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:44:27,899 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 58 treesize of output 1 [2023-08-24 13:44:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:27,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494216580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:27,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:27,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-08-24 13:44:27,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444667682] [2023-08-24 13:44:27,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:27,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 13:44:27,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 13:44:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-08-24 13:44:27,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 488 [2023-08-24 13:44:27,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 247 transitions, 4108 flow. Second operand has 27 states, 27 states have (on average 165.14814814814815) internal successors, (4459), 27 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:27,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:27,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 488 [2023-08-24 13:44:27,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:29,072 INFO L124 PetriNetUnfolderBase]: 1425/2625 cut-off events. [2023-08-24 13:44:29,073 INFO L125 PetriNetUnfolderBase]: For 63992/63992 co-relation queries the response was YES. [2023-08-24 13:44:29,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22327 conditions, 2625 events. 1425/2625 cut-off events. For 63992/63992 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16549 event pairs, 496 based on Foata normal form. 2/2627 useless extension candidates. Maximal degree in co-relation 22179. Up to 2238 conditions per place. [2023-08-24 13:44:29,111 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 200 selfloop transitions, 78 changer transitions 4/282 dead transitions. [2023-08-24 13:44:29,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 282 transitions, 5070 flow [2023-08-24 13:44:29,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:44:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:44:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2183 transitions. [2023-08-24 13:44:29,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441046658259773 [2023-08-24 13:44:29,114 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2183 transitions. [2023-08-24 13:44:29,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2183 transitions. [2023-08-24 13:44:29,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:29,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2183 transitions. [2023-08-24 13:44:29,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 167.92307692307693) internal successors, (2183), 13 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:29,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:29,122 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:29,122 INFO L175 Difference]: Start difference. First operand has 207 places, 247 transitions, 4108 flow. Second operand 13 states and 2183 transitions. [2023-08-24 13:44:29,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 282 transitions, 5070 flow [2023-08-24 13:44:29,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 282 transitions, 4856 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-08-24 13:44:29,309 INFO L231 Difference]: Finished difference. Result has 217 places, 254 transitions, 4266 flow [2023-08-24 13:44:29,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4266, PETRI_PLACES=217, PETRI_TRANSITIONS=254} [2023-08-24 13:44:29,310 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 194 predicate places. [2023-08-24 13:44:29,310 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 254 transitions, 4266 flow [2023-08-24 13:44:29,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 165.14814814814815) internal successors, (4459), 27 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:29,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:29,310 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:29,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 13:44:29,511 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:29,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash 466645476, now seen corresponding path program 18 times [2023-08-24 13:44:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:29,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207640427] [2023-08-24 13:44:29,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:29,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:30,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207640427] [2023-08-24 13:44:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207640427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530707463] [2023-08-24 13:44:30,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:44:30,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:30,219 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:30,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 13:44:30,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:44:30,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:30,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 13:44:30,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:44:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:44:30,697 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:44:30,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 13:44:30,797 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:30,797 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 27 treesize of output 19 [2023-08-24 13:44:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:30,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:31,185 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (= (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset))))) (.cse5 (< c_~result_5~0 0)) (.cse4 (< 0 c_~result_5~0))) (and (or (and (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (let ((.cse1 (select (select .cse2 c_~o_2~0.base) c_~o_2~0.offset)) (.cse0 (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse0 .cse1) (< .cse1 .cse0))))) (or .cse3 .cse4)) .cse5) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 5) .cse3) (or (= c_~result_5~0 0) (and (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (let ((.cse7 (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset)) (.cse6 (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse6 .cse7) (< .cse7 .cse6))))) (or (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (< (select (select .cse9 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse9 c_~o_2~0.base) c_~o_2~0.offset)))) .cse4) (or (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (< (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset)))) .cse5))) (or (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (let ((.cse11 (select (select .cse13 c_~o_0~0.base) c_~o_0~0.offset)) (.cse12 (select (select .cse13 c_~o_2~0.base) c_~o_2~0.offset))) (or (= .cse11 .cse12) (< .cse11 .cse12))))) .cse4))) is different from false [2023-08-24 13:44:31,256 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse11 (select (select |c_#memory_int| c_~o_2~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)))) (let ((.cse9 (< |c_thread1Thread1of1ForFork1_#t~mem1#1| .cse11)) (.cse1 (< .cse11 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (.cse0 (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (= (select (select .cse15 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse15 c_~o_2~0.base) c_~o_2~0.offset)))))) (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) .cse0) (or .cse1 (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (let ((.cse2 (select (select .cse4 c_~o_0~0.base) c_~o_0~0.offset)) (.cse3 (select (select .cse4 c_~o_2~0.base) c_~o_2~0.offset))) (or (= .cse2 .cse3) (< .cse2 .cse3)))))) (or (and (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (let ((.cse6 (select (select .cse7 c_~o_2~0.base) c_~o_2~0.offset)) (.cse5 (select (select .cse7 c_~o_0~0.base) c_~o_0~0.offset))) (or (< .cse5 .cse6) (< .cse6 .cse5))))) (or .cse1 (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (< (select (select .cse8 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse8 c_~o_2~0.base) c_~o_2~0.offset))))) (or .cse9 (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (< (select (select .cse10 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse10 c_~o_0~0.base) c_~o_0~0.offset)))))) (= .cse11 |c_thread1Thread1of1ForFork1_#t~mem1#1|)) (or .cse9 (and (or .cse1 .cse0) (forall ((v_ArrVal_1644 (Array Int Int))) (let ((.cse14 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1644))) (let ((.cse13 (select (select .cse14 c_~o_2~0.base) c_~o_2~0.offset)) (.cse12 (select (select .cse14 c_~o_0~0.base) c_~o_0~0.offset))) (or (= .cse12 .cse13) (< .cse13 .cse12)))))))))) is different from false [2023-08-24 13:44:31,334 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-24 13:44:31,335 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 150 treesize of output 155 [2023-08-24 13:44:31,354 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:31,354 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 91 [2023-08-24 13:44:31,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:44:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:44:31,473 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2023-08-24 13:44:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:44:31,481 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2023-08-24 13:44:31,504 INFO L322 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-08-24 13:44:31,505 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 322 treesize of output 1 [2023-08-24 13:44:31,525 INFO L322 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-08-24 13:44:31,526 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 237 treesize of output 1 [2023-08-24 13:44:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:31,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530707463] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:31,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:31,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-24 13:44:31,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103295042] [2023-08-24 13:44:31,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:31,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 13:44:31,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:31,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 13:44:31,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=932, Unknown=2, NotChecked=126, Total=1190 [2023-08-24 13:44:31,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 488 [2023-08-24 13:44:31,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 254 transitions, 4266 flow. Second operand has 35 states, 35 states have (on average 156.71428571428572) internal successors, (5485), 35 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:31,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:31,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 488 [2023-08-24 13:44:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:33,118 INFO L124 PetriNetUnfolderBase]: 1563/2871 cut-off events. [2023-08-24 13:44:33,119 INFO L125 PetriNetUnfolderBase]: For 70240/70240 co-relation queries the response was YES. [2023-08-24 13:44:33,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24574 conditions, 2871 events. 1563/2871 cut-off events. For 70240/70240 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18340 event pairs, 282 based on Foata normal form. 2/2873 useless extension candidates. Maximal degree in co-relation 24423. Up to 1508 conditions per place. [2023-08-24 13:44:33,147 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 180 selfloop transitions, 117 changer transitions 5/302 dead transitions. [2023-08-24 13:44:33,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 302 transitions, 5484 flow [2023-08-24 13:44:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:44:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:44:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2092 transitions. [2023-08-24 13:44:33,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3297604035308953 [2023-08-24 13:44:33,150 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2092 transitions. [2023-08-24 13:44:33,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2092 transitions. [2023-08-24 13:44:33,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:33,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2092 transitions. [2023-08-24 13:44:33,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 160.92307692307693) internal successors, (2092), 13 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:33,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:33,157 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:33,157 INFO L175 Difference]: Start difference. First operand has 217 places, 254 transitions, 4266 flow. Second operand 13 states and 2092 transitions. [2023-08-24 13:44:33,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 302 transitions, 5484 flow [2023-08-24 13:44:33,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 5338 flow, removed 57 selfloop flow, removed 7 redundant places. [2023-08-24 13:44:33,333 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 4692 flow [2023-08-24 13:44:33,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4692, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2023-08-24 13:44:33,334 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 203 predicate places. [2023-08-24 13:44:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 4692 flow [2023-08-24 13:44:33,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 156.71428571428572) internal successors, (5485), 35 states have internal predecessors, (5485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:33,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:33,334 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:33,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:33,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 13:44:33,535 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:33,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:33,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1826373846, now seen corresponding path program 19 times [2023-08-24 13:44:33,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:33,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482209536] [2023-08-24 13:44:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:34,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482209536] [2023-08-24 13:44:34,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482209536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:34,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104820160] [2023-08-24 13:44:34,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:44:34,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:34,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:34,217 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:34,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 13:44:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:34,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:44:34,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:34,538 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:34,538 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 27 treesize of output 19 [2023-08-24 13:44:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:34,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:35,089 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:44:35,089 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 58 treesize of output 58 [2023-08-24 13:44:35,119 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-08-24 13:44:35,120 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 11 [2023-08-24 13:44:35,127 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:44:35,128 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 58 treesize of output 1 [2023-08-24 13:44:35,133 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:44:35,133 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 58 treesize of output 1 [2023-08-24 13:44:35,136 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 13:44:35,142 INFO L322 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-08-24 13:44:35,143 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2023-08-24 13:44:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104820160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:35,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:35,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:44:35,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909848261] [2023-08-24 13:44:35,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:35,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:44:35,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:44:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:44:35,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:44:35,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 4692 flow. Second operand has 23 states, 23 states have (on average 164.08695652173913) internal successors, (3774), 23 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:35,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:35,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:44:35,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:36,272 INFO L124 PetriNetUnfolderBase]: 1551/2857 cut-off events. [2023-08-24 13:44:36,272 INFO L125 PetriNetUnfolderBase]: For 72039/72039 co-relation queries the response was YES. [2023-08-24 13:44:36,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25142 conditions, 2857 events. 1551/2857 cut-off events. For 72039/72039 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18302 event pairs, 576 based on Foata normal form. 14/2871 useless extension candidates. Maximal degree in co-relation 24985. Up to 2410 conditions per place. [2023-08-24 13:44:36,300 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 194 selfloop transitions, 87 changer transitions 6/287 dead transitions. [2023-08-24 13:44:36,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 287 transitions, 5471 flow [2023-08-24 13:44:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:44:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:44:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2004 transitions. [2023-08-24 13:44:36,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3422131147540984 [2023-08-24 13:44:36,302 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2004 transitions. [2023-08-24 13:44:36,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2004 transitions. [2023-08-24 13:44:36,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:36,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2004 transitions. [2023-08-24 13:44:36,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.0) internal successors, (2004), 12 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:36,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:36,307 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:36,307 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 4692 flow. Second operand 12 states and 2004 transitions. [2023-08-24 13:44:36,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 287 transitions, 5471 flow [2023-08-24 13:44:36,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 5296 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-08-24 13:44:36,504 INFO L231 Difference]: Finished difference. Result has 231 places, 265 transitions, 4750 flow [2023-08-24 13:44:36,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4750, PETRI_PLACES=231, PETRI_TRANSITIONS=265} [2023-08-24 13:44:36,505 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 208 predicate places. [2023-08-24 13:44:36,505 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 265 transitions, 4750 flow [2023-08-24 13:44:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 164.08695652173913) internal successors, (3774), 23 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:36,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:36,506 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:36,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:36,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:36,710 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:36,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1811298281, now seen corresponding path program 20 times [2023-08-24 13:44:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:36,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417371101] [2023-08-24 13:44:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:36,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:37,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417371101] [2023-08-24 13:44:37,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417371101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:37,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642851497] [2023-08-24 13:44:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:44:37,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:37,341 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:37,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 13:44:37,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:44:37,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:37,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:44:37,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:37,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:37,677 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 65 treesize of output 41 [2023-08-24 13:44:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:37,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:37,922 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:37,922 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 32 treesize of output 48 [2023-08-24 13:44:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:37,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642851497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:37,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:37,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:44:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060665575] [2023-08-24 13:44:37,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:44:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:44:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:44:37,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:44:37,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 265 transitions, 4750 flow. Second operand has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:37,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:37,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:44:37,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:39,278 INFO L124 PetriNetUnfolderBase]: 1601/2943 cut-off events. [2023-08-24 13:44:39,279 INFO L125 PetriNetUnfolderBase]: For 78783/78783 co-relation queries the response was YES. [2023-08-24 13:44:39,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26078 conditions, 2943 events. 1601/2943 cut-off events. For 78783/78783 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19071 event pairs, 304 based on Foata normal form. 8/2951 useless extension candidates. Maximal degree in co-relation 25923. Up to 1083 conditions per place. [2023-08-24 13:44:39,304 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 259 selfloop transitions, 124 changer transitions 2/385 dead transitions. [2023-08-24 13:44:39,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 385 transitions, 7550 flow [2023-08-24 13:44:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:44:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:44:39,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2576 transitions. [2023-08-24 13:44:39,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519125683060109 [2023-08-24 13:44:39,308 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2576 transitions. [2023-08-24 13:44:39,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2576 transitions. [2023-08-24 13:44:39,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:39,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2576 transitions. [2023-08-24 13:44:39,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 171.73333333333332) internal successors, (2576), 15 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:39,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:39,316 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:39,317 INFO L175 Difference]: Start difference. First operand has 231 places, 265 transitions, 4750 flow. Second operand 15 states and 2576 transitions. [2023-08-24 13:44:39,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 385 transitions, 7550 flow [2023-08-24 13:44:39,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 385 transitions, 7253 flow, removed 31 selfloop flow, removed 10 redundant places. [2023-08-24 13:44:39,502 INFO L231 Difference]: Finished difference. Result has 238 places, 283 transitions, 5136 flow [2023-08-24 13:44:39,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5136, PETRI_PLACES=238, PETRI_TRANSITIONS=283} [2023-08-24 13:44:39,503 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 215 predicate places. [2023-08-24 13:44:39,503 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 283 transitions, 5136 flow [2023-08-24 13:44:39,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:39,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:39,504 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:39,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 13:44:39,705 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:39,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1695260989, now seen corresponding path program 21 times [2023-08-24 13:44:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13432047] [2023-08-24 13:44:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:40,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:40,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13432047] [2023-08-24 13:44:40,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13432047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:40,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282955263] [2023-08-24 13:44:40,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:44:40,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:40,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:40,389 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:40,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 13:44:40,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:44:40,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:40,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:44:40,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:40,781 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:44:40,782 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 59 treesize of output 31 [2023-08-24 13:44:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:40,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:41,074 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:41,075 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 32 treesize of output 48 [2023-08-24 13:44:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:41,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282955263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:41,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:41,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-24 13:44:41,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608817197] [2023-08-24 13:44:41,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:41,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:44:41,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:44:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:44:41,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:44:41,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 283 transitions, 5136 flow. Second operand has 22 states, 22 states have (on average 164.1818181818182) internal successors, (3612), 22 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:41,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:41,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:44:41,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:42,267 INFO L124 PetriNetUnfolderBase]: 1649/3043 cut-off events. [2023-08-24 13:44:42,267 INFO L125 PetriNetUnfolderBase]: For 81134/81134 co-relation queries the response was YES. [2023-08-24 13:44:42,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27593 conditions, 3043 events. 1649/3043 cut-off events. For 81134/81134 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 19927 event pairs, 236 based on Foata normal form. 8/3051 useless extension candidates. Maximal degree in co-relation 27435. Up to 1162 conditions per place. [2023-08-24 13:44:42,301 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 237 selfloop transitions, 108 changer transitions 20/365 dead transitions. [2023-08-24 13:44:42,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 365 transitions, 7225 flow [2023-08-24 13:44:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:44:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:44:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1858 transitions. [2023-08-24 13:44:42,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3461251862891207 [2023-08-24 13:44:42,303 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1858 transitions. [2023-08-24 13:44:42,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1858 transitions. [2023-08-24 13:44:42,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:42,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1858 transitions. [2023-08-24 13:44:42,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.9090909090909) internal successors, (1858), 11 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:42,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:42,309 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:42,309 INFO L175 Difference]: Start difference. First operand has 238 places, 283 transitions, 5136 flow. Second operand 11 states and 1858 transitions. [2023-08-24 13:44:42,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 365 transitions, 7225 flow [2023-08-24 13:44:42,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 365 transitions, 7028 flow, removed 51 selfloop flow, removed 5 redundant places. [2023-08-24 13:44:42,533 INFO L231 Difference]: Finished difference. Result has 246 places, 283 transitions, 5143 flow [2023-08-24 13:44:42,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5143, PETRI_PLACES=246, PETRI_TRANSITIONS=283} [2023-08-24 13:44:42,534 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 223 predicate places. [2023-08-24 13:44:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 283 transitions, 5143 flow [2023-08-24 13:44:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 164.1818181818182) internal successors, (3612), 22 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:42,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:42,535 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:42,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:42,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:42,741 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:42,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1870432805, now seen corresponding path program 22 times [2023-08-24 13:44:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:42,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630811072] [2023-08-24 13:44:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:42,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:43,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:43,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630811072] [2023-08-24 13:44:43,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630811072] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:43,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537749527] [2023-08-24 13:44:43,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:44:43,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:43,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:43,386 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:43,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 13:44:43,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:44:43,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:43,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 13:44:43,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:43,786 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:43,786 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 65 treesize of output 41 [2023-08-24 13:44:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:43,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:44,031 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:44,031 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 32 treesize of output 48 [2023-08-24 13:44:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:44,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537749527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:44,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:44,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2023-08-24 13:44:44,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728282335] [2023-08-24 13:44:44,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:44,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:44:44,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:44,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:44:44,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:44:44,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:44:44,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 283 transitions, 5143 flow. Second operand has 23 states, 23 states have (on average 164.17391304347825) internal successors, (3776), 23 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:44,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:44,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:44:44,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:46,094 INFO L124 PetriNetUnfolderBase]: 1721/3197 cut-off events. [2023-08-24 13:44:46,094 INFO L125 PetriNetUnfolderBase]: For 87472/87472 co-relation queries the response was YES. [2023-08-24 13:44:46,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29156 conditions, 3197 events. 1721/3197 cut-off events. For 87472/87472 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 21383 event pairs, 342 based on Foata normal form. 8/3205 useless extension candidates. Maximal degree in co-relation 28995. Up to 1215 conditions per place. [2023-08-24 13:44:46,129 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 265 selfloop transitions, 169 changer transitions 17/451 dead transitions. [2023-08-24 13:44:46,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 451 transitions, 8878 flow [2023-08-24 13:44:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 13:44:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 13:44:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4020 transitions. [2023-08-24 13:44:46,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432377049180328 [2023-08-24 13:44:46,133 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4020 transitions. [2023-08-24 13:44:46,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4020 transitions. [2023-08-24 13:44:46,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:46,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4020 transitions. [2023-08-24 13:44:46,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 167.5) internal successors, (4020), 24 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:46,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:46,146 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:46,146 INFO L175 Difference]: Start difference. First operand has 246 places, 283 transitions, 5143 flow. Second operand 24 states and 4020 transitions. [2023-08-24 13:44:46,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 451 transitions, 8878 flow [2023-08-24 13:44:46,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 451 transitions, 8724 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-08-24 13:44:46,414 INFO L231 Difference]: Finished difference. Result has 264 places, 326 transitions, 6327 flow [2023-08-24 13:44:46,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6327, PETRI_PLACES=264, PETRI_TRANSITIONS=326} [2023-08-24 13:44:46,414 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 241 predicate places. [2023-08-24 13:44:46,414 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 326 transitions, 6327 flow [2023-08-24 13:44:46,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 164.17391304347825) internal successors, (3776), 23 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:46,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:46,415 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:46,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:46,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-24 13:44:46,616 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:46,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:46,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1656930523, now seen corresponding path program 23 times [2023-08-24 13:44:46,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:46,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290525786] [2023-08-24 13:44:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:46,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:47,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:47,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290525786] [2023-08-24 13:44:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290525786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:47,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385411406] [2023-08-24 13:44:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:44:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:47,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:47,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 13:44:47,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:44:47,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:47,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:44:47,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:47,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:47,900 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:47,900 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 32 treesize of output 48 [2023-08-24 13:44:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:47,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385411406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:47,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:47,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:44:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553651767] [2023-08-24 13:44:47,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:47,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:44:47,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:44:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:44:47,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:44:47,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 326 transitions, 6327 flow. Second operand has 21 states, 21 states have (on average 167.1904761904762) internal successors, (3511), 21 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:47,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:47,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:44:47,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:49,237 INFO L124 PetriNetUnfolderBase]: 1843/3389 cut-off events. [2023-08-24 13:44:49,238 INFO L125 PetriNetUnfolderBase]: For 96810/96810 co-relation queries the response was YES. [2023-08-24 13:44:49,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32683 conditions, 3389 events. 1843/3389 cut-off events. For 96810/96810 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 22510 event pairs, 396 based on Foata normal form. 8/3397 useless extension candidates. Maximal degree in co-relation 32519. Up to 1409 conditions per place. [2023-08-24 13:44:49,275 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 205 selfloop transitions, 219 changer transitions 12/436 dead transitions. [2023-08-24 13:44:49,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 436 transitions, 9172 flow [2023-08-24 13:44:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:44:49,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:44:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2232 transitions. [2023-08-24 13:44:49,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35182849936948296 [2023-08-24 13:44:49,278 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2232 transitions. [2023-08-24 13:44:49,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2232 transitions. [2023-08-24 13:44:49,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:49,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2232 transitions. [2023-08-24 13:44:49,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 171.69230769230768) internal successors, (2232), 13 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:49,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:49,285 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:49,285 INFO L175 Difference]: Start difference. First operand has 264 places, 326 transitions, 6327 flow. Second operand 13 states and 2232 transitions. [2023-08-24 13:44:49,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 436 transitions, 9172 flow [2023-08-24 13:44:49,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 436 transitions, 8785 flow, removed 86 selfloop flow, removed 9 redundant places. [2023-08-24 13:44:49,591 INFO L231 Difference]: Finished difference. Result has 268 places, 379 transitions, 7682 flow [2023-08-24 13:44:49,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=5946, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7682, PETRI_PLACES=268, PETRI_TRANSITIONS=379} [2023-08-24 13:44:49,592 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 245 predicate places. [2023-08-24 13:44:49,592 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 379 transitions, 7682 flow [2023-08-24 13:44:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.1904761904762) internal successors, (3511), 21 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:49,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:49,593 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:49,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:49,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:49,793 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:49,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:49,794 INFO L85 PathProgramCache]: Analyzing trace with hash -358022245, now seen corresponding path program 24 times [2023-08-24 13:44:49,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122135731] [2023-08-24 13:44:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:49,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:50,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122135731] [2023-08-24 13:44:50,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122135731] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:50,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564670934] [2023-08-24 13:44:50,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:44:50,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:50,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:50,476 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:50,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 13:44:50,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:44:50,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:50,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:44:50,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:50,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:50,991 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:50,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-08-24 13:44:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:51,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564670934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:51,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:51,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:44:51,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887102521] [2023-08-24 13:44:51,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:51,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:44:51,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:51,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:44:51,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:44:51,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:44:51,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 379 transitions, 7682 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:51,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:51,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:44:51,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:52,089 INFO L124 PetriNetUnfolderBase]: 1821/3341 cut-off events. [2023-08-24 13:44:52,089 INFO L125 PetriNetUnfolderBase]: For 99504/99504 co-relation queries the response was YES. [2023-08-24 13:44:52,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33742 conditions, 3341 events. 1821/3341 cut-off events. For 99504/99504 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22108 event pairs, 546 based on Foata normal form. 8/3349 useless extension candidates. Maximal degree in co-relation 33575. Up to 2449 conditions per place. [2023-08-24 13:44:52,127 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 221 selfloop transitions, 184 changer transitions 12/417 dead transitions. [2023-08-24 13:44:52,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 417 transitions, 9050 flow [2023-08-24 13:44:52,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:44:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:44:52,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1880 transitions. [2023-08-24 13:44:52,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502235469448584 [2023-08-24 13:44:52,129 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1880 transitions. [2023-08-24 13:44:52,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1880 transitions. [2023-08-24 13:44:52,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:52,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1880 transitions. [2023-08-24 13:44:52,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 170.9090909090909) internal successors, (1880), 11 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,134 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,134 INFO L175 Difference]: Start difference. First operand has 268 places, 379 transitions, 7682 flow. Second operand 11 states and 1880 transitions. [2023-08-24 13:44:52,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 417 transitions, 9050 flow [2023-08-24 13:44:52,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 417 transitions, 8840 flow, removed 37 selfloop flow, removed 6 redundant places. [2023-08-24 13:44:52,454 INFO L231 Difference]: Finished difference. Result has 270 places, 380 transitions, 8011 flow [2023-08-24 13:44:52,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=7472, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8011, PETRI_PLACES=270, PETRI_TRANSITIONS=380} [2023-08-24 13:44:52,454 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 247 predicate places. [2023-08-24 13:44:52,455 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 380 transitions, 8011 flow [2023-08-24 13:44:52,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:52,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:52,455 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:52,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:52,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:52,656 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:52,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1004677003, now seen corresponding path program 25 times [2023-08-24 13:44:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:52,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673406117] [2023-08-24 13:44:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:44:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673406117] [2023-08-24 13:44:53,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673406117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:53,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765780401] [2023-08-24 13:44:53,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:44:53,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:53,583 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:53,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 13:44:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:53,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:44:53,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:53,957 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:44:53,957 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 46 treesize of output 30 [2023-08-24 13:44:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:54,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:54,246 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:54,246 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 32 treesize of output 48 [2023-08-24 13:44:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:54,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765780401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:54,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:54,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 27 [2023-08-24 13:44:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588571596] [2023-08-24 13:44:54,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:54,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 13:44:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 13:44:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2023-08-24 13:44:54,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 488 [2023-08-24 13:44:54,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 380 transitions, 8011 flow. Second operand has 27 states, 27 states have (on average 144.92592592592592) internal successors, (3913), 27 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:54,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:54,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 488 [2023-08-24 13:44:54,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:55,947 INFO L124 PetriNetUnfolderBase]: 1855/3393 cut-off events. [2023-08-24 13:44:55,947 INFO L125 PetriNetUnfolderBase]: For 109844/109844 co-relation queries the response was YES. [2023-08-24 13:44:55,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35574 conditions, 3393 events. 1855/3393 cut-off events. For 109844/109844 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 22421 event pairs, 490 based on Foata normal form. 8/3401 useless extension candidates. Maximal degree in co-relation 35405. Up to 2002 conditions per place. [2023-08-24 13:44:55,995 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 269 selfloop transitions, 167 changer transitions 1/437 dead transitions. [2023-08-24 13:44:55,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 437 transitions, 9926 flow [2023-08-24 13:44:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 13:44:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 13:44:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2513 transitions. [2023-08-24 13:44:55,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30291706846673094 [2023-08-24 13:44:55,998 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2513 transitions. [2023-08-24 13:44:55,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2513 transitions. [2023-08-24 13:44:55,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:55,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2513 transitions. [2023-08-24 13:44:56,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 147.8235294117647) internal successors, (2513), 17 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:56,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 488.0) internal successors, (8784), 18 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:56,007 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 488.0) internal successors, (8784), 18 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:56,007 INFO L175 Difference]: Start difference. First operand has 270 places, 380 transitions, 8011 flow. Second operand 17 states and 2513 transitions. [2023-08-24 13:44:56,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 437 transitions, 9926 flow [2023-08-24 13:44:56,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 437 transitions, 9775 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 13:44:56,335 INFO L231 Difference]: Finished difference. Result has 277 places, 385 transitions, 8361 flow [2023-08-24 13:44:56,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=7870, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8361, PETRI_PLACES=277, PETRI_TRANSITIONS=385} [2023-08-24 13:44:56,336 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 254 predicate places. [2023-08-24 13:44:56,336 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 385 transitions, 8361 flow [2023-08-24 13:44:56,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 144.92592592592592) internal successors, (3913), 27 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:56,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:56,337 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:56,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 13:44:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:56,538 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:44:56,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:44:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash 580166947, now seen corresponding path program 26 times [2023-08-24 13:44:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:44:56,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357525790] [2023-08-24 13:44:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:44:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:44:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:44:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:57,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:44:57,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357525790] [2023-08-24 13:44:57,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357525790] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:44:57,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793746235] [2023-08-24 13:44:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:44:57,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:44:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:44:57,097 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:44:57,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 13:44:57,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:44:57,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:44:57,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:44:57,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:44:57,523 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:44:57,523 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 25 treesize of output 9 [2023-08-24 13:44:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:57,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:44:57,932 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:44:57,932 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 32 treesize of output 48 [2023-08-24 13:44:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:44:57,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793746235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:44:57,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:44:57,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-24 13:44:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794982076] [2023-08-24 13:44:57,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:44:57,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:44:57,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:44:57,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:44:57,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:44:57,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:44:57,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 385 transitions, 8361 flow. Second operand has 22 states, 22 states have (on average 164.13636363636363) internal successors, (3611), 22 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:57,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:44:57,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:44:57,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:44:59,440 INFO L124 PetriNetUnfolderBase]: 1943/3545 cut-off events. [2023-08-24 13:44:59,440 INFO L125 PetriNetUnfolderBase]: For 121341/121341 co-relation queries the response was YES. [2023-08-24 13:44:59,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38879 conditions, 3545 events. 1943/3545 cut-off events. For 121341/121341 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 23550 event pairs, 314 based on Foata normal form. 20/3565 useless extension candidates. Maximal degree in co-relation 38703. Up to 2528 conditions per place. [2023-08-24 13:44:59,482 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 235 selfloop transitions, 204 changer transitions 1/440 dead transitions. [2023-08-24 13:44:59,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 440 transitions, 10461 flow [2023-08-24 13:44:59,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:44:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:44:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2677 transitions. [2023-08-24 13:44:59,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3428534836065574 [2023-08-24 13:44:59,485 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2677 transitions. [2023-08-24 13:44:59,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2677 transitions. [2023-08-24 13:44:59,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:44:59,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2677 transitions. [2023-08-24 13:44:59,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.3125) internal successors, (2677), 16 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:59,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:59,494 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:59,494 INFO L175 Difference]: Start difference. First operand has 277 places, 385 transitions, 8361 flow. Second operand 16 states and 2677 transitions. [2023-08-24 13:44:59,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 440 transitions, 10461 flow [2023-08-24 13:44:59,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 440 transitions, 10042 flow, removed 31 selfloop flow, removed 14 redundant places. [2023-08-24 13:44:59,942 INFO L231 Difference]: Finished difference. Result has 283 places, 399 transitions, 9052 flow [2023-08-24 13:44:59,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=7966, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9052, PETRI_PLACES=283, PETRI_TRANSITIONS=399} [2023-08-24 13:44:59,942 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 260 predicate places. [2023-08-24 13:44:59,942 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 399 transitions, 9052 flow [2023-08-24 13:44:59,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 164.13636363636363) internal successors, (3611), 22 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:44:59,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:44:59,943 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:44:59,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 13:45:00,144 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:00,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -689753135, now seen corresponding path program 27 times [2023-08-24 13:45:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075231578] [2023-08-24 13:45:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:00,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:00,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075231578] [2023-08-24 13:45:00,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075231578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:00,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460189652] [2023-08-24 13:45:00,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:45:00,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:00,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:00,713 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:00,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 13:45:01,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:45:01,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:01,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:45:01,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:01,135 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:45:01,136 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 26 treesize of output 14 [2023-08-24 13:45:01,146 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:45:01,146 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 25 treesize of output 9 [2023-08-24 13:45:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:01,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:01,471 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:45:01,471 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 32 treesize of output 48 [2023-08-24 13:45:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:01,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460189652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:01,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:01,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 13:45:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061308298] [2023-08-24 13:45:01,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:45:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:45:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:45:01,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:01,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 399 transitions, 9052 flow. Second operand has 21 states, 21 states have (on average 167.0) internal successors, (3507), 21 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:01,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:01,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:01,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:03,745 INFO L124 PetriNetUnfolderBase]: 2093/3855 cut-off events. [2023-08-24 13:45:03,745 INFO L125 PetriNetUnfolderBase]: For 156087/156087 co-relation queries the response was YES. [2023-08-24 13:45:03,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44755 conditions, 3855 events. 2093/3855 cut-off events. For 156087/156087 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 26585 event pairs, 498 based on Foata normal form. 36/3891 useless extension candidates. Maximal degree in co-relation 44587. Up to 2115 conditions per place. [2023-08-24 13:45:03,795 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 319 selfloop transitions, 190 changer transitions 2/511 dead transitions. [2023-08-24 13:45:03,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 511 transitions, 12505 flow [2023-08-24 13:45:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 13:45:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 13:45:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4092 transitions. [2023-08-24 13:45:03,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34938524590163933 [2023-08-24 13:45:03,799 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4092 transitions. [2023-08-24 13:45:03,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4092 transitions. [2023-08-24 13:45:03,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:03,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4092 transitions. [2023-08-24 13:45:03,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 170.5) internal successors, (4092), 24 states have internal predecessors, (4092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:03,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:03,809 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:03,809 INFO L175 Difference]: Start difference. First operand has 283 places, 399 transitions, 9052 flow. Second operand 24 states and 4092 transitions. [2023-08-24 13:45:03,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 511 transitions, 12505 flow [2023-08-24 13:45:04,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 511 transitions, 12057 flow, removed 130 selfloop flow, removed 9 redundant places. [2023-08-24 13:45:04,256 INFO L231 Difference]: Finished difference. Result has 306 places, 426 transitions, 10092 flow [2023-08-24 13:45:04,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=8658, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10092, PETRI_PLACES=306, PETRI_TRANSITIONS=426} [2023-08-24 13:45:04,256 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 283 predicate places. [2023-08-24 13:45:04,256 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 426 transitions, 10092 flow [2023-08-24 13:45:04,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0) internal successors, (3507), 21 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:04,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:04,257 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:04,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 13:45:04,457 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:04,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash 873512725, now seen corresponding path program 28 times [2023-08-24 13:45:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422117135] [2023-08-24 13:45:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:05,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422117135] [2023-08-24 13:45:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422117135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:05,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644279010] [2023-08-24 13:45:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:45:05,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:05,029 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:05,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 13:45:05,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:45:05,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:45:05,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:05,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:05,335 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 65 treesize of output 41 [2023-08-24 13:45:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:05,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:05,550 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:45:05,551 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 32 treesize of output 48 [2023-08-24 13:45:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:05,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644279010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:05,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:05,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:45:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320117898] [2023-08-24 13:45:05,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:05,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:45:05,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:05,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:45:05,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:45:05,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:05,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 426 transitions, 10092 flow. Second operand has 20 states, 20 states have (on average 167.3) internal successors, (3346), 20 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:05,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:05,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:05,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:07,285 INFO L124 PetriNetUnfolderBase]: 2169/3975 cut-off events. [2023-08-24 13:45:07,285 INFO L125 PetriNetUnfolderBase]: For 187895/187895 co-relation queries the response was YES. [2023-08-24 13:45:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48840 conditions, 3975 events. 2169/3975 cut-off events. For 187895/187895 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 27478 event pairs, 582 based on Foata normal form. 8/3983 useless extension candidates. Maximal degree in co-relation 48663. Up to 2605 conditions per place. [2023-08-24 13:45:07,337 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 294 selfloop transitions, 184 changer transitions 5/483 dead transitions. [2023-08-24 13:45:07,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 483 transitions, 12217 flow [2023-08-24 13:45:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:45:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:45:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2718 transitions. [2023-08-24 13:45:07,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481045081967213 [2023-08-24 13:45:07,339 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2718 transitions. [2023-08-24 13:45:07,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2718 transitions. [2023-08-24 13:45:07,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:07,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2718 transitions. [2023-08-24 13:45:07,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 169.875) internal successors, (2718), 16 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 13:45:07,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:07,344 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:07,345 INFO L175 Difference]: Start difference. First operand has 306 places, 426 transitions, 10092 flow. Second operand 16 states and 2718 transitions. [2023-08-24 13:45:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 483 transitions, 12217 flow [2023-08-24 13:45:08,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 483 transitions, 11411 flow, removed 268 selfloop flow, removed 10 redundant places. [2023-08-24 13:45:08,041 INFO L231 Difference]: Finished difference. Result has 312 places, 434 transitions, 10052 flow [2023-08-24 13:45:08,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=9365, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10052, PETRI_PLACES=312, PETRI_TRANSITIONS=434} [2023-08-24 13:45:08,042 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 289 predicate places. [2023-08-24 13:45:08,042 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 434 transitions, 10052 flow [2023-08-24 13:45:08,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.3) internal successors, (3346), 20 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:08,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:08,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:08,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:08,247 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:08,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:08,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1029586111, now seen corresponding path program 29 times [2023-08-24 13:45:08,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:08,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696780564] [2023-08-24 13:45:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:08,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696780564] [2023-08-24 13:45:08,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696780564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534111204] [2023-08-24 13:45:08,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:45:08,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:08,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:08,846 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:08,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 13:45:09,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:45:09,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:09,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:45:09,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:09,180 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:45:09,180 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 26 treesize of output 14 [2023-08-24 13:45:09,188 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:45:09,188 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 25 treesize of output 9 [2023-08-24 13:45:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:09,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:09,442 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:45:09,442 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 32 treesize of output 48 [2023-08-24 13:45:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534111204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:09,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:45:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091815486] [2023-08-24 13:45:09,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:45:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:45:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:45:09,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:09,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 434 transitions, 10052 flow. Second operand has 20 states, 20 states have (on average 167.3) internal successors, (3346), 20 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:09,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:09,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:09,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:11,003 INFO L124 PetriNetUnfolderBase]: 2135/3893 cut-off events. [2023-08-24 13:45:11,003 INFO L125 PetriNetUnfolderBase]: For 176335/176335 co-relation queries the response was YES. [2023-08-24 13:45:11,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47398 conditions, 3893 events. 2135/3893 cut-off events. For 176335/176335 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 26684 event pairs, 542 based on Foata normal form. 8/3901 useless extension candidates. Maximal degree in co-relation 47219. Up to 2445 conditions per place. [2023-08-24 13:45:11,053 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 300 selfloop transitions, 171 changer transitions 6/477 dead transitions. [2023-08-24 13:45:11,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 477 transitions, 11797 flow [2023-08-24 13:45:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:45:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:45:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2384 transitions. [2023-08-24 13:45:11,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34894613583138173 [2023-08-24 13:45:11,055 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2384 transitions. [2023-08-24 13:45:11,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2384 transitions. [2023-08-24 13:45:11,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:11,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2384 transitions. [2023-08-24 13:45:11,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.28571428571428) internal successors, (2384), 14 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:11,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:11,060 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:11,060 INFO L175 Difference]: Start difference. First operand has 312 places, 434 transitions, 10052 flow. Second operand 14 states and 2384 transitions. [2023-08-24 13:45:11,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 477 transitions, 11797 flow [2023-08-24 13:45:11,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 477 transitions, 11391 flow, removed 63 selfloop flow, removed 13 redundant places. [2023-08-24 13:45:11,696 INFO L231 Difference]: Finished difference. Result has 310 places, 431 transitions, 9958 flow [2023-08-24 13:45:11,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=9629, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9958, PETRI_PLACES=310, PETRI_TRANSITIONS=431} [2023-08-24 13:45:11,697 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 287 predicate places. [2023-08-24 13:45:11,697 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 431 transitions, 9958 flow [2023-08-24 13:45:11,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.3) internal successors, (3346), 20 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:11,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:11,698 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:11,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:11,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 13:45:11,904 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:11,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 56816063, now seen corresponding path program 30 times [2023-08-24 13:45:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:11,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321785827] [2023-08-24 13:45:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:11,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:12,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:12,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321785827] [2023-08-24 13:45:12,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321785827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:12,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053240375] [2023-08-24 13:45:12,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:45:12,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:12,425 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:12,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 13:45:12,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:45:12,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:12,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:45:12,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:12,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:12,922 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:45:12,923 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 74 treesize of output 91 [2023-08-24 13:45:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053240375] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:13,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:45:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442409289] [2023-08-24 13:45:13,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:45:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:45:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:45:13,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:13,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 431 transitions, 9958 flow. Second operand has 19 states, 19 states have (on average 167.21052631578948) internal successors, (3177), 19 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:13,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:13,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:14,377 INFO L124 PetriNetUnfolderBase]: 2179/3951 cut-off events. [2023-08-24 13:45:14,377 INFO L125 PetriNetUnfolderBase]: For 176533/176533 co-relation queries the response was YES. [2023-08-24 13:45:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48403 conditions, 3951 events. 2179/3951 cut-off events. For 176533/176533 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 26970 event pairs, 499 based on Foata normal form. 8/3959 useless extension candidates. Maximal degree in co-relation 48225. Up to 2303 conditions per place. [2023-08-24 13:45:14,426 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 294 selfloop transitions, 208 changer transitions 1/503 dead transitions. [2023-08-24 13:45:14,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 503 transitions, 12498 flow [2023-08-24 13:45:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:45:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:45:14,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2382 transitions. [2023-08-24 13:45:14,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34865339578454335 [2023-08-24 13:45:14,428 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2382 transitions. [2023-08-24 13:45:14,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2382 transitions. [2023-08-24 13:45:14,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:14,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2382 transitions. [2023-08-24 13:45:14,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.14285714285714) internal successors, (2382), 14 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:14,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:14,433 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:14,433 INFO L175 Difference]: Start difference. First operand has 310 places, 431 transitions, 9958 flow. Second operand 14 states and 2382 transitions. [2023-08-24 13:45:14,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 503 transitions, 12498 flow [2023-08-24 13:45:14,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 503 transitions, 12118 flow, removed 59 selfloop flow, removed 11 redundant places. [2023-08-24 13:45:14,991 INFO L231 Difference]: Finished difference. Result has 312 places, 438 transitions, 10470 flow [2023-08-24 13:45:14,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=9637, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10470, PETRI_PLACES=312, PETRI_TRANSITIONS=438} [2023-08-24 13:45:14,992 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 289 predicate places. [2023-08-24 13:45:14,992 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 438 transitions, 10470 flow [2023-08-24 13:45:14,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.21052631578948) internal successors, (3177), 19 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:14,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:14,992 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:14,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:15,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 13:45:15,193 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:15,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1686699201, now seen corresponding path program 31 times [2023-08-24 13:45:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:15,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144873534] [2023-08-24 13:45:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:15,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:15,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144873534] [2023-08-24 13:45:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144873534] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997422538] [2023-08-24 13:45:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:45:15,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:15,684 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:15,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 13:45:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:15,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:45:15,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:16,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:16,216 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:45:16,216 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 40 treesize of output 56 [2023-08-24 13:45:16,233 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:45:16,234 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 20 treesize of output 4 [2023-08-24 13:45:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:16,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997422538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:16,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:16,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-24 13:45:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151472337] [2023-08-24 13:45:16,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:16,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 13:45:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 13:45:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-08-24 13:45:16,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:16,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 438 transitions, 10470 flow. Second operand has 18 states, 18 states have (on average 167.16666666666666) internal successors, (3009), 18 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:16,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:16,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:16,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:17,690 INFO L124 PetriNetUnfolderBase]: 2227/4031 cut-off events. [2023-08-24 13:45:17,690 INFO L125 PetriNetUnfolderBase]: For 181523/181523 co-relation queries the response was YES. [2023-08-24 13:45:17,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50176 conditions, 4031 events. 2227/4031 cut-off events. For 181523/181523 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 27575 event pairs, 522 based on Foata normal form. 8/4039 useless extension candidates. Maximal degree in co-relation 49997. Up to 2353 conditions per place. [2023-08-24 13:45:17,839 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 282 selfloop transitions, 207 changer transitions 1/490 dead transitions. [2023-08-24 13:45:17,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 490 transitions, 12535 flow [2023-08-24 13:45:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:45:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:45:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2043 transitions. [2023-08-24 13:45:17,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488729508196721 [2023-08-24 13:45:17,841 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2043 transitions. [2023-08-24 13:45:17,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2043 transitions. [2023-08-24 13:45:17,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:17,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2043 transitions. [2023-08-24 13:45:17,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.25) internal successors, (2043), 12 states have internal predecessors, (2043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:17,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:17,845 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:17,846 INFO L175 Difference]: Start difference. First operand has 312 places, 438 transitions, 10470 flow. Second operand 12 states and 2043 transitions. [2023-08-24 13:45:17,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 490 transitions, 12535 flow [2023-08-24 13:45:18,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 490 transitions, 12296 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-24 13:45:18,393 INFO L231 Difference]: Finished difference. Result has 312 places, 442 transitions, 10997 flow [2023-08-24 13:45:18,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=10233, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10997, PETRI_PLACES=312, PETRI_TRANSITIONS=442} [2023-08-24 13:45:18,394 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 289 predicate places. [2023-08-24 13:45:18,394 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 442 transitions, 10997 flow [2023-08-24 13:45:18,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 167.16666666666666) internal successors, (3009), 18 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:18,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:18,394 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:18,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:18,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 13:45:18,601 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:18,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1229385677, now seen corresponding path program 32 times [2023-08-24 13:45:18,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76857918] [2023-08-24 13:45:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:19,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:19,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76857918] [2023-08-24 13:45:19,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76857918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:19,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881219732] [2023-08-24 13:45:19,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:45:19,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:19,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:19,105 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:19,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 13:45:19,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:45:19,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:19,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:45:19,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:19,421 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:45:19,421 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 26 treesize of output 14 [2023-08-24 13:45:19,429 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:45:19,430 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 25 treesize of output 9 [2023-08-24 13:45:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:19,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:19,634 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:45:19,635 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 40 treesize of output 56 [2023-08-24 13:45:19,652 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:45:19,652 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 20 treesize of output 4 [2023-08-24 13:45:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881219732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:19,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:19,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:45:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500184662] [2023-08-24 13:45:19,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:19,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:45:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:45:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:45:19,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:19,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 442 transitions, 10997 flow. Second operand has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:19,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:19,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:19,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:21,329 INFO L124 PetriNetUnfolderBase]: 2267/4115 cut-off events. [2023-08-24 13:45:21,330 INFO L125 PetriNetUnfolderBase]: For 202932/202932 co-relation queries the response was YES. [2023-08-24 13:45:21,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53042 conditions, 4115 events. 2267/4115 cut-off events. For 202932/202932 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 28405 event pairs, 560 based on Foata normal form. 16/4131 useless extension candidates. Maximal degree in co-relation 52865. Up to 2541 conditions per place. [2023-08-24 13:45:21,387 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 293 selfloop transitions, 203 changer transitions 7/503 dead transitions. [2023-08-24 13:45:21,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 503 transitions, 13221 flow [2023-08-24 13:45:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:45:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:45:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2392 transitions. [2023-08-24 13:45:21,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35011709601873536 [2023-08-24 13:45:21,389 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2392 transitions. [2023-08-24 13:45:21,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2392 transitions. [2023-08-24 13:45:21,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:21,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2392 transitions. [2023-08-24 13:45:21,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.85714285714286) internal successors, (2392), 14 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:21,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:21,394 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:21,394 INFO L175 Difference]: Start difference. First operand has 312 places, 442 transitions, 10997 flow. Second operand 14 states and 2392 transitions. [2023-08-24 13:45:21,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 503 transitions, 13221 flow [2023-08-24 13:45:22,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 503 transitions, 13137 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-08-24 13:45:22,145 INFO L231 Difference]: Finished difference. Result has 322 places, 446 transitions, 11699 flow [2023-08-24 13:45:22,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11699, PETRI_PLACES=322, PETRI_TRANSITIONS=446} [2023-08-24 13:45:22,146 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 299 predicate places. [2023-08-24 13:45:22,147 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 446 transitions, 11699 flow [2023-08-24 13:45:22,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:22,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:22,147 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:22,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:22,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:22,353 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:22,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:22,353 INFO L85 PathProgramCache]: Analyzing trace with hash -830588737, now seen corresponding path program 33 times [2023-08-24 13:45:22,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:22,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023650793] [2023-08-24 13:45:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:22,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023650793] [2023-08-24 13:45:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023650793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572668391] [2023-08-24 13:45:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:45:22,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:22,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:22,855 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:22,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 13:45:23,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:45:23,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:23,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:45:23,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:23,227 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:23,227 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 46 treesize of output 30 [2023-08-24 13:45:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:23,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:23,422 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:45:23,423 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 40 treesize of output 56 [2023-08-24 13:45:23,438 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:45:23,439 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 20 treesize of output 4 [2023-08-24 13:45:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572668391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:23,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:23,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:45:23,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630425251] [2023-08-24 13:45:23,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:45:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:45:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:45:23,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:23,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 446 transitions, 11699 flow. Second operand has 19 states, 19 states have (on average 167.1578947368421) internal successors, (3176), 19 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:23,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:23,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:23,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:25,089 INFO L124 PetriNetUnfolderBase]: 2301/4165 cut-off events. [2023-08-24 13:45:25,089 INFO L125 PetriNetUnfolderBase]: For 228541/228541 co-relation queries the response was YES. [2023-08-24 13:45:25,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56059 conditions, 4165 events. 2301/4165 cut-off events. For 228541/228541 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 28732 event pairs, 502 based on Foata normal form. 8/4173 useless extension candidates. Maximal degree in co-relation 55877. Up to 2289 conditions per place. [2023-08-24 13:45:25,144 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 279 selfloop transitions, 225 changer transitions 2/506 dead transitions. [2023-08-24 13:45:25,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 506 transitions, 13785 flow [2023-08-24 13:45:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:45:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:45:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2390 transitions. [2023-08-24 13:45:25,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.349824355971897 [2023-08-24 13:45:25,146 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2390 transitions. [2023-08-24 13:45:25,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2390 transitions. [2023-08-24 13:45:25,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:25,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2390 transitions. [2023-08-24 13:45:25,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.71428571428572) internal successors, (2390), 14 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:25,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:25,151 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:25,151 INFO L175 Difference]: Start difference. First operand has 322 places, 446 transitions, 11699 flow. Second operand 14 states and 2390 transitions. [2023-08-24 13:45:25,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 506 transitions, 13785 flow [2023-08-24 13:45:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 506 transitions, 13662 flow, removed 43 selfloop flow, removed 6 redundant places. [2023-08-24 13:45:26,041 INFO L231 Difference]: Finished difference. Result has 329 places, 452 transitions, 12283 flow [2023-08-24 13:45:26,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=11589, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12283, PETRI_PLACES=329, PETRI_TRANSITIONS=452} [2023-08-24 13:45:26,042 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 306 predicate places. [2023-08-24 13:45:26,042 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 452 transitions, 12283 flow [2023-08-24 13:45:26,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.1578947368421) internal successors, (3176), 19 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:26,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:26,043 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:26,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-24 13:45:26,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:26,250 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:26,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:26,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2118398985, now seen corresponding path program 34 times [2023-08-24 13:45:26,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:26,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489749271] [2023-08-24 13:45:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:26,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:26,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:26,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489749271] [2023-08-24 13:45:26,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489749271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:26,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392774069] [2023-08-24 13:45:26,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:45:26,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:26,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:26,842 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 13:45:27,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:45:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:27,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:45:27,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:27,210 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:27,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-24 13:45:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:27,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:27,431 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:45:27,431 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 74 treesize of output 91 [2023-08-24 13:45:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:27,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392774069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:27,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:27,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:45:27,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326638746] [2023-08-24 13:45:27,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:27,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:45:27,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:45:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:45:27,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:27,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 452 transitions, 12283 flow. Second operand has 21 states, 21 states have (on average 167.04761904761904) internal successors, (3508), 21 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:27,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:27,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:27,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:29,745 INFO L124 PetriNetUnfolderBase]: 2417/4377 cut-off events. [2023-08-24 13:45:29,745 INFO L125 PetriNetUnfolderBase]: For 257002/257002 co-relation queries the response was YES. [2023-08-24 13:45:29,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61088 conditions, 4377 events. 2417/4377 cut-off events. For 257002/257002 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 30539 event pairs, 520 based on Foata normal form. 8/4385 useless extension candidates. Maximal degree in co-relation 60905. Up to 2411 conditions per place. [2023-08-24 13:45:29,799 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 315 selfloop transitions, 232 changer transitions 1/548 dead transitions. [2023-08-24 13:45:29,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 548 transitions, 15517 flow [2023-08-24 13:45:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 13:45:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 13:45:29,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3571 transitions. [2023-08-24 13:45:29,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34845823575331775 [2023-08-24 13:45:29,802 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3571 transitions. [2023-08-24 13:45:29,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3571 transitions. [2023-08-24 13:45:29,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:29,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3571 transitions. [2023-08-24 13:45:29,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 170.04761904761904) internal successors, (3571), 21 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:29,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 488.0) internal successors, (10736), 22 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:29,810 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 488.0) internal successors, (10736), 22 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:29,810 INFO L175 Difference]: Start difference. First operand has 329 places, 452 transitions, 12283 flow. Second operand 21 states and 3571 transitions. [2023-08-24 13:45:29,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 548 transitions, 15517 flow [2023-08-24 13:45:30,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 548 transitions, 15379 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-24 13:45:30,630 INFO L231 Difference]: Finished difference. Result has 347 places, 463 transitions, 13168 flow [2023-08-24 13:45:30,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=12145, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13168, PETRI_PLACES=347, PETRI_TRANSITIONS=463} [2023-08-24 13:45:30,634 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 324 predicate places. [2023-08-24 13:45:30,634 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 463 transitions, 13168 flow [2023-08-24 13:45:30,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.04761904761904) internal successors, (3508), 21 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:30,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:30,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:30,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:30,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-24 13:45:30,842 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:30,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:30,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1393353423, now seen corresponding path program 35 times [2023-08-24 13:45:30,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:30,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665609635] [2023-08-24 13:45:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:30,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665609635] [2023-08-24 13:45:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665609635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894688219] [2023-08-24 13:45:31,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:45:31,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:31,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:31,348 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:31,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 13:45:31,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:45:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:31,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 13:45:31,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:31,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:31,732 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 46 treesize of output 34 [2023-08-24 13:45:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:31,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:31,900 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:45:31,900 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 20 treesize of output 4 [2023-08-24 13:45:31,936 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:45:31,936 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 40 treesize of output 56 [2023-08-24 13:45:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:31,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894688219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:31,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:31,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-24 13:45:31,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539456340] [2023-08-24 13:45:31,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:31,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 13:45:31,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 13:45:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-24 13:45:31,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:31,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 463 transitions, 13168 flow. Second operand has 24 states, 24 states have (on average 167.29166666666666) internal successors, (4015), 24 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:31,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:31,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:31,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:34,049 INFO L124 PetriNetUnfolderBase]: 2409/4369 cut-off events. [2023-08-24 13:45:34,049 INFO L125 PetriNetUnfolderBase]: For 273331/273331 co-relation queries the response was YES. [2023-08-24 13:45:34,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62837 conditions, 4369 events. 2409/4369 cut-off events. For 273331/273331 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 30546 event pairs, 575 based on Foata normal form. 8/4377 useless extension candidates. Maximal degree in co-relation 62649. Up to 2673 conditions per place. [2023-08-24 13:45:34,118 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 284 selfloop transitions, 225 changer transitions 8/517 dead transitions. [2023-08-24 13:45:34,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 517 transitions, 14973 flow [2023-08-24 13:45:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:45:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:45:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2729 transitions. [2023-08-24 13:45:34,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3495133196721312 [2023-08-24 13:45:34,121 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2729 transitions. [2023-08-24 13:45:34,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2729 transitions. [2023-08-24 13:45:34,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:34,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2729 transitions. [2023-08-24 13:45:34,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.5625) internal successors, (2729), 16 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:34,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:34,126 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:34,126 INFO L175 Difference]: Start difference. First operand has 347 places, 463 transitions, 13168 flow. Second operand 16 states and 2729 transitions. [2023-08-24 13:45:34,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 517 transitions, 14973 flow [2023-08-24 13:45:35,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 517 transitions, 14741 flow, removed 60 selfloop flow, removed 10 redundant places. [2023-08-24 13:45:35,082 INFO L231 Difference]: Finished difference. Result has 352 places, 461 transitions, 13358 flow [2023-08-24 13:45:35,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=12922, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13358, PETRI_PLACES=352, PETRI_TRANSITIONS=461} [2023-08-24 13:45:35,083 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 329 predicate places. [2023-08-24 13:45:35,083 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 461 transitions, 13358 flow [2023-08-24 13:45:35,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 167.29166666666666) internal successors, (4015), 24 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:35,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:35,084 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:35,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-24 13:45:35,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-24 13:45:35,284 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:35,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1533574093, now seen corresponding path program 36 times [2023-08-24 13:45:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:35,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947211322] [2023-08-24 13:45:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947211322] [2023-08-24 13:45:35,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947211322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:35,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443609068] [2023-08-24 13:45:35,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:45:35,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:35,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:35,770 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:35,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 13:45:36,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:45:36,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:36,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:45:36,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:36,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:36,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-24 13:45:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:36,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:36,467 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:45:36,467 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 40 treesize of output 56 [2023-08-24 13:45:36,482 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:45:36,483 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 20 treesize of output 4 [2023-08-24 13:45:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:36,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443609068] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:36,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:45:36,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033959131] [2023-08-24 13:45:36,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:36,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:45:36,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:45:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:45:36,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:36,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 461 transitions, 13358 flow. Second operand has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:36,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:36,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:36,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:38,498 INFO L124 PetriNetUnfolderBase]: 2409/4347 cut-off events. [2023-08-24 13:45:38,499 INFO L125 PetriNetUnfolderBase]: For 276968/276968 co-relation queries the response was YES. [2023-08-24 13:45:38,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63816 conditions, 4347 events. 2409/4347 cut-off events. For 276968/276968 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 30110 event pairs, 548 based on Foata normal form. 8/4355 useless extension candidates. Maximal degree in co-relation 63627. Up to 2467 conditions per place. [2023-08-24 13:45:38,565 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 289 selfloop transitions, 228 changer transitions 1/518 dead transitions. [2023-08-24 13:45:38,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 518 transitions, 15614 flow [2023-08-24 13:45:38,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:45:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:45:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2719 transitions. [2023-08-24 13:45:38,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34823258196721313 [2023-08-24 13:45:38,567 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2719 transitions. [2023-08-24 13:45:38,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2719 transitions. [2023-08-24 13:45:38,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:38,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2719 transitions. [2023-08-24 13:45:38,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 169.9375) internal successors, (2719), 16 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:38,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:38,574 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:38,574 INFO L175 Difference]: Start difference. First operand has 352 places, 461 transitions, 13358 flow. Second operand 16 states and 2719 transitions. [2023-08-24 13:45:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 518 transitions, 15614 flow [2023-08-24 13:45:39,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 518 transitions, 15254 flow, removed 20 selfloop flow, removed 12 redundant places. [2023-08-24 13:45:39,569 INFO L231 Difference]: Finished difference. Result has 356 places, 465 transitions, 13674 flow [2023-08-24 13:45:39,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=12984, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=13674, PETRI_PLACES=356, PETRI_TRANSITIONS=465} [2023-08-24 13:45:39,570 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 333 predicate places. [2023-08-24 13:45:39,570 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 465 transitions, 13674 flow [2023-08-24 13:45:39,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:39,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:39,571 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:39,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:39,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-24 13:45:39,777 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:39,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1099116243, now seen corresponding path program 37 times [2023-08-24 13:45:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:39,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869144961] [2023-08-24 13:45:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:39,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:40,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869144961] [2023-08-24 13:45:40,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869144961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:40,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399908977] [2023-08-24 13:45:40,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:45:40,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:40,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:40,205 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:40,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 13:45:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:40,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:45:40,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:40,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:40,720 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:45:40,720 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 82 treesize of output 99 [2023-08-24 13:45:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399908977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:40,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:40,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:45:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595602246] [2023-08-24 13:45:40,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:45:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:45:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:45:40,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:40,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 465 transitions, 13674 flow. Second operand has 19 states, 19 states have (on average 167.1578947368421) internal successors, (3176), 19 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:40,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:40,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:40,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:42,520 INFO L124 PetriNetUnfolderBase]: 2473/4435 cut-off events. [2023-08-24 13:45:42,520 INFO L125 PetriNetUnfolderBase]: For 294593/294593 co-relation queries the response was YES. [2023-08-24 13:45:42,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66637 conditions, 4435 events. 2473/4435 cut-off events. For 294593/294593 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 30680 event pairs, 518 based on Foata normal form. 8/4443 useless extension candidates. Maximal degree in co-relation 66447. Up to 2473 conditions per place. [2023-08-24 13:45:42,587 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 302 selfloop transitions, 238 changer transitions 1/541 dead transitions. [2023-08-24 13:45:42,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 541 transitions, 16505 flow [2023-08-24 13:45:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:45:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:45:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2720 transitions. [2023-08-24 13:45:42,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483606557377049 [2023-08-24 13:45:42,590 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2720 transitions. [2023-08-24 13:45:42,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2720 transitions. [2023-08-24 13:45:42,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:42,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2720 transitions. [2023-08-24 13:45:42,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.0) internal successors, (2720), 16 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:42,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:42,597 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:42,597 INFO L175 Difference]: Start difference. First operand has 356 places, 465 transitions, 13674 flow. Second operand 16 states and 2720 transitions. [2023-08-24 13:45:42,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 541 transitions, 16505 flow [2023-08-24 13:45:43,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 541 transitions, 16091 flow, removed 26 selfloop flow, removed 12 redundant places. [2023-08-24 13:45:43,599 INFO L231 Difference]: Finished difference. Result has 359 places, 474 transitions, 14357 flow [2023-08-24 13:45:43,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=13219, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=14357, PETRI_PLACES=359, PETRI_TRANSITIONS=474} [2023-08-24 13:45:43,600 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 336 predicate places. [2023-08-24 13:45:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 474 transitions, 14357 flow [2023-08-24 13:45:43,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.1578947368421) internal successors, (3176), 19 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:43,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:43,601 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:43,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:43,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-24 13:45:43,801 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:43,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:43,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1534705953, now seen corresponding path program 38 times [2023-08-24 13:45:43,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:43,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848348176] [2023-08-24 13:45:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:43,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:44,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848348176] [2023-08-24 13:45:44,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848348176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:44,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643383829] [2023-08-24 13:45:44,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:45:44,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:44,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:44,306 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:44,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 13:45:44,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:45:44,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:44,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:45:44,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:44,700 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:45:44,700 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 46 treesize of output 26 [2023-08-24 13:45:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:44,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:44,940 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:45:44,940 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 40 treesize of output 56 [2023-08-24 13:45:44,954 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:45:44,954 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 20 treesize of output 4 [2023-08-24 13:45:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:44,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643383829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:44,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:44,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-24 13:45:44,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772788771] [2023-08-24 13:45:44,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:44,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:45:44,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:44,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:45:44,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:45:44,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:45:44,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 474 transitions, 14357 flow. Second operand has 22 states, 22 states have (on average 164.22727272727272) internal successors, (3613), 22 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:44,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:44,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:45:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:46,618 INFO L124 PetriNetUnfolderBase]: 2453/4395 cut-off events. [2023-08-24 13:45:46,619 INFO L125 PetriNetUnfolderBase]: For 296055/296055 co-relation queries the response was YES. [2023-08-24 13:45:46,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66548 conditions, 4395 events. 2453/4395 cut-off events. For 296055/296055 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 30301 event pairs, 322 based on Foata normal form. 8/4403 useless extension candidates. Maximal degree in co-relation 66357. Up to 3134 conditions per place. [2023-08-24 13:45:46,678 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 237 selfloop transitions, 258 changer transitions 12/507 dead transitions. [2023-08-24 13:45:46,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 507 transitions, 15739 flow [2023-08-24 13:45:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:45:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:45:46,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2013 transitions. [2023-08-24 13:45:46,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34375 [2023-08-24 13:45:46,679 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2013 transitions. [2023-08-24 13:45:46,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2013 transitions. [2023-08-24 13:45:46,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:46,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2013 transitions. [2023-08-24 13:45:46,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 167.75) internal successors, (2013), 12 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:46,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:46,684 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:46,684 INFO L175 Difference]: Start difference. First operand has 359 places, 474 transitions, 14357 flow. Second operand 12 states and 2013 transitions. [2023-08-24 13:45:46,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 507 transitions, 15739 flow [2023-08-24 13:45:47,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 507 transitions, 15587 flow, removed 15 selfloop flow, removed 11 redundant places. [2023-08-24 13:45:47,665 INFO L231 Difference]: Finished difference. Result has 359 places, 470 transitions, 14658 flow [2023-08-24 13:45:47,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=14194, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14658, PETRI_PLACES=359, PETRI_TRANSITIONS=470} [2023-08-24 13:45:47,666 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 336 predicate places. [2023-08-24 13:45:47,666 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 470 transitions, 14658 flow [2023-08-24 13:45:47,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 164.22727272727272) internal successors, (3613), 22 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:47,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:47,667 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:47,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:47,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:47,867 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:47,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:47,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1666419289, now seen corresponding path program 39 times [2023-08-24 13:45:47,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:47,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138359357] [2023-08-24 13:45:47,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:47,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:48,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138359357] [2023-08-24 13:45:48,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138359357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:48,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25936351] [2023-08-24 13:45:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:45:48,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:48,379 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:48,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 13:45:48,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:45:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:48,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 13:45:48,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:48,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:45:48,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:45:48,863 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:45:48,864 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 59 treesize of output 31 [2023-08-24 13:45:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:48,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:49,131 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3115 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3115))) (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset)))))) (forall ((v_ArrVal_3115 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3115))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)))))))) is different from false [2023-08-24 13:45:49,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:49,163 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 116 treesize of output 144 [2023-08-24 13:45:49,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:49,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:45:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:49,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25936351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:49,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:49,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-24 13:45:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858957260] [2023-08-24 13:45:49,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:49,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 13:45:49,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:49,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 13:45:49,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=761, Unknown=1, NotChecked=56, Total=930 [2023-08-24 13:45:49,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 488 [2023-08-24 13:45:49,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 470 transitions, 14658 flow. Second operand has 31 states, 31 states have (on average 159.80645161290323) internal successors, (4954), 31 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:49,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:49,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 488 [2023-08-24 13:45:49,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:51,641 INFO L124 PetriNetUnfolderBase]: 2449/4391 cut-off events. [2023-08-24 13:45:51,642 INFO L125 PetriNetUnfolderBase]: For 305236/305236 co-relation queries the response was YES. [2023-08-24 13:45:51,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67733 conditions, 4391 events. 2449/4391 cut-off events. For 305236/305236 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 30262 event pairs, 268 based on Foata normal form. 8/4399 useless extension candidates. Maximal degree in co-relation 67541. Up to 1724 conditions per place. [2023-08-24 13:45:51,737 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 328 selfloop transitions, 189 changer transitions 19/536 dead transitions. [2023-08-24 13:45:51,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 536 transitions, 16977 flow [2023-08-24 13:45:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:45:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:45:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2135 transitions. [2023-08-24 13:45:51,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33653846153846156 [2023-08-24 13:45:51,739 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2135 transitions. [2023-08-24 13:45:51,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2135 transitions. [2023-08-24 13:45:51,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:51,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2135 transitions. [2023-08-24 13:45:51,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 164.23076923076923) internal successors, (2135), 13 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:51,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:51,743 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:51,744 INFO L175 Difference]: Start difference. First operand has 359 places, 470 transitions, 14658 flow. Second operand 13 states and 2135 transitions. [2023-08-24 13:45:51,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 536 transitions, 16977 flow [2023-08-24 13:45:52,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 536 transitions, 16773 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-08-24 13:45:52,743 INFO L231 Difference]: Finished difference. Result has 361 places, 472 transitions, 15181 flow [2023-08-24 13:45:52,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=14458, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15181, PETRI_PLACES=361, PETRI_TRANSITIONS=472} [2023-08-24 13:45:52,744 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 338 predicate places. [2023-08-24 13:45:52,744 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 472 transitions, 15181 flow [2023-08-24 13:45:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 159.80645161290323) internal successors, (4954), 31 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:52,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:52,745 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:52,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:52,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 13:45:52,945 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:52,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash -491218827, now seen corresponding path program 40 times [2023-08-24 13:45:52,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:52,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009703282] [2023-08-24 13:45:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:52,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:53,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009703282] [2023-08-24 13:45:53,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009703282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495383531] [2023-08-24 13:45:53,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:45:53,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:53,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:53,347 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:53,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 13:45:53,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:45:53,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:53,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:45:53,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:53,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:53,815 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:45:53,815 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 62 treesize of output 62 [2023-08-24 13:45:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495383531] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:53,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-24 13:45:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674585243] [2023-08-24 13:45:53,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:53,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 13:45:53,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 13:45:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-24 13:45:53,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:45:53,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 472 transitions, 15181 flow. Second operand has 18 states, 18 states have (on average 167.22222222222223) internal successors, (3010), 18 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:53,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:45:53,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:45:55,418 INFO L124 PetriNetUnfolderBase]: 2509/4479 cut-off events. [2023-08-24 13:45:55,418 INFO L125 PetriNetUnfolderBase]: For 337806/337806 co-relation queries the response was YES. [2023-08-24 13:45:55,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71884 conditions, 4479 events. 2509/4479 cut-off events. For 337806/337806 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 30875 event pairs, 64 based on Foata normal form. 8/4487 useless extension candidates. Maximal degree in co-relation 71687. Up to 1613 conditions per place. [2023-08-24 13:45:55,492 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 167 selfloop transitions, 410 changer transitions 2/579 dead transitions. [2023-08-24 13:45:55,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 579 transitions, 19193 flow [2023-08-24 13:45:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:45:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:45:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2218 transitions. [2023-08-24 13:45:55,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496216897856242 [2023-08-24 13:45:55,494 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2218 transitions. [2023-08-24 13:45:55,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2218 transitions. [2023-08-24 13:45:55,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:45:55,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2218 transitions. [2023-08-24 13:45:55,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 170.6153846153846) internal successors, (2218), 13 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:55,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:55,501 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:55,501 INFO L175 Difference]: Start difference. First operand has 361 places, 472 transitions, 15181 flow. Second operand 13 states and 2218 transitions. [2023-08-24 13:45:55,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 579 transitions, 19193 flow [2023-08-24 13:45:56,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 579 transitions, 18935 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-24 13:45:56,843 INFO L231 Difference]: Finished difference. Result has 362 places, 513 transitions, 17471 flow [2023-08-24 13:45:56,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=14959, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=17471, PETRI_PLACES=362, PETRI_TRANSITIONS=513} [2023-08-24 13:45:56,844 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 339 predicate places. [2023-08-24 13:45:56,844 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 513 transitions, 17471 flow [2023-08-24 13:45:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 167.22222222222223) internal successors, (3010), 18 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:56,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:45:56,845 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:45:56,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 13:45:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 13:45:57,051 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:45:57,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:45:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -617376793, now seen corresponding path program 41 times [2023-08-24 13:45:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:45:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823326379] [2023-08-24 13:45:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:45:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:45:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:45:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:57,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:45:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823326379] [2023-08-24 13:45:57,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823326379] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:45:57,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713966278] [2023-08-24 13:45:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:45:57,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:45:57,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:45:57,693 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:45:57,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 13:45:58,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:45:58,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:45:58,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:45:58,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:45:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:45:58,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:45:58,310 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:45:58,311 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 60 treesize of output 32 [2023-08-24 13:45:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:58,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:45:58,493 WARN L839 $PredicateComparison]: unable to prove that (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3256 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3256))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset)))))) (forall ((v_ArrVal_3256 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3256))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-08-24 13:45:58,524 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:58,524 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 116 treesize of output 144 [2023-08-24 13:45:58,543 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:45:58,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:45:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:45:58,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713966278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:45:58,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:45:58,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 13:45:58,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937496497] [2023-08-24 13:45:58,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:45:58,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 13:45:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:45:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 13:45:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=656, Unknown=1, NotChecked=52, Total=812 [2023-08-24 13:45:58,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 488 [2023-08-24 13:45:58,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 513 transitions, 17471 flow. Second operand has 29 states, 29 states have (on average 162.89655172413794) internal successors, (4724), 29 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:45:58,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:45:58,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 488 [2023-08-24 13:45:58,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:01,089 INFO L124 PetriNetUnfolderBase]: 2513/4501 cut-off events. [2023-08-24 13:46:01,089 INFO L125 PetriNetUnfolderBase]: For 347442/347442 co-relation queries the response was YES. [2023-08-24 13:46:01,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73184 conditions, 4501 events. 2513/4501 cut-off events. For 347442/347442 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 31092 event pairs, 332 based on Foata normal form. 8/4509 useless extension candidates. Maximal degree in co-relation 72989. Up to 1617 conditions per place. [2023-08-24 13:46:01,155 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 216 selfloop transitions, 345 changer transitions 12/573 dead transitions. [2023-08-24 13:46:01,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 573 transitions, 19707 flow [2023-08-24 13:46:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:46:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:46:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2507 transitions. [2023-08-24 13:46:01,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424863387978142 [2023-08-24 13:46:01,158 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2507 transitions. [2023-08-24 13:46:01,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2507 transitions. [2023-08-24 13:46:01,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:01,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2507 transitions. [2023-08-24 13:46:01,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.13333333333333) internal successors, (2507), 15 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:01,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:01,163 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:01,163 INFO L175 Difference]: Start difference. First operand has 362 places, 513 transitions, 17471 flow. Second operand 15 states and 2507 transitions. [2023-08-24 13:46:01,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 573 transitions, 19707 flow [2023-08-24 13:46:02,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 573 transitions, 19026 flow, removed 141 selfloop flow, removed 16 redundant places. [2023-08-24 13:46:02,421 INFO L231 Difference]: Finished difference. Result has 363 places, 516 transitions, 17816 flow [2023-08-24 13:46:02,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=16805, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17816, PETRI_PLACES=363, PETRI_TRANSITIONS=516} [2023-08-24 13:46:02,422 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 340 predicate places. [2023-08-24 13:46:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 516 transitions, 17816 flow [2023-08-24 13:46:02,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 162.89655172413794) internal successors, (4724), 29 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:02,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:02,423 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:02,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:02,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 13:46:02,626 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:02,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1002050255, now seen corresponding path program 42 times [2023-08-24 13:46:02,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:02,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332103136] [2023-08-24 13:46:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:02,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332103136] [2023-08-24 13:46:03,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332103136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338548795] [2023-08-24 13:46:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:46:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:03,172 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:03,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 13:46:03,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:46:03,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:03,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-24 13:46:03,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:03,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:03,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:03,741 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:46:03,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-08-24 13:46:03,824 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:46:03,824 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 26 treesize of output 14 [2023-08-24 13:46:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:03,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:04,005 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3327 (Array Int Int))) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3327))) (= (select (select .cse0 c_~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) is different from false [2023-08-24 13:46:04,120 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:04,120 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 94 treesize of output 130 [2023-08-24 13:46:04,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:04,138 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:46:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:04,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338548795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:04,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:04,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 33 [2023-08-24 13:46:04,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352356914] [2023-08-24 13:46:04,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:04,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 13:46:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:04,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 13:46:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=928, Unknown=1, NotChecked=62, Total=1122 [2023-08-24 13:46:04,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 488 [2023-08-24 13:46:04,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 516 transitions, 17816 flow. Second operand has 34 states, 34 states have (on average 155.73529411764707) internal successors, (5295), 34 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:04,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:04,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 488 [2023-08-24 13:46:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:06,561 INFO L124 PetriNetUnfolderBase]: 2557/4613 cut-off events. [2023-08-24 13:46:06,561 INFO L125 PetriNetUnfolderBase]: For 357562/357562 co-relation queries the response was YES. [2023-08-24 13:46:06,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74248 conditions, 4613 events. 2557/4613 cut-off events. For 357562/357562 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 32321 event pairs, 260 based on Foata normal form. 16/4629 useless extension candidates. Maximal degree in co-relation 74061. Up to 1994 conditions per place. [2023-08-24 13:46:06,631 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 343 selfloop transitions, 233 changer transitions 30/606 dead transitions. [2023-08-24 13:46:06,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 606 transitions, 20735 flow [2023-08-24 13:46:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:46:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:46:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1928 transitions. [2023-08-24 13:46:06,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292349726775956 [2023-08-24 13:46:06,633 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1928 transitions. [2023-08-24 13:46:06,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1928 transitions. [2023-08-24 13:46:06,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:06,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1928 transitions. [2023-08-24 13:46:06,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 160.66666666666666) internal successors, (1928), 12 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:06,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:06,637 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:06,637 INFO L175 Difference]: Start difference. First operand has 363 places, 516 transitions, 17816 flow. Second operand 12 states and 1928 transitions. [2023-08-24 13:46:06,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 606 transitions, 20735 flow [2023-08-24 13:46:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 606 transitions, 20215 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-24 13:46:07,809 INFO L231 Difference]: Finished difference. Result has 367 places, 537 transitions, 18738 flow [2023-08-24 13:46:07,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=17324, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18738, PETRI_PLACES=367, PETRI_TRANSITIONS=537} [2023-08-24 13:46:07,810 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 344 predicate places. [2023-08-24 13:46:07,810 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 537 transitions, 18738 flow [2023-08-24 13:46:07,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 155.73529411764707) internal successors, (5295), 34 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:07,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:07,810 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:07,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:08,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:08,011 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:08,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1392297375, now seen corresponding path program 43 times [2023-08-24 13:46:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:08,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175078333] [2023-08-24 13:46:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:08,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:08,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:08,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175078333] [2023-08-24 13:46:08,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175078333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:08,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446958597] [2023-08-24 13:46:08,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:46:08,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:08,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:08,897 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:08,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 13:46:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:09,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 13:46:09,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:09,409 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:46:09,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 13:46:09,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:09,552 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 46 treesize of output 30 [2023-08-24 13:46:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:09,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:09,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:09,862 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 94 treesize of output 130 [2023-08-24 13:46:09,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:09,871 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:46:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:10,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446958597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:10,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:10,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2023-08-24 13:46:10,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407886434] [2023-08-24 13:46:10,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:10,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:46:10,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:46:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=866, Unknown=2, NotChecked=0, Total=992 [2023-08-24 13:46:10,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 488 [2023-08-24 13:46:10,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 537 transitions, 18738 flow. Second operand has 32 states, 32 states have (on average 155.6875) internal successors, (4982), 32 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:10,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:10,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 488 [2023-08-24 13:46:10,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:13,580 INFO L124 PetriNetUnfolderBase]: 2511/4539 cut-off events. [2023-08-24 13:46:13,580 INFO L125 PetriNetUnfolderBase]: For 396414/396414 co-relation queries the response was YES. [2023-08-24 13:46:13,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78075 conditions, 4539 events. 2511/4539 cut-off events. For 396414/396414 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 31768 event pairs, 150 based on Foata normal form. 60/4599 useless extension candidates. Maximal degree in co-relation 77885. Up to 1825 conditions per place. [2023-08-24 13:46:13,651 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 289 selfloop transitions, 349 changer transitions 12/650 dead transitions. [2023-08-24 13:46:13,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 650 transitions, 22282 flow [2023-08-24 13:46:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 13:46:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 13:46:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3360 transitions. [2023-08-24 13:46:13,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32786885245901637 [2023-08-24 13:46:13,654 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3360 transitions. [2023-08-24 13:46:13,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3360 transitions. [2023-08-24 13:46:13,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:13,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3360 transitions. [2023-08-24 13:46:13,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.0) internal successors, (3360), 21 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:13,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 488.0) internal successors, (10736), 22 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:13,665 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 488.0) internal successors, (10736), 22 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:13,666 INFO L175 Difference]: Start difference. First operand has 367 places, 537 transitions, 18738 flow. Second operand 21 states and 3360 transitions. [2023-08-24 13:46:13,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 650 transitions, 22282 flow [2023-08-24 13:46:15,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 650 transitions, 21827 flow, removed 91 selfloop flow, removed 8 redundant places. [2023-08-24 13:46:15,104 INFO L231 Difference]: Finished difference. Result has 381 places, 553 transitions, 19948 flow [2023-08-24 13:46:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=18017, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19948, PETRI_PLACES=381, PETRI_TRANSITIONS=553} [2023-08-24 13:46:15,105 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 358 predicate places. [2023-08-24 13:46:15,105 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 553 transitions, 19948 flow [2023-08-24 13:46:15,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 155.6875) internal successors, (4982), 32 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:15,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:15,106 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:15,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:15,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:15,306 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:15,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1069238593, now seen corresponding path program 44 times [2023-08-24 13:46:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086896837] [2023-08-24 13:46:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:15,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086896837] [2023-08-24 13:46:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086896837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185007040] [2023-08-24 13:46:15,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:46:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:15,922 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 13:46:16,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:46:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:16,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 13:46:16,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:16,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:46:16,394 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:16,395 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 59 treesize of output 35 [2023-08-24 13:46:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:16,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:16,885 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3469 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3469))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3469 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3469))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2023-08-24 13:46:16,894 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:16,895 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 70 treesize of output 66 [2023-08-24 13:46:16,901 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:16,902 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:46:16,939 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:16,940 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 116 treesize of output 144 [2023-08-24 13:46:16,968 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:16,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:46:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:17,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185007040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:17,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:17,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2023-08-24 13:46:17,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225240090] [2023-08-24 13:46:17,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:17,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 13:46:17,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 13:46:17,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=758, Unknown=1, NotChecked=56, Total=930 [2023-08-24 13:46:17,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 488 [2023-08-24 13:46:17,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 553 transitions, 19948 flow. Second operand has 31 states, 31 states have (on average 159.7741935483871) internal successors, (4953), 31 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:17,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:17,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 488 [2023-08-24 13:46:17,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:21,092 INFO L124 PetriNetUnfolderBase]: 2641/4805 cut-off events. [2023-08-24 13:46:21,092 INFO L125 PetriNetUnfolderBase]: For 467708/467708 co-relation queries the response was YES. [2023-08-24 13:46:21,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86378 conditions, 4805 events. 2641/4805 cut-off events. For 467708/467708 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 34206 event pairs, 184 based on Foata normal form. 34/4839 useless extension candidates. Maximal degree in co-relation 86185. Up to 2554 conditions per place. [2023-08-24 13:46:21,171 INFO L140 encePairwiseOnDemand]: 475/488 looper letters, 325 selfloop transitions, 331 changer transitions 6/662 dead transitions. [2023-08-24 13:46:21,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 662 transitions, 23769 flow [2023-08-24 13:46:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 13:46:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 13:46:21,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4253 transitions. [2023-08-24 13:46:21,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33519861286254726 [2023-08-24 13:46:21,174 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4253 transitions. [2023-08-24 13:46:21,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4253 transitions. [2023-08-24 13:46:21,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:21,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4253 transitions. [2023-08-24 13:46:21,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 163.57692307692307) internal successors, (4253), 26 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:21,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 488.0) internal successors, (13176), 27 states have internal predecessors, (13176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:21,182 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 488.0) internal successors, (13176), 27 states have internal predecessors, (13176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:21,182 INFO L175 Difference]: Start difference. First operand has 381 places, 553 transitions, 19948 flow. Second operand 26 states and 4253 transitions. [2023-08-24 13:46:21,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 662 transitions, 23769 flow [2023-08-24 13:46:23,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 662 transitions, 22607 flow, removed 153 selfloop flow, removed 12 redundant places. [2023-08-24 13:46:23,279 INFO L231 Difference]: Finished difference. Result has 403 places, 573 transitions, 20949 flow [2023-08-24 13:46:23,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=18748, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20949, PETRI_PLACES=403, PETRI_TRANSITIONS=573} [2023-08-24 13:46:23,280 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2023-08-24 13:46:23,280 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 573 transitions, 20949 flow [2023-08-24 13:46:23,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 159.7741935483871) internal successors, (4953), 31 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:23,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:23,280 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:23,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:23,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:23,481 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:23,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1070740601, now seen corresponding path program 45 times [2023-08-24 13:46:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:23,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945148351] [2023-08-24 13:46:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:23,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:24,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945148351] [2023-08-24 13:46:24,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945148351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:24,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016946667] [2023-08-24 13:46:24,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:46:24,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:24,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:24,138 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:24,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 13:46:24,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:46:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:24,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-24 13:46:24,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:24,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:24,634 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:46:24,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 13:46:24,789 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:46:24,789 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 59 treesize of output 31 [2023-08-24 13:46:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:24,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:25,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:25,097 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 94 treesize of output 130 [2023-08-24 13:46:25,106 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:25,106 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:46:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:25,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016946667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:25,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:25,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 31 [2023-08-24 13:46:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874493288] [2023-08-24 13:46:25,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:25,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:46:25,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:46:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=873, Unknown=2, NotChecked=0, Total=992 [2023-08-24 13:46:25,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 488 [2023-08-24 13:46:25,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 573 transitions, 20949 flow. Second operand has 32 states, 32 states have (on average 155.78125) internal successors, (4985), 32 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:25,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:25,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 488 [2023-08-24 13:46:25,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:28,197 INFO L124 PetriNetUnfolderBase]: 2635/4795 cut-off events. [2023-08-24 13:46:28,197 INFO L125 PetriNetUnfolderBase]: For 464769/464769 co-relation queries the response was YES. [2023-08-24 13:46:28,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87488 conditions, 4795 events. 2635/4795 cut-off events. For 464769/464769 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 33992 event pairs, 136 based on Foata normal form. 8/4803 useless extension candidates. Maximal degree in co-relation 87289. Up to 1967 conditions per place. [2023-08-24 13:46:28,273 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 216 selfloop transitions, 405 changer transitions 18/639 dead transitions. [2023-08-24 13:46:28,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 639 transitions, 23628 flow [2023-08-24 13:46:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:46:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:46:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2401 transitions. [2023-08-24 13:46:28,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3280054644808743 [2023-08-24 13:46:28,275 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2401 transitions. [2023-08-24 13:46:28,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2401 transitions. [2023-08-24 13:46:28,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:28,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2401 transitions. [2023-08-24 13:46:28,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 160.06666666666666) internal successors, (2401), 15 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:28,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:28,280 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:28,280 INFO L175 Difference]: Start difference. First operand has 403 places, 573 transitions, 20949 flow. Second operand 15 states and 2401 transitions. [2023-08-24 13:46:28,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 639 transitions, 23628 flow [2023-08-24 13:46:30,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 639 transitions, 22885 flow, removed 242 selfloop flow, removed 15 redundant places. [2023-08-24 13:46:30,216 INFO L231 Difference]: Finished difference. Result has 403 places, 570 transitions, 21135 flow [2023-08-24 13:46:30,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=20344, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=21135, PETRI_PLACES=403, PETRI_TRANSITIONS=570} [2023-08-24 13:46:30,217 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 380 predicate places. [2023-08-24 13:46:30,217 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 570 transitions, 21135 flow [2023-08-24 13:46:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 155.78125) internal successors, (4985), 32 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:30,218 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:30,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:30,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-24 13:46:30,418 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:30,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash 857238319, now seen corresponding path program 46 times [2023-08-24 13:46:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:30,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601626590] [2023-08-24 13:46:30,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:30,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:31,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:31,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601626590] [2023-08-24 13:46:31,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601626590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:31,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029015079] [2023-08-24 13:46:31,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:46:31,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:31,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:31,098 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:31,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 13:46:31,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:46:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:31,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-24 13:46:31,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:31,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:31,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:31,588 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:46:31,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2023-08-24 13:46:31,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:31,706 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 65 treesize of output 41 [2023-08-24 13:46:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:31,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:32,011 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:32,011 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 94 treesize of output 130 [2023-08-24 13:46:32,020 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:32,020 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:46:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:32,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029015079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:32,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:32,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 13:46:32,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208420752] [2023-08-24 13:46:32,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:32,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:46:32,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:46:32,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=877, Unknown=2, NotChecked=0, Total=992 [2023-08-24 13:46:32,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 488 [2023-08-24 13:46:32,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 570 transitions, 21135 flow. Second operand has 32 states, 32 states have (on average 154.78125) internal successors, (4953), 32 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:32,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:32,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 488 [2023-08-24 13:46:32,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:35,867 INFO L124 PetriNetUnfolderBase]: 2581/4683 cut-off events. [2023-08-24 13:46:35,867 INFO L125 PetriNetUnfolderBase]: For 457896/457896 co-relation queries the response was YES. [2023-08-24 13:46:35,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85667 conditions, 4683 events. 2581/4683 cut-off events. For 457896/457896 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 32984 event pairs, 156 based on Foata normal form. 20/4703 useless extension candidates. Maximal degree in co-relation 85554. Up to 1879 conditions per place. [2023-08-24 13:46:35,949 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 273 selfloop transitions, 354 changer transitions 12/639 dead transitions. [2023-08-24 13:46:35,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 639 transitions, 23715 flow [2023-08-24 13:46:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 13:46:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 13:46:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3164 transitions. [2023-08-24 13:46:35,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3241803278688525 [2023-08-24 13:46:35,951 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3164 transitions. [2023-08-24 13:46:35,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3164 transitions. [2023-08-24 13:46:35,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:35,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3164 transitions. [2023-08-24 13:46:35,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 158.2) internal successors, (3164), 20 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:35,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 488.0) internal successors, (10248), 21 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:35,958 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 488.0) internal successors, (10248), 21 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:35,958 INFO L175 Difference]: Start difference. First operand has 403 places, 570 transitions, 21135 flow. Second operand 20 states and 3164 transitions. [2023-08-24 13:46:35,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 639 transitions, 23715 flow [2023-08-24 13:46:37,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 639 transitions, 23142 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-24 13:46:37,799 INFO L231 Difference]: Finished difference. Result has 410 places, 568 transitions, 21279 flow [2023-08-24 13:46:37,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=20498, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21279, PETRI_PLACES=410, PETRI_TRANSITIONS=568} [2023-08-24 13:46:37,800 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 387 predicate places. [2023-08-24 13:46:37,800 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 568 transitions, 21279 flow [2023-08-24 13:46:37,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 154.78125) internal successors, (4953), 32 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:37,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:37,801 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:37,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:38,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-24 13:46:38,007 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:38,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1584407735, now seen corresponding path program 47 times [2023-08-24 13:46:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:38,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753995829] [2023-08-24 13:46:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:38,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:38,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753995829] [2023-08-24 13:46:38,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753995829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:38,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536468119] [2023-08-24 13:46:38,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:46:38,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:38,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:38,521 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:38,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 13:46:38,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:46:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:38,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 13:46:38,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:38,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:46:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:39,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:39,254 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3682 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3682))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|))))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| 4) (forall ((v_ArrVal_3682 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3682))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))))) is different from false [2023-08-24 13:46:39,263 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:39,263 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 70 treesize of output 66 [2023-08-24 13:46:39,270 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:39,270 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:46:39,302 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:39,302 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 116 treesize of output 144 [2023-08-24 13:46:39,320 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:39,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:46:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:39,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536468119] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:39,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:39,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2023-08-24 13:46:39,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356947058] [2023-08-24 13:46:39,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:39,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 13:46:39,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 13:46:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=601, Unknown=1, NotChecked=50, Total=756 [2023-08-24 13:46:39,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 488 [2023-08-24 13:46:39,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 568 transitions, 21279 flow. Second operand has 28 states, 28 states have (on average 162.85714285714286) internal successors, (4560), 28 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:39,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:39,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 488 [2023-08-24 13:46:39,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:41,817 INFO L124 PetriNetUnfolderBase]: 2613/4719 cut-off events. [2023-08-24 13:46:41,817 INFO L125 PetriNetUnfolderBase]: For 472133/472133 co-relation queries the response was YES. [2023-08-24 13:46:41,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87647 conditions, 4719 events. 2613/4719 cut-off events. For 472133/472133 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 33204 event pairs, 398 based on Foata normal form. 8/4727 useless extension candidates. Maximal degree in co-relation 87534. Up to 2535 conditions per place. [2023-08-24 13:46:41,892 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 320 selfloop transitions, 283 changer transitions 1/604 dead transitions. [2023-08-24 13:46:41,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 604 transitions, 23426 flow [2023-08-24 13:46:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:46:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:46:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1828 transitions. [2023-08-24 13:46:41,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3405365126676602 [2023-08-24 13:46:41,894 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1828 transitions. [2023-08-24 13:46:41,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1828 transitions. [2023-08-24 13:46:41,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:41,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1828 transitions. [2023-08-24 13:46:41,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 166.1818181818182) internal successors, (1828), 11 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:41,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:41,897 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:41,897 INFO L175 Difference]: Start difference. First operand has 410 places, 568 transitions, 21279 flow. Second operand 11 states and 1828 transitions. [2023-08-24 13:46:41,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 604 transitions, 23426 flow [2023-08-24 13:46:43,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 604 transitions, 22959 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 13:46:43,557 INFO L231 Difference]: Finished difference. Result has 413 places, 571 transitions, 21825 flow [2023-08-24 13:46:43,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=20816, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21825, PETRI_PLACES=413, PETRI_TRANSITIONS=571} [2023-08-24 13:46:43,558 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 390 predicate places. [2023-08-24 13:46:43,558 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 571 transitions, 21825 flow [2023-08-24 13:46:43,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 162.85714285714286) internal successors, (4560), 28 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:43,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:43,558 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:43,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:43,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-24 13:46:43,759 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:43,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:43,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1202858027, now seen corresponding path program 48 times [2023-08-24 13:46:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:43,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172106502] [2023-08-24 13:46:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:44,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:44,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172106502] [2023-08-24 13:46:44,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172106502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:44,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48276505] [2023-08-24 13:46:44,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:46:44,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:44,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:44,434 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:44,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 13:46:44,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:46:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:44,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 13:46:44,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:44,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:46:44,923 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:46:44,923 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-08-24 13:46:44,931 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:46:44,931 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 25 treesize of output 9 [2023-08-24 13:46:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:45,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:45,195 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3753 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3753))) (let ((.cse0 (select .cse1 ~o_2~0.base))) (or (= (select .cse0 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|) (not (= (select .cse0 c_~o_2~0.offset) (select (select .cse1 c_~o_0~0.base) c_~o_0~0.offset))))))) (or (forall ((v_ArrVal_3753 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3753))) (= (select (select .cse2 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4))) is different from false [2023-08-24 13:46:45,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:45,226 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 116 treesize of output 144 [2023-08-24 13:46:45,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:45,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:46:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48276505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:45,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 13:46:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595604199] [2023-08-24 13:46:45,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:45,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 13:46:45,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 13:46:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=656, Unknown=1, NotChecked=52, Total=812 [2023-08-24 13:46:45,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 488 [2023-08-24 13:46:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 571 transitions, 21825 flow. Second operand has 29 states, 29 states have (on average 162.82758620689654) internal successors, (4722), 29 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 488 [2023-08-24 13:46:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:48,359 INFO L124 PetriNetUnfolderBase]: 2601/4713 cut-off events. [2023-08-24 13:46:48,360 INFO L125 PetriNetUnfolderBase]: For 500386/500386 co-relation queries the response was YES. [2023-08-24 13:46:48,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88094 conditions, 4713 events. 2601/4713 cut-off events. For 500386/500386 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 33229 event pairs, 404 based on Foata normal form. 20/4733 useless extension candidates. Maximal degree in co-relation 87980. Up to 2571 conditions per place. [2023-08-24 13:46:48,440 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 326 selfloop transitions, 287 changer transitions 8/621 dead transitions. [2023-08-24 13:46:48,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 621 transitions, 24129 flow [2023-08-24 13:46:48,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:46:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:46:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2662 transitions. [2023-08-24 13:46:48,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34093237704918034 [2023-08-24 13:46:48,442 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2662 transitions. [2023-08-24 13:46:48,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2662 transitions. [2023-08-24 13:46:48,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:48,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2662 transitions. [2023-08-24 13:46:48,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 166.375) internal successors, (2662), 16 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:48,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:48,447 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:48,447 INFO L175 Difference]: Start difference. First operand has 413 places, 571 transitions, 21825 flow. Second operand 16 states and 2662 transitions. [2023-08-24 13:46:48,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 621 transitions, 24129 flow [2023-08-24 13:46:50,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 621 transitions, 24011 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-24 13:46:50,467 INFO L231 Difference]: Finished difference. Result has 424 places, 572 transitions, 22394 flow [2023-08-24 13:46:50,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=21695, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=22394, PETRI_PLACES=424, PETRI_TRANSITIONS=572} [2023-08-24 13:46:50,468 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 401 predicate places. [2023-08-24 13:46:50,468 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 572 transitions, 22394 flow [2023-08-24 13:46:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 162.82758620689654) internal successors, (4722), 29 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:50,469 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:50,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:50,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-24 13:46:50,669 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:50,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:50,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1734291993, now seen corresponding path program 49 times [2023-08-24 13:46:50,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:50,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138788206] [2023-08-24 13:46:50,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:46:51,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:51,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138788206] [2023-08-24 13:46:51,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138788206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:51,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028109638] [2023-08-24 13:46:51,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:46:51,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:51,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:51,549 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:51,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-24 13:46:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:51,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 13:46:51,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:51,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:46:52,126 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:46:52,126 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 60 treesize of output 32 [2023-08-24 13:46:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:52,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:52,354 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3824 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3824))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3824 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3824))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-08-24 13:46:52,385 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:52,385 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 116 treesize of output 144 [2023-08-24 13:46:52,404 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:52,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:46:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028109638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:52,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:52,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 32 [2023-08-24 13:46:52,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4377191] [2023-08-24 13:46:52,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:52,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 13:46:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 13:46:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=880, Unknown=1, NotChecked=60, Total=1056 [2023-08-24 13:46:52,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 488 [2023-08-24 13:46:52,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 572 transitions, 22394 flow. Second operand has 33 states, 33 states have (on average 144.6969696969697) internal successors, (4775), 33 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:52,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:52,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 488 [2023-08-24 13:46:52,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:46:55,597 INFO L124 PetriNetUnfolderBase]: 2581/4659 cut-off events. [2023-08-24 13:46:55,598 INFO L125 PetriNetUnfolderBase]: For 519519/519519 co-relation queries the response was YES. [2023-08-24 13:46:55,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89511 conditions, 4659 events. 2581/4659 cut-off events. For 519519/519519 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 32658 event pairs, 528 based on Foata normal form. 8/4667 useless extension candidates. Maximal degree in co-relation 89394. Up to 3230 conditions per place. [2023-08-24 13:46:55,674 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 264 selfloop transitions, 328 changer transitions 16/608 dead transitions. [2023-08-24 13:46:55,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 608 transitions, 24181 flow [2023-08-24 13:46:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:46:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:46:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2215 transitions. [2023-08-24 13:46:55,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025956284153005 [2023-08-24 13:46:55,676 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2215 transitions. [2023-08-24 13:46:55,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2215 transitions. [2023-08-24 13:46:55,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:46:55,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2215 transitions. [2023-08-24 13:46:55,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 147.66666666666666) internal successors, (2215), 15 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:55,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:55,681 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:55,681 INFO L175 Difference]: Start difference. First operand has 424 places, 572 transitions, 22394 flow. Second operand 15 states and 2215 transitions. [2023-08-24 13:46:55,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 608 transitions, 24181 flow [2023-08-24 13:46:57,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 608 transitions, 23942 flow, removed 17 selfloop flow, removed 11 redundant places. [2023-08-24 13:46:57,377 INFO L231 Difference]: Finished difference. Result has 427 places, 569 transitions, 22745 flow [2023-08-24 13:46:57,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=22160, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22745, PETRI_PLACES=427, PETRI_TRANSITIONS=569} [2023-08-24 13:46:57,377 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 404 predicate places. [2023-08-24 13:46:57,377 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 569 transitions, 22745 flow [2023-08-24 13:46:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 144.6969696969697) internal successors, (4775), 33 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:57,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:46:57,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:46:57,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-24 13:46:57,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-24 13:46:57,579 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:46:57,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:46:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1507046443, now seen corresponding path program 50 times [2023-08-24 13:46:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:46:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469810778] [2023-08-24 13:46:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:46:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:46:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:46:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:58,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:46:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469810778] [2023-08-24 13:46:58,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469810778] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:46:58,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354213346] [2023-08-24 13:46:58,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:46:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:46:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:46:58,141 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:46:58,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-24 13:46:58,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:46:58,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:46:58,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 77 conjunts are in the unsatisfiable core [2023-08-24 13:46:58,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:46:58,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:46:58,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:46:58,688 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:46:58,688 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 26 treesize of output 14 [2023-08-24 13:46:58,699 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:46:58,700 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 25 treesize of output 9 [2023-08-24 13:46:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:58,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:46:59,390 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:59,391 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 116 treesize of output 144 [2023-08-24 13:46:59,409 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:46:59,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:46:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:46:59,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354213346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:46:59,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:46:59,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 32 [2023-08-24 13:46:59,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673582176] [2023-08-24 13:46:59,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:46:59,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 13:46:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:46:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 13:46:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=933, Unknown=2, NotChecked=0, Total=1056 [2023-08-24 13:46:59,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 488 [2023-08-24 13:46:59,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 569 transitions, 22745 flow. Second operand has 33 states, 33 states have (on average 156.78787878787878) internal successors, (5174), 33 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:46:59,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:46:59,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 488 [2023-08-24 13:46:59,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:03,652 INFO L124 PetriNetUnfolderBase]: 2667/4845 cut-off events. [2023-08-24 13:47:03,652 INFO L125 PetriNetUnfolderBase]: For 533231/533231 co-relation queries the response was YES. [2023-08-24 13:47:03,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94553 conditions, 4845 events. 2667/4845 cut-off events. For 533231/533231 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34179 event pairs, 172 based on Foata normal form. 26/4871 useless extension candidates. Maximal degree in co-relation 94436. Up to 2442 conditions per place. [2023-08-24 13:47:03,734 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 330 selfloop transitions, 329 changer transitions 10/669 dead transitions. [2023-08-24 13:47:03,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 669 transitions, 26803 flow [2023-08-24 13:47:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 13:47:03,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 13:47:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4321 transitions. [2023-08-24 13:47:03,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32794474802671525 [2023-08-24 13:47:03,737 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4321 transitions. [2023-08-24 13:47:03,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4321 transitions. [2023-08-24 13:47:03,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:03,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4321 transitions. [2023-08-24 13:47:03,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 160.03703703703704) internal successors, (4321), 27 states have internal predecessors, (4321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:03,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 488.0) internal successors, (13664), 28 states have internal predecessors, (13664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:03,746 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 488.0) internal successors, (13664), 28 states have internal predecessors, (13664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:03,746 INFO L175 Difference]: Start difference. First operand has 427 places, 569 transitions, 22745 flow. Second operand 27 states and 4321 transitions. [2023-08-24 13:47:03,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 669 transitions, 26803 flow [2023-08-24 13:47:05,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 669 transitions, 26246 flow, removed 15 selfloop flow, removed 17 redundant places. [2023-08-24 13:47:05,586 INFO L231 Difference]: Finished difference. Result has 442 places, 593 transitions, 24529 flow [2023-08-24 13:47:05,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=22206, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24529, PETRI_PLACES=442, PETRI_TRANSITIONS=593} [2023-08-24 13:47:05,586 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 419 predicate places. [2023-08-24 13:47:05,586 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 593 transitions, 24529 flow [2023-08-24 13:47:05,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 156.78787878787878) internal successors, (5174), 33 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:05,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:05,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:05,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:05,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-24 13:47:05,788 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:05,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1419881073, now seen corresponding path program 51 times [2023-08-24 13:47:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:05,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467892957] [2023-08-24 13:47:05,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:05,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:06,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:06,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467892957] [2023-08-24 13:47:06,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467892957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:06,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769022953] [2023-08-24 13:47:06,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:47:06,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:06,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:06,364 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:06,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-24 13:47:06,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:47:06,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:06,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 13:47:06,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:47:06,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:47:06,923 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:06,923 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-24 13:47:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:06,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:07,276 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_3966 (Array Int Int)) (~o_2~0.base Int)) (not (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3966))) (= (select (select .cse0 ~o_2~0.base) c_~o_2~0.offset) (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| 4)) (forall ((v_ArrVal_3966 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3966))) (let ((.cse1 (select .cse2 ~o_2~0.base))) (or (not (= (select .cse1 c_~o_2~0.offset) (select (select .cse2 c_~o_0~0.base) c_~o_0~0.offset))) (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-08-24 13:47:07,285 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:07,285 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 70 treesize of output 66 [2023-08-24 13:47:07,292 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:07,292 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 55 [2023-08-24 13:47:07,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:07,326 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 116 treesize of output 144 [2023-08-24 13:47:07,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:07,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 82 [2023-08-24 13:47:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769022953] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:07,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-08-24 13:47:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710680025] [2023-08-24 13:47:07,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 13:47:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 13:47:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=767, Unknown=1, NotChecked=56, Total=930 [2023-08-24 13:47:07,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 488 [2023-08-24 13:47:07,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 593 transitions, 24529 flow. Second operand has 31 states, 31 states have (on average 159.8709677419355) internal successors, (4956), 31 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:07,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:07,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 488 [2023-08-24 13:47:07,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:11,400 INFO L124 PetriNetUnfolderBase]: 2623/4713 cut-off events. [2023-08-24 13:47:11,400 INFO L125 PetriNetUnfolderBase]: For 589612/589612 co-relation queries the response was YES. [2023-08-24 13:47:11,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96187 conditions, 4713 events. 2623/4713 cut-off events. For 589612/589612 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 32425 event pairs, 200 based on Foata normal form. 20/4733 useless extension candidates. Maximal degree in co-relation 96067. Up to 2568 conditions per place. [2023-08-24 13:47:11,484 INFO L140 encePairwiseOnDemand]: 475/488 looper letters, 306 selfloop transitions, 327 changer transitions 12/645 dead transitions. [2023-08-24 13:47:11,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 645 transitions, 26893 flow [2023-08-24 13:47:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 13:47:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 13:47:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3742 transitions. [2023-08-24 13:47:11,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333927298645759 [2023-08-24 13:47:11,487 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3742 transitions. [2023-08-24 13:47:11,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3742 transitions. [2023-08-24 13:47:11,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:11,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3742 transitions. [2023-08-24 13:47:11,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 162.69565217391303) internal successors, (3742), 23 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:11,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 488.0) internal successors, (11712), 24 states have internal predecessors, (11712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:11,494 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 488.0) internal successors, (11712), 24 states have internal predecessors, (11712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:11,494 INFO L175 Difference]: Start difference. First operand has 442 places, 593 transitions, 24529 flow. Second operand 23 states and 3742 transitions. [2023-08-24 13:47:11,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 645 transitions, 26893 flow [2023-08-24 13:47:13,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 645 transitions, 25982 flow, removed 224 selfloop flow, removed 19 redundant places. [2023-08-24 13:47:13,633 INFO L231 Difference]: Finished difference. Result has 445 places, 589 transitions, 24399 flow [2023-08-24 13:47:13,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=23528, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=24399, PETRI_PLACES=445, PETRI_TRANSITIONS=589} [2023-08-24 13:47:13,634 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 422 predicate places. [2023-08-24 13:47:13,634 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 589 transitions, 24399 flow [2023-08-24 13:47:13,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 159.8709677419355) internal successors, (4956), 31 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:13,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:13,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:13,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:13,835 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:13,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1364362347, now seen corresponding path program 52 times [2023-08-24 13:47:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:13,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026107743] [2023-08-24 13:47:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:14,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026107743] [2023-08-24 13:47:14,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026107743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:14,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303278383] [2023-08-24 13:47:14,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:47:14,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:14,303 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:14,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-24 13:47:14,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:47:14,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:14,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:47:14,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:14,744 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:47:14,745 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 26 treesize of output 14 [2023-08-24 13:47:14,753 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:47:14,753 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 25 treesize of output 9 [2023-08-24 13:47:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:14,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:14,968 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:47:14,968 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 70 treesize of output 70 [2023-08-24 13:47:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:15,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303278383] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:15,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:15,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:47:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419304981] [2023-08-24 13:47:15,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:15,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:47:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:47:15,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:47:15,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:47:15,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 589 transitions, 24399 flow. Second operand has 21 states, 21 states have (on average 167.0) internal successors, (3507), 21 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:15,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:15,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:47:15,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:18,021 INFO L124 PetriNetUnfolderBase]: 2755/4943 cut-off events. [2023-08-24 13:47:18,021 INFO L125 PetriNetUnfolderBase]: For 623756/623756 co-relation queries the response was YES. [2023-08-24 13:47:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101235 conditions, 4943 events. 2755/4943 cut-off events. For 623756/623756 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 34272 event pairs, 42 based on Foata normal form. 8/4951 useless extension candidates. Maximal degree in co-relation 101117. Up to 1967 conditions per place. [2023-08-24 13:47:18,108 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 217 selfloop transitions, 485 changer transitions 8/710 dead transitions. [2023-08-24 13:47:18,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 710 transitions, 28929 flow [2023-08-24 13:47:18,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 13:47:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 13:47:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3745 transitions. [2023-08-24 13:47:18,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3488263785394933 [2023-08-24 13:47:18,116 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3745 transitions. [2023-08-24 13:47:18,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3745 transitions. [2023-08-24 13:47:18,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:18,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3745 transitions. [2023-08-24 13:47:18,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 170.22727272727272) internal successors, (3745), 22 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:18,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 488.0) internal successors, (11224), 23 states have internal predecessors, (11224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:18,123 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 488.0) internal successors, (11224), 23 states have internal predecessors, (11224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:18,123 INFO L175 Difference]: Start difference. First operand has 445 places, 589 transitions, 24399 flow. Second operand 22 states and 3745 transitions. [2023-08-24 13:47:18,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 710 transitions, 28929 flow [2023-08-24 13:47:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 710 transitions, 28062 flow, removed 75 selfloop flow, removed 22 redundant places. [2023-08-24 13:47:20,261 INFO L231 Difference]: Finished difference. Result has 444 places, 606 transitions, 25578 flow [2023-08-24 13:47:20,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=23618, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=25578, PETRI_PLACES=444, PETRI_TRANSITIONS=606} [2023-08-24 13:47:20,262 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 421 predicate places. [2023-08-24 13:47:20,262 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 606 transitions, 25578 flow [2023-08-24 13:47:20,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0) internal successors, (3507), 21 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:20,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:20,263 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:20,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:20,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:20,463 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:20,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1605780763, now seen corresponding path program 53 times [2023-08-24 13:47:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:20,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647316247] [2023-08-24 13:47:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:20,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:20,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:20,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647316247] [2023-08-24 13:47:20,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647316247] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:20,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098968746] [2023-08-24 13:47:20,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:47:20,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:20,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:20,936 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:20,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-24 13:47:21,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:47:21,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:21,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:47:21,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:21,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:21,560 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:47:21,561 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 62 treesize of output 62 [2023-08-24 13:47:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:21,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098968746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:21,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:21,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:47:21,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392724253] [2023-08-24 13:47:21,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:21,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:47:21,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:47:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:47:21,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:47:21,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 606 transitions, 25578 flow. Second operand has 19 states, 19 states have (on average 167.1578947368421) internal successors, (3176), 19 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:21,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:21,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:47:21,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:24,015 INFO L124 PetriNetUnfolderBase]: 2905/5195 cut-off events. [2023-08-24 13:47:24,015 INFO L125 PetriNetUnfolderBase]: For 666848/666848 co-relation queries the response was YES. [2023-08-24 13:47:24,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108080 conditions, 5195 events. 2905/5195 cut-off events. For 666848/666848 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 36251 event pairs, 60 based on Foata normal form. 8/5203 useless extension candidates. Maximal degree in co-relation 107962. Up to 2083 conditions per place. [2023-08-24 13:47:24,106 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 209 selfloop transitions, 500 changer transitions 5/714 dead transitions. [2023-08-24 13:47:24,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 714 transitions, 30021 flow [2023-08-24 13:47:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 13:47:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 13:47:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3063 transitions. [2023-08-24 13:47:24,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34870218579234974 [2023-08-24 13:47:24,108 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3063 transitions. [2023-08-24 13:47:24,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3063 transitions. [2023-08-24 13:47:24,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:24,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3063 transitions. [2023-08-24 13:47:24,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 170.16666666666666) internal successors, (3063), 18 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:24,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:24,114 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:24,114 INFO L175 Difference]: Start difference. First operand has 444 places, 606 transitions, 25578 flow. Second operand 18 states and 3063 transitions. [2023-08-24 13:47:24,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 714 transitions, 30021 flow [2023-08-24 13:47:26,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 714 transitions, 29187 flow, removed 95 selfloop flow, removed 10 redundant places. [2023-08-24 13:47:26,581 INFO L231 Difference]: Finished difference. Result has 455 places, 628 transitions, 27188 flow [2023-08-24 13:47:26,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=24798, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27188, PETRI_PLACES=455, PETRI_TRANSITIONS=628} [2023-08-24 13:47:26,582 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 432 predicate places. [2023-08-24 13:47:26,582 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 628 transitions, 27188 flow [2023-08-24 13:47:26,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.1578947368421) internal successors, (3176), 19 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:26,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:26,583 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:26,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:26,783 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:26,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1173382119, now seen corresponding path program 54 times [2023-08-24 13:47:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395051986] [2023-08-24 13:47:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:27,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:27,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395051986] [2023-08-24 13:47:27,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395051986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:27,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483347030] [2023-08-24 13:47:27,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:47:27,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:27,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:27,354 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:27,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-24 13:47:27,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:47:27,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:27,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:47:27,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:27,769 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:47:27,770 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 26 treesize of output 14 [2023-08-24 13:47:27,781 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:47:27,781 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 25 treesize of output 9 [2023-08-24 13:47:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:27,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:28,168 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:47:28,169 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 40 treesize of output 56 [2023-08-24 13:47:28,188 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:47:28,188 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 20 treesize of output 4 [2023-08-24 13:47:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:28,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483347030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:28,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:28,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2023-08-24 13:47:28,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119416380] [2023-08-24 13:47:28,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:28,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 13:47:28,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 13:47:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-08-24 13:47:28,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:47:28,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 628 transitions, 27188 flow. Second operand has 23 states, 23 states have (on average 164.04347826086956) internal successors, (3773), 23 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:28,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:28,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:47:28,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:31,746 INFO L124 PetriNetUnfolderBase]: 3069/5535 cut-off events. [2023-08-24 13:47:31,746 INFO L125 PetriNetUnfolderBase]: For 729432/729432 co-relation queries the response was YES. [2023-08-24 13:47:31,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115907 conditions, 5535 events. 3069/5535 cut-off events. For 729432/729432 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 39450 event pairs, 428 based on Foata normal form. 22/5557 useless extension candidates. Maximal degree in co-relation 115786. Up to 2918 conditions per place. [2023-08-24 13:47:32,029 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 299 selfloop transitions, 431 changer transitions 12/742 dead transitions. [2023-08-24 13:47:32,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 742 transitions, 31636 flow [2023-08-24 13:47:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 13:47:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 13:47:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4022 transitions. [2023-08-24 13:47:32,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434084699453552 [2023-08-24 13:47:32,032 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4022 transitions. [2023-08-24 13:47:32,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4022 transitions. [2023-08-24 13:47:32,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:32,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4022 transitions. [2023-08-24 13:47:32,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 167.58333333333334) internal successors, (4022), 24 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:32,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:32,040 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:32,040 INFO L175 Difference]: Start difference. First operand has 455 places, 628 transitions, 27188 flow. Second operand 24 states and 4022 transitions. [2023-08-24 13:47:32,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 742 transitions, 31636 flow [2023-08-24 13:47:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 742 transitions, 30925 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-08-24 13:47:34,776 INFO L231 Difference]: Finished difference. Result has 477 places, 650 transitions, 29173 flow [2023-08-24 13:47:34,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=26407, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=29173, PETRI_PLACES=477, PETRI_TRANSITIONS=650} [2023-08-24 13:47:34,777 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 454 predicate places. [2023-08-24 13:47:34,777 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 650 transitions, 29173 flow [2023-08-24 13:47:34,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 164.04347826086956) internal successors, (3773), 23 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:34,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:34,778 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:34,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-08-24 13:47:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-24 13:47:34,978 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:34,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:34,978 INFO L85 PathProgramCache]: Analyzing trace with hash 451014181, now seen corresponding path program 55 times [2023-08-24 13:47:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466435932] [2023-08-24 13:47:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:34,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:35,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:35,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466435932] [2023-08-24 13:47:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466435932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:35,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223253551] [2023-08-24 13:47:35,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:47:35,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:35,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:35,444 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:35,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-24 13:47:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:35,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:47:35,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:35,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:36,063 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:47:36,063 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 82 treesize of output 99 [2023-08-24 13:47:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:36,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223253551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:36,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:36,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:47:36,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831361532] [2023-08-24 13:47:36,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:36,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:47:36,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:36,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:47:36,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:47:36,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:47:36,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 650 transitions, 29173 flow. Second operand has 19 states, 19 states have (on average 167.10526315789474) internal successors, (3175), 19 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:36,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:36,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:47:36,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:39,091 INFO L124 PetriNetUnfolderBase]: 3099/5563 cut-off events. [2023-08-24 13:47:39,091 INFO L125 PetriNetUnfolderBase]: For 821618/821618 co-relation queries the response was YES. [2023-08-24 13:47:39,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121389 conditions, 5563 events. 3099/5563 cut-off events. For 821618/821618 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 39450 event pairs, 520 based on Foata normal form. 8/5571 useless extension candidates. Maximal degree in co-relation 121258. Up to 2939 conditions per place. [2023-08-24 13:47:39,195 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 268 selfloop transitions, 446 changer transitions 0/714 dead transitions. [2023-08-24 13:47:39,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 714 transitions, 32295 flow [2023-08-24 13:47:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:47:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:47:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2716 transitions. [2023-08-24 13:47:39,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3478483606557377 [2023-08-24 13:47:39,197 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2716 transitions. [2023-08-24 13:47:39,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2716 transitions. [2023-08-24 13:47:39,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:39,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2716 transitions. [2023-08-24 13:47:39,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 169.75) internal successors, (2716), 16 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:39,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:39,203 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:39,203 INFO L175 Difference]: Start difference. First operand has 477 places, 650 transitions, 29173 flow. Second operand 16 states and 2716 transitions. [2023-08-24 13:47:39,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 714 transitions, 32295 flow [2023-08-24 13:47:42,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 714 transitions, 31514 flow, removed 269 selfloop flow, removed 9 redundant places. [2023-08-24 13:47:42,464 INFO L231 Difference]: Finished difference. Result has 484 places, 656 transitions, 30045 flow [2023-08-24 13:47:42,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=28500, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=30045, PETRI_PLACES=484, PETRI_TRANSITIONS=656} [2023-08-24 13:47:42,465 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 461 predicate places. [2023-08-24 13:47:42,465 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 656 transitions, 30045 flow [2023-08-24 13:47:42,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.10526315789474) internal successors, (3175), 19 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:42,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:42,466 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:42,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:42,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-08-24 13:47:42,677 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:42,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:42,677 INFO L85 PathProgramCache]: Analyzing trace with hash -482422735, now seen corresponding path program 56 times [2023-08-24 13:47:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:42,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356338916] [2023-08-24 13:47:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:42,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:43,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356338916] [2023-08-24 13:47:43,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356338916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:43,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828641442] [2023-08-24 13:47:43,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:47:43,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:43,168 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:43,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-24 13:47:43,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:47:43,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:43,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:47:43,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:43,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:43,804 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:47:43,804 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 74 treesize of output 91 [2023-08-24 13:47:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:43,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828641442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:43,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:43,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-24 13:47:43,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270849436] [2023-08-24 13:47:43,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:43,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 13:47:43,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:43,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 13:47:43,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-08-24 13:47:43,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:47:43,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 656 transitions, 30045 flow. Second operand has 18 states, 18 states have (on average 167.16666666666666) internal successors, (3009), 18 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:43,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:43,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:47:43,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:46,720 INFO L124 PetriNetUnfolderBase]: 3183/5703 cut-off events. [2023-08-24 13:47:46,720 INFO L125 PetriNetUnfolderBase]: For 880805/880805 co-relation queries the response was YES. [2023-08-24 13:47:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126406 conditions, 5703 events. 3183/5703 cut-off events. For 880805/880805 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 40585 event pairs, 530 based on Foata normal form. 8/5711 useless extension candidates. Maximal degree in co-relation 126274. Up to 2977 conditions per place. [2023-08-24 13:47:46,905 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 269 selfloop transitions, 450 changer transitions 0/719 dead transitions. [2023-08-24 13:47:46,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 719 transitions, 33307 flow [2023-08-24 13:47:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:47:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:47:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2378 transitions. [2023-08-24 13:47:46,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34806791569086654 [2023-08-24 13:47:46,908 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2378 transitions. [2023-08-24 13:47:46,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2378 transitions. [2023-08-24 13:47:46,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:46,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2378 transitions. [2023-08-24 13:47:46,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 169.85714285714286) internal successors, (2378), 14 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:46,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:46,913 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:46,913 INFO L175 Difference]: Start difference. First operand has 484 places, 656 transitions, 30045 flow. Second operand 14 states and 2378 transitions. [2023-08-24 13:47:46,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 719 transitions, 33307 flow [2023-08-24 13:47:50,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 719 transitions, 32765 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-08-24 13:47:50,303 INFO L231 Difference]: Finished difference. Result has 487 places, 664 transitions, 31367 flow [2023-08-24 13:47:50,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=29509, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=31367, PETRI_PLACES=487, PETRI_TRANSITIONS=664} [2023-08-24 13:47:50,304 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-08-24 13:47:50,304 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 664 transitions, 31367 flow [2023-08-24 13:47:50,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 167.16666666666666) internal successors, (3009), 18 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:50,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:50,304 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:50,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:50,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:50,505 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:50,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1997420379, now seen corresponding path program 57 times [2023-08-24 13:47:50,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:50,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984219395] [2023-08-24 13:47:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:50,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:50,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984219395] [2023-08-24 13:47:50,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984219395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667968300] [2023-08-24 13:47:50,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:47:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:50,997 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:51,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-24 13:47:51,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:47:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:51,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:47:51,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:51,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:51,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-24 13:47:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:51,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:47:51,719 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:47:51,719 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 74 treesize of output 91 [2023-08-24 13:47:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:51,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667968300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:47:51,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:47:51,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:47:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181490782] [2023-08-24 13:47:51,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:47:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:47:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:47:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:47:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:47:51,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:47:51,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 664 transitions, 31367 flow. Second operand has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:51,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:47:51,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:47:51,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:47:55,165 INFO L124 PetriNetUnfolderBase]: 3223/5793 cut-off events. [2023-08-24 13:47:55,165 INFO L125 PetriNetUnfolderBase]: For 938272/938272 co-relation queries the response was YES. [2023-08-24 13:47:55,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131153 conditions, 5793 events. 3223/5793 cut-off events. For 938272/938272 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41515 event pairs, 572 based on Foata normal form. 20/5813 useless extension candidates. Maximal degree in co-relation 131019. Up to 3133 conditions per place. [2023-08-24 13:47:55,274 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 302 selfloop transitions, 429 changer transitions 8/739 dead transitions. [2023-08-24 13:47:55,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 739 transitions, 34668 flow [2023-08-24 13:47:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 13:47:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 13:47:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3063 transitions. [2023-08-24 13:47:55,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34870218579234974 [2023-08-24 13:47:55,276 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3063 transitions. [2023-08-24 13:47:55,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3063 transitions. [2023-08-24 13:47:55,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:47:55,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3063 transitions. [2023-08-24 13:47:55,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 170.16666666666666) internal successors, (3063), 18 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:55,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:55,282 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:55,282 INFO L175 Difference]: Start difference. First operand has 487 places, 664 transitions, 31367 flow. Second operand 18 states and 3063 transitions. [2023-08-24 13:47:55,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 739 transitions, 34668 flow [2023-08-24 13:47:58,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 739 transitions, 34531 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-24 13:47:58,798 INFO L231 Difference]: Finished difference. Result has 501 places, 667 transitions, 32847 flow [2023-08-24 13:47:58,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=31202, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=32847, PETRI_PLACES=501, PETRI_TRANSITIONS=667} [2023-08-24 13:47:58,799 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 478 predicate places. [2023-08-24 13:47:58,800 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 667 transitions, 32847 flow [2023-08-24 13:47:58,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:47:58,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:47:58,800 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:47:58,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-24 13:47:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:59,007 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:47:59,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:47:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -989681713, now seen corresponding path program 58 times [2023-08-24 13:47:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:47:59,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146282353] [2023-08-24 13:47:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:47:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:47:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:47:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:59,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:47:59,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146282353] [2023-08-24 13:47:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146282353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:47:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930066384] [2023-08-24 13:47:59,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:47:59,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:47:59,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:47:59,523 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:47:59,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-24 13:47:59,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:47:59,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:47:59,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:47:59,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:47:59,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:47:59,946 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 65 treesize of output 41 [2023-08-24 13:47:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:47:59,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:00,148 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:48:00,149 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 40 treesize of output 56 [2023-08-24 13:48:00,164 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:48:00,164 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 20 treesize of output 4 [2023-08-24 13:48:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:00,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930066384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:00,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:00,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:48:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679262486] [2023-08-24 13:48:00,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:48:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:00,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:48:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:48:00,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:48:00,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 667 transitions, 32847 flow. Second operand has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:00,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:00,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:48:00,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:03,720 INFO L124 PetriNetUnfolderBase]: 3219/5795 cut-off events. [2023-08-24 13:48:03,720 INFO L125 PetriNetUnfolderBase]: For 993415/993415 co-relation queries the response was YES. [2023-08-24 13:48:03,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134438 conditions, 5795 events. 3219/5795 cut-off events. For 993415/993415 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 41650 event pairs, 580 based on Foata normal form. 20/5815 useless extension candidates. Maximal degree in co-relation 134300. Up to 3171 conditions per place. [2023-08-24 13:48:03,822 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 294 selfloop transitions, 428 changer transitions 9/731 dead transitions. [2023-08-24 13:48:03,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 731 transitions, 35456 flow [2023-08-24 13:48:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 13:48:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 13:48:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2730 transitions. [2023-08-24 13:48:03,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34964139344262296 [2023-08-24 13:48:03,824 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2730 transitions. [2023-08-24 13:48:03,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2730 transitions. [2023-08-24 13:48:03,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:03,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2730 transitions. [2023-08-24 13:48:03,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 170.625) internal successors, (2730), 16 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:03,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:03,830 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 488.0) internal successors, (8296), 17 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:03,830 INFO L175 Difference]: Start difference. First operand has 501 places, 667 transitions, 32847 flow. Second operand 16 states and 2730 transitions. [2023-08-24 13:48:03,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 731 transitions, 35456 flow [2023-08-24 13:48:07,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 731 transitions, 35075 flow, removed 77 selfloop flow, removed 15 redundant places. [2023-08-24 13:48:07,300 INFO L231 Difference]: Finished difference. Result has 503 places, 667 transitions, 33516 flow [2023-08-24 13:48:07,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=32478, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=33516, PETRI_PLACES=503, PETRI_TRANSITIONS=667} [2023-08-24 13:48:07,301 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 480 predicate places. [2023-08-24 13:48:07,301 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 667 transitions, 33516 flow [2023-08-24 13:48:07,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:07,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:07,302 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:07,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-24 13:48:07,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-24 13:48:07,502 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:48:07,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:07,502 INFO L85 PathProgramCache]: Analyzing trace with hash 899350653, now seen corresponding path program 59 times [2023-08-24 13:48:07,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:07,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802252355] [2023-08-24 13:48:07,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:07,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:07,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:07,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802252355] [2023-08-24 13:48:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802252355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:07,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615039615] [2023-08-24 13:48:07,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:48:07,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:07,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:08,000 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:48:08,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-24 13:48:08,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:48:08,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:48:08,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:48:08,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:08,464 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 39 treesize of output 23 [2023-08-24 13:48:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:08,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:08,655 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:48:08,656 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 40 treesize of output 56 [2023-08-24 13:48:08,671 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:48:08,671 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 20 treesize of output 4 [2023-08-24 13:48:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:08,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615039615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:08,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:08,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:48:08,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364252824] [2023-08-24 13:48:08,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:08,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:48:08,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:08,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:48:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:48:08,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:48:08,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 667 transitions, 33516 flow. Second operand has 19 states, 19 states have (on average 167.31578947368422) internal successors, (3179), 19 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:08,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:08,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:48:08,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:11,685 INFO L124 PetriNetUnfolderBase]: 3209/5741 cut-off events. [2023-08-24 13:48:11,686 INFO L125 PetriNetUnfolderBase]: For 1031540/1031540 co-relation queries the response was YES. [2023-08-24 13:48:11,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136468 conditions, 5741 events. 3209/5741 cut-off events. For 1031540/1031540 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 40872 event pairs, 535 based on Foata normal form. 8/5749 useless extension candidates. Maximal degree in co-relation 136329. Up to 2981 conditions per place. [2023-08-24 13:48:11,814 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 253 selfloop transitions, 452 changer transitions 1/706 dead transitions. [2023-08-24 13:48:11,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 706 transitions, 35921 flow [2023-08-24 13:48:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:48:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:48:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1871 transitions. [2023-08-24 13:48:11,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34854694485842025 [2023-08-24 13:48:11,817 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1871 transitions. [2023-08-24 13:48:11,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1871 transitions. [2023-08-24 13:48:11,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:11,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1871 transitions. [2023-08-24 13:48:11,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 170.0909090909091) internal successors, (1871), 11 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:11,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:11,821 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:11,821 INFO L175 Difference]: Start difference. First operand has 503 places, 667 transitions, 33516 flow. Second operand 11 states and 1871 transitions. [2023-08-24 13:48:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 706 transitions, 35921 flow [2023-08-24 13:48:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 706 transitions, 35628 flow, removed 59 selfloop flow, removed 9 redundant places. [2023-08-24 13:48:15,936 INFO L231 Difference]: Finished difference. Result has 501 places, 666 transitions, 34669 flow [2023-08-24 13:48:15,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=33146, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34669, PETRI_PLACES=501, PETRI_TRANSITIONS=666} [2023-08-24 13:48:15,937 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 478 predicate places. [2023-08-24 13:48:15,937 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 666 transitions, 34669 flow [2023-08-24 13:48:15,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.31578947368422) internal successors, (3179), 19 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:15,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:15,937 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:15,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-24 13:48:16,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-24 13:48:16,138 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:48:16,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:16,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1563145585, now seen corresponding path program 60 times [2023-08-24 13:48:16,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:16,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083656953] [2023-08-24 13:48:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:16,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083656953] [2023-08-24 13:48:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083656953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553921168] [2023-08-24 13:48:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:48:16,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:16,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:16,603 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:48:16,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-24 13:48:16,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 13:48:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:48:16,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:48:16,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:17,040 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:48:17,040 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 60 treesize of output 32 [2023-08-24 13:48:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:17,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:17,174 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:48:17,174 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 40 treesize of output 56 [2023-08-24 13:48:17,189 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:48:17,189 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 20 treesize of output 4 [2023-08-24 13:48:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:17,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553921168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:17,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:17,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:48:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271914231] [2023-08-24 13:48:17,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:17,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:48:17,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:48:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:48:17,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:48:17,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 666 transitions, 34669 flow. Second operand has 19 states, 19 states have (on average 167.21052631578948) internal successors, (3177), 19 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:17,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:17,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:48:17,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:20,089 INFO L124 PetriNetUnfolderBase]: 3189/5701 cut-off events. [2023-08-24 13:48:20,089 INFO L125 PetriNetUnfolderBase]: For 1041560/1041560 co-relation queries the response was YES. [2023-08-24 13:48:20,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137848 conditions, 5701 events. 3189/5701 cut-off events. For 1041560/1041560 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 40375 event pairs, 812 based on Foata normal form. 8/5709 useless extension candidates. Maximal degree in co-relation 137710. Up to 4125 conditions per place. [2023-08-24 13:48:20,192 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 279 selfloop transitions, 406 changer transitions 15/700 dead transitions. [2023-08-24 13:48:20,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 700 transitions, 36504 flow [2023-08-24 13:48:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:48:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:48:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1874 transitions. [2023-08-24 13:48:20,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3491058122205663 [2023-08-24 13:48:20,194 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1874 transitions. [2023-08-24 13:48:20,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1874 transitions. [2023-08-24 13:48:20,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:20,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1874 transitions. [2023-08-24 13:48:20,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 170.36363636363637) internal successors, (1874), 11 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:20,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:20,198 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 488.0) internal successors, (5856), 12 states have internal predecessors, (5856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:20,198 INFO L175 Difference]: Start difference. First operand has 501 places, 666 transitions, 34669 flow. Second operand 11 states and 1874 transitions. [2023-08-24 13:48:20,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 700 transitions, 36504 flow [2023-08-24 13:48:24,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 700 transitions, 36311 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-24 13:48:24,138 INFO L231 Difference]: Finished difference. Result has 505 places, 663 transitions, 35159 flow [2023-08-24 13:48:24,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=34478, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=35159, PETRI_PLACES=505, PETRI_TRANSITIONS=663} [2023-08-24 13:48:24,139 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 482 predicate places. [2023-08-24 13:48:24,139 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 663 transitions, 35159 flow [2023-08-24 13:48:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.21052631578948) internal successors, (3177), 19 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:24,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:24,139 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:24,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-24 13:48:24,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:24,341 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:48:24,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:24,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1333213877, now seen corresponding path program 61 times [2023-08-24 13:48:24,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:24,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944911278] [2023-08-24 13:48:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:24,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944911278] [2023-08-24 13:48:24,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944911278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055875094] [2023-08-24 13:48:24,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:48:24,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:24,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:24,798 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:48:24,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-24 13:48:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:25,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:48:25,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:25,405 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:48:25,405 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 25 treesize of output 9 [2023-08-24 13:48:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:25,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:25,713 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:48:25,714 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 62 treesize of output 62 [2023-08-24 13:48:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:25,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055875094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:25,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:25,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 25 [2023-08-24 13:48:25,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623861596] [2023-08-24 13:48:25,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:25,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 13:48:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 13:48:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-08-24 13:48:25,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:48:25,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 663 transitions, 35159 flow. Second operand has 25 states, 25 states have (on average 163.96) internal successors, (4099), 25 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:25,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:25,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:48:25,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:29,886 INFO L124 PetriNetUnfolderBase]: 3363/6007 cut-off events. [2023-08-24 13:48:29,886 INFO L125 PetriNetUnfolderBase]: For 1179082/1179082 co-relation queries the response was YES. [2023-08-24 13:48:29,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150430 conditions, 6007 events. 3363/6007 cut-off events. For 1179082/1179082 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43040 event pairs, 80 based on Foata normal form. 12/6019 useless extension candidates. Maximal degree in co-relation 150291. Up to 2712 conditions per place. [2023-08-24 13:48:30,003 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 240 selfloop transitions, 545 changer transitions 4/789 dead transitions. [2023-08-24 13:48:30,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 789 transitions, 41611 flow [2023-08-24 13:48:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 13:48:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 13:48:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4003 transitions. [2023-08-24 13:48:30,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34178620218579236 [2023-08-24 13:48:30,006 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4003 transitions. [2023-08-24 13:48:30,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4003 transitions. [2023-08-24 13:48:30,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:30,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4003 transitions. [2023-08-24 13:48:30,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 166.79166666666666) internal successors, (4003), 24 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:30,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:30,014 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 488.0) internal successors, (12200), 25 states have internal predecessors, (12200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:30,014 INFO L175 Difference]: Start difference. First operand has 505 places, 663 transitions, 35159 flow. Second operand 24 states and 4003 transitions. [2023-08-24 13:48:30,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 789 transitions, 41611 flow [2023-08-24 13:48:34,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 789 transitions, 40911 flow, removed 21 selfloop flow, removed 30 redundant places. [2023-08-24 13:48:34,121 INFO L231 Difference]: Finished difference. Result has 503 places, 718 transitions, 40072 flow [2023-08-24 13:48:34,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=34457, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=487, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=40072, PETRI_PLACES=503, PETRI_TRANSITIONS=718} [2023-08-24 13:48:34,122 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 480 predicate places. [2023-08-24 13:48:34,122 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 718 transitions, 40072 flow [2023-08-24 13:48:34,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 163.96) internal successors, (4099), 25 states have internal predecessors, (4099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:34,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:34,123 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:34,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-24 13:48:34,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-24 13:48:34,323 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:48:34,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1372217781, now seen corresponding path program 62 times [2023-08-24 13:48:34,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:34,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096506383] [2023-08-24 13:48:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:34,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096506383] [2023-08-24 13:48:34,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096506383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546541575] [2023-08-24 13:48:34,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:48:34,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:34,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:34,809 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:48:34,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-24 13:48:35,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:48:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:48:35,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:48:35,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:35,327 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:48:35,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-24 13:48:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:35,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:35,553 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:48:35,554 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 62 treesize of output 62 [2023-08-24 13:48:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:35,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546541575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:35,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:35,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:48:35,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878152698] [2023-08-24 13:48:35,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:35,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:48:35,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:48:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:48:35,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:48:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 718 transitions, 40072 flow. Second operand has 22 states, 22 states have (on average 166.95454545454547) internal successors, (3673), 22 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:35,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:48:35,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:39,236 INFO L124 PetriNetUnfolderBase]: 3337/5959 cut-off events. [2023-08-24 13:48:39,236 INFO L125 PetriNetUnfolderBase]: For 1244706/1244706 co-relation queries the response was YES. [2023-08-24 13:48:39,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154462 conditions, 5959 events. 3337/5959 cut-off events. For 1244706/1244706 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42536 event pairs, 64 based on Foata normal form. 10/5969 useless extension candidates. Maximal degree in co-relation 154340. Up to 2411 conditions per place. [2023-08-24 13:48:39,347 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 251 selfloop transitions, 523 changer transitions 7/781 dead transitions. [2023-08-24 13:48:39,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 781 transitions, 42938 flow [2023-08-24 13:48:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 13:48:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 13:48:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2901 transitions. [2023-08-24 13:48:39,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34968659594985535 [2023-08-24 13:48:39,349 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2901 transitions. [2023-08-24 13:48:39,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2901 transitions. [2023-08-24 13:48:39,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:39,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2901 transitions. [2023-08-24 13:48:39,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 170.64705882352942) internal successors, (2901), 17 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:39,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 488.0) internal successors, (8784), 18 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:39,354 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 488.0) internal successors, (8784), 18 states have internal predecessors, (8784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:39,354 INFO L175 Difference]: Start difference. First operand has 503 places, 718 transitions, 40072 flow. Second operand 17 states and 2901 transitions. [2023-08-24 13:48:39,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 781 transitions, 42938 flow [2023-08-24 13:48:44,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 781 transitions, 41944 flow, removed 215 selfloop flow, removed 19 redundant places. [2023-08-24 13:48:44,281 INFO L231 Difference]: Finished difference. Result has 499 places, 715 transitions, 40133 flow [2023-08-24 13:48:44,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=39113, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=40133, PETRI_PLACES=499, PETRI_TRANSITIONS=715} [2023-08-24 13:48:44,282 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 476 predicate places. [2023-08-24 13:48:44,282 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 715 transitions, 40133 flow [2023-08-24 13:48:44,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 166.95454545454547) internal successors, (3673), 22 states have internal predecessors, (3673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:44,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:44,283 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:44,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-24 13:48:44,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:44,484 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:48:44,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:44,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1060725375, now seen corresponding path program 63 times [2023-08-24 13:48:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:44,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028896134] [2023-08-24 13:48:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:44,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:44,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028896134] [2023-08-24 13:48:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028896134] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492144865] [2023-08-24 13:48:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:48:44,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:44,953 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:48:44,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-24 13:48:45,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:48:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:48:45,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:48:45,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:45,402 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:48:45,402 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 59 treesize of output 35 [2023-08-24 13:48:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:45,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:45,630 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:48:45,631 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 40 treesize of output 56 [2023-08-24 13:48:45,644 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:48:45,644 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 20 treesize of output 4 [2023-08-24 13:48:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492144865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:45,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:45,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2023-08-24 13:48:45,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068891454] [2023-08-24 13:48:45,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:45,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 13:48:45,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 13:48:45,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 13:48:45,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:48:45,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 715 transitions, 40133 flow. Second operand has 18 states, 18 states have (on average 167.22222222222223) internal successors, (3010), 18 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:45,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:45,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:48:45,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:48,492 INFO L124 PetriNetUnfolderBase]: 3311/5873 cut-off events. [2023-08-24 13:48:48,492 INFO L125 PetriNetUnfolderBase]: For 1268889/1268889 co-relation queries the response was YES. [2023-08-24 13:48:48,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153896 conditions, 5873 events. 3311/5873 cut-off events. For 1268889/1268889 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 41692 event pairs, 530 based on Foata normal form. 8/5881 useless extension candidates. Maximal degree in co-relation 153779. Up to 2937 conditions per place. [2023-08-24 13:48:48,605 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 252 selfloop transitions, 495 changer transitions 0/747 dead transitions. [2023-08-24 13:48:48,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 747 transitions, 42231 flow [2023-08-24 13:48:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:48:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:48:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2207 transitions. [2023-08-24 13:48:48,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3478877679697352 [2023-08-24 13:48:48,607 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2207 transitions. [2023-08-24 13:48:48,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2207 transitions. [2023-08-24 13:48:48,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:48,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2207 transitions. [2023-08-24 13:48:48,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 169.76923076923077) internal successors, (2207), 13 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:48,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:48,611 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:48,611 INFO L175 Difference]: Start difference. First operand has 499 places, 715 transitions, 40133 flow. Second operand 13 states and 2207 transitions. [2023-08-24 13:48:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 747 transitions, 42231 flow [2023-08-24 13:48:53,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 747 transitions, 41312 flow, removed 42 selfloop flow, removed 15 redundant places. [2023-08-24 13:48:53,234 INFO L231 Difference]: Finished difference. Result has 492 places, 714 transitions, 40207 flow [2023-08-24 13:48:53,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=39217, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=495, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=40207, PETRI_PLACES=492, PETRI_TRANSITIONS=714} [2023-08-24 13:48:53,235 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 469 predicate places. [2023-08-24 13:48:53,235 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 714 transitions, 40207 flow [2023-08-24 13:48:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 167.22222222222223) internal successors, (3010), 18 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:53,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:48:53,235 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:48:53,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-24 13:48:53,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:53,442 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:48:53,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:48:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1993358501, now seen corresponding path program 64 times [2023-08-24 13:48:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:48:53,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079561949] [2023-08-24 13:48:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:48:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:48:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:48:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:54,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:48:54,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079561949] [2023-08-24 13:48:54,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079561949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:48:54,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694042392] [2023-08-24 13:48:54,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:48:54,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:48:54,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:48:54,046 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:48:54,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-24 13:48:54,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:48:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:48:54,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:48:54,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:48:54,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:48:54,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 51 [2023-08-24 13:48:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:54,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:48:54,785 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:48:54,785 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 74 treesize of output 91 [2023-08-24 13:48:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:48:54,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694042392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:48:54,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:48:54,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:48:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149841138] [2023-08-24 13:48:54,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:48:54,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:48:54,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:48:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:48:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:48:54,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:48:54,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 714 transitions, 40207 flow. Second operand has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:54,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:48:54,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:48:54,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:48:58,038 INFO L124 PetriNetUnfolderBase]: 3333/5893 cut-off events. [2023-08-24 13:48:58,038 INFO L125 PetriNetUnfolderBase]: For 1133512/1133512 co-relation queries the response was YES. [2023-08-24 13:48:58,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149731 conditions, 5893 events. 3333/5893 cut-off events. For 1133512/1133512 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 41684 event pairs, 498 based on Foata normal form. 8/5901 useless extension candidates. Maximal degree in co-relation 149617. Up to 2791 conditions per place. [2023-08-24 13:48:58,425 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 263 selfloop transitions, 505 changer transitions 0/768 dead transitions. [2023-08-24 13:48:58,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 768 transitions, 43133 flow [2023-08-24 13:48:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 13:48:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 13:48:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3054 transitions. [2023-08-24 13:48:58,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476775956284153 [2023-08-24 13:48:58,429 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3054 transitions. [2023-08-24 13:48:58,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3054 transitions. [2023-08-24 13:48:58,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:48:58,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3054 transitions. [2023-08-24 13:48:58,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 169.66666666666666) internal successors, (3054), 18 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:58,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:58,439 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:48:58,439 INFO L175 Difference]: Start difference. First operand has 492 places, 714 transitions, 40207 flow. Second operand 18 states and 3054 transitions. [2023-08-24 13:48:58,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 768 transitions, 43133 flow [2023-08-24 13:49:02,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 768 transitions, 42123 flow, removed 8 selfloop flow, removed 16 redundant places. [2023-08-24 13:49:02,146 INFO L231 Difference]: Finished difference. Result has 487 places, 714 transitions, 40507 flow [2023-08-24 13:49:02,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=39152, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=40507, PETRI_PLACES=487, PETRI_TRANSITIONS=714} [2023-08-24 13:49:02,147 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 464 predicate places. [2023-08-24 13:49:02,147 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 714 transitions, 40507 flow [2023-08-24 13:49:02,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:02,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:49:02,148 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:49:02,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-24 13:49:02,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-08-24 13:49:02,348 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:49:02,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:49:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2077540263, now seen corresponding path program 65 times [2023-08-24 13:49:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:49:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366397446] [2023-08-24 13:49:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:49:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:49:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:02,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:49:02,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366397446] [2023-08-24 13:49:02,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366397446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:49:02,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144544477] [2023-08-24 13:49:02,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:49:02,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:49:02,809 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:49:02,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-24 13:49:03,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:49:03,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:49:03,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 13:49:03,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:49:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:03,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:49:03,440 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:49:03,441 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 32 treesize of output 48 [2023-08-24 13:49:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144544477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:49:03,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:49:03,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 24 [2023-08-24 13:49:03,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572933012] [2023-08-24 13:49:03,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:49:03,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 13:49:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:49:03,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 13:49:03,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-24 13:49:03,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:49:03,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 714 transitions, 40507 flow. Second operand has 24 states, 24 states have (on average 167.33333333333334) internal successors, (4016), 24 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:03,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:49:03,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:49:03,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:06,852 INFO L124 PetriNetUnfolderBase]: 3699/6587 cut-off events. [2023-08-24 13:49:06,853 INFO L125 PetriNetUnfolderBase]: For 1197106/1197106 co-relation queries the response was YES. [2023-08-24 13:49:06,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163326 conditions, 6587 events. 3699/6587 cut-off events. For 1197106/1197106 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 47744 event pairs, 440 based on Foata normal form. 40/6627 useless extension candidates. Maximal degree in co-relation 163215. Up to 2619 conditions per place. [2023-08-24 13:49:06,971 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 524 selfloop transitions, 314 changer transitions 0/838 dead transitions. [2023-08-24 13:49:06,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 838 transitions, 47427 flow [2023-08-24 13:49:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:49:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:49:06,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2064 transitions. [2023-08-24 13:49:06,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524590163934426 [2023-08-24 13:49:06,973 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2064 transitions. [2023-08-24 13:49:06,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2064 transitions. [2023-08-24 13:49:06,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:06,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2064 transitions. [2023-08-24 13:49:06,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.0) internal successors, (2064), 12 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:06,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:06,977 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:06,977 INFO L175 Difference]: Start difference. First operand has 487 places, 714 transitions, 40507 flow. Second operand 12 states and 2064 transitions. [2023-08-24 13:49:06,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 838 transitions, 47427 flow [2023-08-24 13:49:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 838 transitions, 46716 flow, removed 13 selfloop flow, removed 13 redundant places. [2023-08-24 13:49:11,186 INFO L231 Difference]: Finished difference. Result has 488 places, 733 transitions, 41346 flow [2023-08-24 13:49:11,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=39861, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=41346, PETRI_PLACES=488, PETRI_TRANSITIONS=733} [2023-08-24 13:49:11,186 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 465 predicate places. [2023-08-24 13:49:11,187 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 733 transitions, 41346 flow [2023-08-24 13:49:11,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 167.33333333333334) internal successors, (4016), 24 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:11,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:49:11,187 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:49:11,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-24 13:49:11,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:11,388 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:49:11,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:49:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 563756831, now seen corresponding path program 66 times [2023-08-24 13:49:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:49:11,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817683904] [2023-08-24 13:49:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:49:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:49:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:11,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:49:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817683904] [2023-08-24 13:49:11,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817683904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:49:11,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578515679] [2023-08-24 13:49:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:49:11,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:11,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:49:11,892 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:49:11,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-24 13:49:12,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:49:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:49:12,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:49:12,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:49:12,429 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:49:12,429 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 65 treesize of output 41 [2023-08-24 13:49:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:12,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:49:12,609 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:49:12,609 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 32 treesize of output 48 [2023-08-24 13:49:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:12,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578515679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:49:12,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:49:12,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:49:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003633092] [2023-08-24 13:49:12,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:49:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:49:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:49:12,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:49:12,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:49:12,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:49:12,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 733 transitions, 41346 flow. Second operand has 21 states, 21 states have (on average 167.04761904761904) internal successors, (3508), 21 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:12,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:49:12,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:49:12,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:15,714 INFO L124 PetriNetUnfolderBase]: 3693/6577 cut-off events. [2023-08-24 13:49:15,714 INFO L125 PetriNetUnfolderBase]: For 1229009/1229009 co-relation queries the response was YES. [2023-08-24 13:49:15,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163217 conditions, 6577 events. 3693/6577 cut-off events. For 1229009/1229009 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 47714 event pairs, 692 based on Foata normal form. 4/6581 useless extension candidates. Maximal degree in co-relation 163103. Up to 3488 conditions per place. [2023-08-24 13:49:15,837 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 515 selfloop transitions, 235 changer transitions 2/752 dead transitions. [2023-08-24 13:49:15,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 752 transitions, 43271 flow [2023-08-24 13:49:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:49:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:49:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1705 transitions. [2023-08-24 13:49:15,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34938524590163933 [2023-08-24 13:49:15,839 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1705 transitions. [2023-08-24 13:49:15,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1705 transitions. [2023-08-24 13:49:15,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:15,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1705 transitions. [2023-08-24 13:49:15,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.5) internal successors, (1705), 10 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:15,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:15,842 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:15,842 INFO L175 Difference]: Start difference. First operand has 488 places, 733 transitions, 41346 flow. Second operand 10 states and 1705 transitions. [2023-08-24 13:49:15,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 752 transitions, 43271 flow [2023-08-24 13:49:20,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 752 transitions, 42963 flow, removed 70 selfloop flow, removed 6 redundant places. [2023-08-24 13:49:20,499 INFO L231 Difference]: Finished difference. Result has 492 places, 731 transitions, 41348 flow [2023-08-24 13:49:20,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=40863, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=41348, PETRI_PLACES=492, PETRI_TRANSITIONS=731} [2023-08-24 13:49:20,500 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 469 predicate places. [2023-08-24 13:49:20,500 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 731 transitions, 41348 flow [2023-08-24 13:49:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.04761904761904) internal successors, (3508), 21 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:49:20,500 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:49:20,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-24 13:49:20,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:20,701 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:49:20,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:49:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1219065049, now seen corresponding path program 67 times [2023-08-24 13:49:20,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:49:20,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009669505] [2023-08-24 13:49:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:49:20,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:49:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:21,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:49:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009669505] [2023-08-24 13:49:21,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009669505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:49:21,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600637003] [2023-08-24 13:49:21,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:49:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:49:21,165 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:49:21,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-24 13:49:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:21,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:49:21,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:49:21,654 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:49:21,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2023-08-24 13:49:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:21,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:49:21,816 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:49:21,816 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 32 treesize of output 48 [2023-08-24 13:49:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:21,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600637003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:49:21,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:49:21,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:49:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505616536] [2023-08-24 13:49:21,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:49:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:49:21,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:49:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:49:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:49:21,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:49:21,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 731 transitions, 41348 flow. Second operand has 19 states, 19 states have (on average 167.26315789473685) internal successors, (3178), 19 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:21,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:49:21,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:49:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:25,338 INFO L124 PetriNetUnfolderBase]: 3801/6757 cut-off events. [2023-08-24 13:49:25,339 INFO L125 PetriNetUnfolderBase]: For 1285917/1285917 co-relation queries the response was YES. [2023-08-24 13:49:25,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168231 conditions, 6757 events. 3801/6757 cut-off events. For 1285917/1285917 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 49222 event pairs, 672 based on Foata normal form. 52/6809 useless extension candidates. Maximal degree in co-relation 168116. Up to 3452 conditions per place. [2023-08-24 13:49:25,465 INFO L140 encePairwiseOnDemand]: 479/488 looper letters, 547 selfloop transitions, 248 changer transitions 0/795 dead transitions. [2023-08-24 13:49:25,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 795 transitions, 45276 flow [2023-08-24 13:49:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:49:25,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:49:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2232 transitions. [2023-08-24 13:49:25,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35182849936948296 [2023-08-24 13:49:25,467 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2232 transitions. [2023-08-24 13:49:25,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2232 transitions. [2023-08-24 13:49:25,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:25,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2232 transitions. [2023-08-24 13:49:25,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 171.69230769230768) internal successors, (2232), 13 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:25,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:25,472 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:25,472 INFO L175 Difference]: Start difference. First operand has 492 places, 731 transitions, 41348 flow. Second operand 13 states and 2232 transitions. [2023-08-24 13:49:25,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 795 transitions, 45276 flow [2023-08-24 13:49:30,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 795 transitions, 44790 flow, removed 8 selfloop flow, removed 8 redundant places. [2023-08-24 13:49:30,100 INFO L231 Difference]: Finished difference. Result has 499 places, 746 transitions, 42214 flow [2023-08-24 13:49:30,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=40868, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=42214, PETRI_PLACES=499, PETRI_TRANSITIONS=746} [2023-08-24 13:49:30,101 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 476 predicate places. [2023-08-24 13:49:30,101 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 746 transitions, 42214 flow [2023-08-24 13:49:30,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.26315789473685) internal successors, (3178), 19 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:30,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:49:30,102 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:49:30,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-24 13:49:30,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:30,302 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:49:30,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:49:30,303 INFO L85 PathProgramCache]: Analyzing trace with hash 779247249, now seen corresponding path program 68 times [2023-08-24 13:49:30,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:49:30,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452577077] [2023-08-24 13:49:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:49:30,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:49:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:30,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:49:30,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452577077] [2023-08-24 13:49:30,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452577077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:49:30,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196508601] [2023-08-24 13:49:30,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:49:30,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:30,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:49:30,821 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:49:30,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-24 13:49:31,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:49:31,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:49:31,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:49:31,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:49:31,291 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:49:31,291 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 46 treesize of output 30 [2023-08-24 13:49:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:31,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:49:31,722 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:49:31,723 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 32 treesize of output 48 [2023-08-24 13:49:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:31,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196508601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:49:31,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:49:31,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2023-08-24 13:49:31,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575037626] [2023-08-24 13:49:31,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:49:31,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 13:49:31,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:49:31,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 13:49:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-08-24 13:49:31,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:49:31,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 746 transitions, 42214 flow. Second operand has 26 states, 26 states have (on average 163.96153846153845) internal successors, (4263), 26 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:31,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:49:31,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:49:31,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:36,725 INFO L124 PetriNetUnfolderBase]: 3983/7083 cut-off events. [2023-08-24 13:49:36,725 INFO L125 PetriNetUnfolderBase]: For 1441743/1441743 co-relation queries the response was YES. [2023-08-24 13:49:36,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176650 conditions, 7083 events. 3983/7083 cut-off events. For 1441743/1441743 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 51941 event pairs, 286 based on Foata normal form. 48/7131 useless extension candidates. Maximal degree in co-relation 176531. Up to 3136 conditions per place. [2023-08-24 13:49:36,856 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 310 selfloop transitions, 530 changer transitions 0/840 dead transitions. [2023-08-24 13:49:36,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 840 transitions, 46969 flow [2023-08-24 13:49:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 13:49:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 13:49:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4520 transitions. [2023-08-24 13:49:36,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3430479659987857 [2023-08-24 13:49:36,859 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4520 transitions. [2023-08-24 13:49:36,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4520 transitions. [2023-08-24 13:49:36,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:36,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4520 transitions. [2023-08-24 13:49:36,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 167.40740740740742) internal successors, (4520), 27 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:36,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 488.0) internal successors, (13664), 28 states have internal predecessors, (13664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:36,867 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 488.0) internal successors, (13664), 28 states have internal predecessors, (13664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:36,867 INFO L175 Difference]: Start difference. First operand has 499 places, 746 transitions, 42214 flow. Second operand 27 states and 4520 transitions. [2023-08-24 13:49:36,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 840 transitions, 46969 flow [2023-08-24 13:49:41,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 840 transitions, 46435 flow, removed 99 selfloop flow, removed 6 redundant places. [2023-08-24 13:49:41,864 INFO L231 Difference]: Finished difference. Result has 530 places, 772 transitions, 45020 flow [2023-08-24 13:49:41,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=41682, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=45020, PETRI_PLACES=530, PETRI_TRANSITIONS=772} [2023-08-24 13:49:41,865 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 507 predicate places. [2023-08-24 13:49:41,865 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 772 transitions, 45020 flow [2023-08-24 13:49:41,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 163.96153846153845) internal successors, (4263), 26 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:41,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:49:41,866 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:49:41,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-24 13:49:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-24 13:49:42,066 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:49:42,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:49:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 684427821, now seen corresponding path program 69 times [2023-08-24 13:49:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:49:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832468561] [2023-08-24 13:49:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:49:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:49:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:42,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:49:42,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832468561] [2023-08-24 13:49:42,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832468561] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:49:42,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760310343] [2023-08-24 13:49:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:49:42,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:42,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:49:42,473 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:49:42,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-24 13:49:42,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:49:42,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:49:42,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:49:42,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:49:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:42,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:49:43,184 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:49:43,185 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 32 treesize of output 48 [2023-08-24 13:49:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:43,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760310343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:49:43,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:49:43,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2023-08-24 13:49:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054692624] [2023-08-24 13:49:43,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:49:43,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 13:49:43,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:49:43,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 13:49:43,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-24 13:49:43,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:49:43,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 772 transitions, 45020 flow. Second operand has 19 states, 19 states have (on average 167.31578947368422) internal successors, (3179), 19 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:43,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:49:43,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:49:43,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:46,751 INFO L124 PetriNetUnfolderBase]: 4055/7207 cut-off events. [2023-08-24 13:49:46,751 INFO L125 PetriNetUnfolderBase]: For 1472978/1472978 co-relation queries the response was YES. [2023-08-24 13:49:46,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184635 conditions, 7207 events. 4055/7207 cut-off events. For 1472978/1472978 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 53073 event pairs, 1447 based on Foata normal form. 36/7243 useless extension candidates. Maximal degree in co-relation 184505. Up to 6447 conditions per place. [2023-08-24 13:49:46,892 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 677 selfloop transitions, 132 changer transitions 0/809 dead transitions. [2023-08-24 13:49:46,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 809 transitions, 48021 flow [2023-08-24 13:49:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:49:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:49:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1709 transitions. [2023-08-24 13:49:46,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35020491803278686 [2023-08-24 13:49:46,894 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1709 transitions. [2023-08-24 13:49:46,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1709 transitions. [2023-08-24 13:49:46,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:46,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1709 transitions. [2023-08-24 13:49:46,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.9) internal successors, (1709), 10 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:46,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:46,897 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:46,897 INFO L175 Difference]: Start difference. First operand has 530 places, 772 transitions, 45020 flow. Second operand 10 states and 1709 transitions. [2023-08-24 13:49:46,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 809 transitions, 48021 flow [2023-08-24 13:49:53,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 809 transitions, 47236 flow, removed 239 selfloop flow, removed 10 redundant places. [2023-08-24 13:49:53,435 INFO L231 Difference]: Finished difference. Result has 531 places, 781 transitions, 44901 flow [2023-08-24 13:49:53,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=44235, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=44901, PETRI_PLACES=531, PETRI_TRANSITIONS=781} [2023-08-24 13:49:53,436 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 508 predicate places. [2023-08-24 13:49:53,436 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 781 transitions, 44901 flow [2023-08-24 13:49:53,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.31578947368422) internal successors, (3179), 19 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:53,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:49:53,436 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:49:53,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-24 13:49:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:53,637 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:49:53,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:49:53,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2113875109, now seen corresponding path program 70 times [2023-08-24 13:49:53,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:49:53,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723356386] [2023-08-24 13:49:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:49:53,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:49:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:49:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:54,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:49:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723356386] [2023-08-24 13:49:54,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723356386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:49:54,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035831252] [2023-08-24 13:49:54,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:49:54,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:49:54,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:49:54,129 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:49:54,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-24 13:49:54,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:49:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:49:54,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:49:54,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:49:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:54,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:49:54,775 INFO L322 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-08-24 13:49:54,775 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 32 treesize of output 48 [2023-08-24 13:49:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:49:54,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035831252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:49:54,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:49:54,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:49:54,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014621429] [2023-08-24 13:49:54,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:49:54,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:49:54,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:49:54,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:49:54,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:49:54,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:49:54,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 781 transitions, 44901 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:54,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:49:54,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:49:54,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:49:58,338 INFO L124 PetriNetUnfolderBase]: 4045/7177 cut-off events. [2023-08-24 13:49:58,338 INFO L125 PetriNetUnfolderBase]: For 1466080/1466080 co-relation queries the response was YES. [2023-08-24 13:49:58,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182551 conditions, 7177 events. 4045/7177 cut-off events. For 1466080/1466080 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 52737 event pairs, 1484 based on Foata normal form. 4/7181 useless extension candidates. Maximal degree in co-relation 182420. Up to 6525 conditions per place. [2023-08-24 13:49:58,476 INFO L140 encePairwiseOnDemand]: 480/488 looper letters, 675 selfloop transitions, 116 changer transitions 4/795 dead transitions. [2023-08-24 13:49:58,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 795 transitions, 46886 flow [2023-08-24 13:49:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:49:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:49:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1531 transitions. [2023-08-24 13:49:58,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34858834244080145 [2023-08-24 13:49:58,477 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1531 transitions. [2023-08-24 13:49:58,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1531 transitions. [2023-08-24 13:49:58,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:49:58,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1531 transitions. [2023-08-24 13:49:58,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.11111111111111) internal successors, (1531), 9 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:58,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:58,480 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:49:58,480 INFO L175 Difference]: Start difference. First operand has 531 places, 781 transitions, 44901 flow. Second operand 9 states and 1531 transitions. [2023-08-24 13:49:58,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 795 transitions, 46886 flow [2023-08-24 13:50:04,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 795 transitions, 46482 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-24 13:50:04,102 INFO L231 Difference]: Finished difference. Result has 534 places, 779 transitions, 44651 flow [2023-08-24 13:50:04,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=44497, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=44651, PETRI_PLACES=534, PETRI_TRANSITIONS=779} [2023-08-24 13:50:04,103 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 511 predicate places. [2023-08-24 13:50:04,103 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 779 transitions, 44651 flow [2023-08-24 13:50:04,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:04,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:04,104 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:04,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-24 13:50:04,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:04,310 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:04,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1151347033, now seen corresponding path program 71 times [2023-08-24 13:50:04,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:04,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542919898] [2023-08-24 13:50:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:04,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:04,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542919898] [2023-08-24 13:50:04,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542919898] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:50:04,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806623910] [2023-08-24 13:50:04,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:50:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:04,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:04,737 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:50:04,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-24 13:50:05,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:50:05,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:50:05,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 13:50:05,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:50:05,308 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:50:05,308 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 25 treesize of output 9 [2023-08-24 13:50:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:05,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:50:05,599 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:50:05,599 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 20 treesize of output 4 [2023-08-24 13:50:05,634 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:50:05,635 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 40 treesize of output 56 [2023-08-24 13:50:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:05,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806623910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:50:05,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:50:05,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2023-08-24 13:50:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70156777] [2023-08-24 13:50:05,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:50:05,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 13:50:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:05,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 13:50:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-08-24 13:50:05,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:50:05,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 779 transitions, 44651 flow. Second operand has 25 states, 25 states have (on average 164.04) internal successors, (4101), 25 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:05,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:05,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:50:05,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:09,775 INFO L124 PetriNetUnfolderBase]: 4091/7255 cut-off events. [2023-08-24 13:50:09,776 INFO L125 PetriNetUnfolderBase]: For 1440206/1440206 co-relation queries the response was YES. [2023-08-24 13:50:09,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183862 conditions, 7255 events. 4091/7255 cut-off events. For 1440206/1440206 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 53332 event pairs, 298 based on Foata normal form. 32/7287 useless extension candidates. Maximal degree in co-relation 183730. Up to 5022 conditions per place. [2023-08-24 13:50:10,027 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 351 selfloop transitions, 484 changer transitions 0/835 dead transitions. [2023-08-24 13:50:10,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 835 transitions, 47902 flow [2023-08-24 13:50:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 13:50:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 13:50:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3010 transitions. [2023-08-24 13:50:10,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34266848816029144 [2023-08-24 13:50:10,030 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3010 transitions. [2023-08-24 13:50:10,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3010 transitions. [2023-08-24 13:50:10,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:10,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3010 transitions. [2023-08-24 13:50:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 167.22222222222223) internal successors, (3010), 18 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:10,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:10,037 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 488.0) internal successors, (9272), 19 states have internal predecessors, (9272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:10,037 INFO L175 Difference]: Start difference. First operand has 534 places, 779 transitions, 44651 flow. Second operand 18 states and 3010 transitions. [2023-08-24 13:50:10,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 835 transitions, 47902 flow [2023-08-24 13:50:15,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 835 transitions, 47655 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-24 13:50:15,812 INFO L231 Difference]: Finished difference. Result has 545 places, 798 transitions, 46737 flow [2023-08-24 13:50:15,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=44315, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=46737, PETRI_PLACES=545, PETRI_TRANSITIONS=798} [2023-08-24 13:50:15,813 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 522 predicate places. [2023-08-24 13:50:15,813 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 798 transitions, 46737 flow [2023-08-24 13:50:15,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 164.04) internal successors, (4101), 25 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:15,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:15,814 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:15,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-24 13:50:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-24 13:50:16,014 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:16,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1183152455, now seen corresponding path program 72 times [2023-08-24 13:50:16,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:16,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784873083] [2023-08-24 13:50:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:16,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784873083] [2023-08-24 13:50:16,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784873083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:50:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700569103] [2023-08-24 13:50:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:50:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:16,450 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:50:16,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-24 13:50:16,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:50:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:50:16,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:50:16,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:50:17,036 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:50:17,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-24 13:50:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:17,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:50:17,178 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:50:17,178 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 71 treesize of output 88 [2023-08-24 13:50:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:17,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700569103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:50:17,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:50:17,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:50:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713761810] [2023-08-24 13:50:17,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:50:17,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:50:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:50:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:50:17,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:50:17,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 798 transitions, 46737 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:17,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:17,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:50:17,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:21,146 INFO L124 PetriNetUnfolderBase]: 4089/7259 cut-off events. [2023-08-24 13:50:21,146 INFO L125 PetriNetUnfolderBase]: For 1517968/1517968 co-relation queries the response was YES. [2023-08-24 13:50:21,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187385 conditions, 7259 events. 4089/7259 cut-off events. For 1517968/1517968 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 53527 event pairs, 1496 based on Foata normal form. 4/7263 useless extension candidates. Maximal degree in co-relation 187249. Up to 6611 conditions per place. [2023-08-24 13:50:21,290 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 690 selfloop transitions, 119 changer transitions 5/814 dead transitions. [2023-08-24 13:50:21,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 814 transitions, 48825 flow [2023-08-24 13:50:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:50:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:50:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1529 transitions. [2023-08-24 13:50:21,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481329690346084 [2023-08-24 13:50:21,291 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1529 transitions. [2023-08-24 13:50:21,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1529 transitions. [2023-08-24 13:50:21,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:21,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1529 transitions. [2023-08-24 13:50:21,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.88888888888889) internal successors, (1529), 9 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:21,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:21,294 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:21,294 INFO L175 Difference]: Start difference. First operand has 545 places, 798 transitions, 46737 flow. Second operand 9 states and 1529 transitions. [2023-08-24 13:50:21,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 814 transitions, 48825 flow [2023-08-24 13:50:27,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 814 transitions, 47992 flow, removed 143 selfloop flow, removed 8 redundant places. [2023-08-24 13:50:27,388 INFO L231 Difference]: Finished difference. Result has 547 places, 799 transitions, 46200 flow [2023-08-24 13:50:27,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=45905, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=46200, PETRI_PLACES=547, PETRI_TRANSITIONS=799} [2023-08-24 13:50:27,389 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 524 predicate places. [2023-08-24 13:50:27,389 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 799 transitions, 46200 flow [2023-08-24 13:50:27,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:27,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:27,389 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:27,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-08-24 13:50:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:27,590 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:27,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:27,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1840388995, now seen corresponding path program 73 times [2023-08-24 13:50:27,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:27,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878305160] [2023-08-24 13:50:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:27,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:28,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:28,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878305160] [2023-08-24 13:50:28,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878305160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:50:28,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30504379] [2023-08-24 13:50:28,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:50:28,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:28,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:28,050 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:50:28,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-24 13:50:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:28,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:50:28,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:50:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:28,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:50:28,811 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:50:28,812 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 71 treesize of output 88 [2023-08-24 13:50:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30504379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:50:28,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:50:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:50:28,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656623856] [2023-08-24 13:50:28,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:50:28,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:50:28,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:50:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:50:28,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:50:28,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 799 transitions, 46200 flow. Second operand has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:28,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:28,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:50:28,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:32,746 INFO L124 PetriNetUnfolderBase]: 4071/7219 cut-off events. [2023-08-24 13:50:32,746 INFO L125 PetriNetUnfolderBase]: For 1484530/1484530 co-relation queries the response was YES. [2023-08-24 13:50:32,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184316 conditions, 7219 events. 4071/7219 cut-off events. For 1484530/1484530 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 53033 event pairs, 1494 based on Foata normal form. 4/7223 useless extension candidates. Maximal degree in co-relation 184178. Up to 6579 conditions per place. [2023-08-24 13:50:32,887 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 690 selfloop transitions, 115 changer transitions 5/810 dead transitions. [2023-08-24 13:50:32,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 810 transitions, 48063 flow [2023-08-24 13:50:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:50:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:50:32,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1530 transitions. [2023-08-24 13:50:32,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483606557377049 [2023-08-24 13:50:32,888 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1530 transitions. [2023-08-24 13:50:32,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1530 transitions. [2023-08-24 13:50:32,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:32,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1530 transitions. [2023-08-24 13:50:32,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:32,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:32,891 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:32,891 INFO L175 Difference]: Start difference. First operand has 547 places, 799 transitions, 46200 flow. Second operand 9 states and 1530 transitions. [2023-08-24 13:50:32,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 810 transitions, 48063 flow [2023-08-24 13:50:38,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 810 transitions, 47715 flow, removed 69 selfloop flow, removed 6 redundant places. [2023-08-24 13:50:38,827 INFO L231 Difference]: Finished difference. Result has 548 places, 796 transitions, 45986 flow [2023-08-24 13:50:38,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=45854, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=45986, PETRI_PLACES=548, PETRI_TRANSITIONS=796} [2023-08-24 13:50:38,828 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 525 predicate places. [2023-08-24 13:50:38,828 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 796 transitions, 45986 flow [2023-08-24 13:50:38,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:38,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:38,829 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:38,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-08-24 13:50:39,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:39,029 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:39,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:39,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1098614793, now seen corresponding path program 74 times [2023-08-24 13:50:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:39,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136050258] [2023-08-24 13:50:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:39,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:39,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136050258] [2023-08-24 13:50:39,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136050258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:50:39,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089351373] [2023-08-24 13:50:39,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:50:39,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:39,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:39,537 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:50:39,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-24 13:50:39,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:50:39,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:50:39,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:50:39,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:50:40,020 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:50:40,020 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 59 treesize of output 35 [2023-08-24 13:50:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:40,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:50:40,252 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:50:40,253 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 71 treesize of output 88 [2023-08-24 13:50:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089351373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:50:40,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:50:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-24 13:50:40,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546324802] [2023-08-24 13:50:40,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:50:40,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:50:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:40,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:50:40,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:50:40,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:50:40,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 796 transitions, 45986 flow. Second operand has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:40,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:40,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:50:40,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:44,278 INFO L124 PetriNetUnfolderBase]: 4055/7157 cut-off events. [2023-08-24 13:50:44,278 INFO L125 PetriNetUnfolderBase]: For 1475850/1475850 co-relation queries the response was YES. [2023-08-24 13:50:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183534 conditions, 7157 events. 4055/7157 cut-off events. For 1475850/1475850 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 52258 event pairs, 1458 based on Foata normal form. 36/7193 useless extension candidates. Maximal degree in co-relation 183396. Up to 6469 conditions per place. [2023-08-24 13:50:44,418 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 684 selfloop transitions, 123 changer transitions 0/807 dead transitions. [2023-08-24 13:50:44,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 807 transitions, 47871 flow [2023-08-24 13:50:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:50:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:50:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1705 transitions. [2023-08-24 13:50:44,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34938524590163933 [2023-08-24 13:50:44,419 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1705 transitions. [2023-08-24 13:50:44,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1705 transitions. [2023-08-24 13:50:44,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:44,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1705 transitions. [2023-08-24 13:50:44,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.5) internal successors, (1705), 10 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:44,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:44,423 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:44,423 INFO L175 Difference]: Start difference. First operand has 548 places, 796 transitions, 45986 flow. Second operand 10 states and 1705 transitions. [2023-08-24 13:50:44,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 807 transitions, 47871 flow [2023-08-24 13:50:50,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 807 transitions, 47630 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-24 13:50:50,197 INFO L231 Difference]: Finished difference. Result has 546 places, 790 transitions, 45811 flow [2023-08-24 13:50:50,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=45424, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=45811, PETRI_PLACES=546, PETRI_TRANSITIONS=790} [2023-08-24 13:50:50,198 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 523 predicate places. [2023-08-24 13:50:50,198 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 790 transitions, 45811 flow [2023-08-24 13:50:50,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:50,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:50,198 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:50,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-24 13:50:50,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:50,399 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:50,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash 168797231, now seen corresponding path program 75 times [2023-08-24 13:50:50,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:50,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175516740] [2023-08-24 13:50:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:50:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175516740] [2023-08-24 13:50:51,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175516740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:50:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898261499] [2023-08-24 13:50:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:50:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:50:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:51,209 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:50:51,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-24 13:50:51,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:50:51,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:50:51,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:50:51,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:50:51,866 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:50:51,866 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 46 treesize of output 30 [2023-08-24 13:50:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:51,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:50:52,161 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:50:52,162 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 20 treesize of output 4 [2023-08-24 13:50:52,197 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:50:52,197 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 40 treesize of output 56 [2023-08-24 13:50:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:50:52,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898261499] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:50:52,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:50:52,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 10] total 32 [2023-08-24 13:50:52,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975776147] [2023-08-24 13:50:52,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:50:52,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:50:52,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:52,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:50:52,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2023-08-24 13:50:52,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 488 [2023-08-24 13:50:52,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 790 transitions, 45811 flow. Second operand has 32 states, 32 states have (on average 144.78125) internal successors, (4633), 32 states have internal predecessors, (4633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:52,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:52,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 488 [2023-08-24 13:50:52,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:57,729 INFO L124 PetriNetUnfolderBase]: 4157/7379 cut-off events. [2023-08-24 13:50:57,730 INFO L125 PetriNetUnfolderBase]: For 1482716/1482716 co-relation queries the response was YES. [2023-08-24 13:50:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187991 conditions, 7379 events. 4157/7379 cut-off events. For 1482716/1482716 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 54431 event pairs, 680 based on Foata normal form. 36/7415 useless extension candidates. Maximal degree in co-relation 187854. Up to 3752 conditions per place. [2023-08-24 13:50:57,872 INFO L140 encePairwiseOnDemand]: 476/488 looper letters, 400 selfloop transitions, 484 changer transitions 1/885 dead transitions. [2023-08-24 13:50:57,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 885 transitions, 50231 flow [2023-08-24 13:50:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 13:50:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 13:50:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4715 transitions. [2023-08-24 13:50:57,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30193391393442626 [2023-08-24 13:50:57,875 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4715 transitions. [2023-08-24 13:50:57,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4715 transitions. [2023-08-24 13:50:57,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:57,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4715 transitions. [2023-08-24 13:50:57,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 147.34375) internal successors, (4715), 32 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:57,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 488.0) internal successors, (16104), 33 states have internal predecessors, (16104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:57,884 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 488.0) internal successors, (16104), 33 states have internal predecessors, (16104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:57,884 INFO L175 Difference]: Start difference. First operand has 546 places, 790 transitions, 45811 flow. Second operand 32 states and 4715 transitions. [2023-08-24 13:50:57,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 885 transitions, 50231 flow [2023-08-24 13:51:04,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 885 transitions, 49910 flow, removed 40 selfloop flow, removed 8 redundant places. [2023-08-24 13:51:04,170 INFO L231 Difference]: Finished difference. Result has 575 places, 813 transitions, 48158 flow [2023-08-24 13:51:04,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=45482, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=789, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=48158, PETRI_PLACES=575, PETRI_TRANSITIONS=813} [2023-08-24 13:51:04,170 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 552 predicate places. [2023-08-24 13:51:04,170 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 813 transitions, 48158 flow [2023-08-24 13:51:04,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 144.78125) internal successors, (4633), 32 states have internal predecessors, (4633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:04,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:51:04,171 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:51:04,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-08-24 13:51:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-08-24 13:51:04,372 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:51:04,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:51:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1302275459, now seen corresponding path program 76 times [2023-08-24 13:51:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:51:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438651262] [2023-08-24 13:51:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:51:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:51:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:51:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:04,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:51:04,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438651262] [2023-08-24 13:51:04,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438651262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:51:04,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466833350] [2023-08-24 13:51:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:51:04,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:04,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:51:04,905 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:51:04,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-24 13:51:05,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:51:05,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:51:05,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:51:05,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:51:05,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:51:05,376 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 46 treesize of output 30 [2023-08-24 13:51:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:05,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:51:05,558 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:51:05,559 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 20 treesize of output 4 [2023-08-24 13:51:05,594 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:51:05,594 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 40 treesize of output 56 [2023-08-24 13:51:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:05,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466833350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:51:05,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:51:05,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-24 13:51:05,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039358181] [2023-08-24 13:51:05,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:51:05,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:51:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:51:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:51:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:51:05,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:51:05,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 813 transitions, 48158 flow. Second operand has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:05,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:51:05,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:51:05,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:51:09,759 INFO L124 PetriNetUnfolderBase]: 4181/7439 cut-off events. [2023-08-24 13:51:09,759 INFO L125 PetriNetUnfolderBase]: For 1561721/1561721 co-relation queries the response was YES. [2023-08-24 13:51:09,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193077 conditions, 7439 events. 4181/7439 cut-off events. For 1561721/1561721 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 55163 event pairs, 1528 based on Foata normal form. 20/7459 useless extension candidates. Maximal degree in co-relation 192934. Up to 6717 conditions per place. [2023-08-24 13:51:09,911 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 714 selfloop transitions, 118 changer transitions 1/833 dead transitions. [2023-08-24 13:51:09,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 833 transitions, 50453 flow [2023-08-24 13:51:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:51:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:51:09,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1707 transitions. [2023-08-24 13:51:09,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497950819672131 [2023-08-24 13:51:09,913 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1707 transitions. [2023-08-24 13:51:09,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1707 transitions. [2023-08-24 13:51:09,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:51:09,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1707 transitions. [2023-08-24 13:51:09,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.7) internal successors, (1707), 10 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:09,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:09,916 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:09,916 INFO L175 Difference]: Start difference. First operand has 575 places, 813 transitions, 48158 flow. Second operand 10 states and 1707 transitions. [2023-08-24 13:51:09,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 833 transitions, 50453 flow [2023-08-24 13:51:16,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 833 transitions, 49010 flow, removed 211 selfloop flow, removed 18 redundant places. [2023-08-24 13:51:16,761 INFO L231 Difference]: Finished difference. Result has 567 places, 814 transitions, 47095 flow [2023-08-24 13:51:16,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=46712, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=47095, PETRI_PLACES=567, PETRI_TRANSITIONS=814} [2023-08-24 13:51:16,761 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 544 predicate places. [2023-08-24 13:51:16,762 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 814 transitions, 47095 flow [2023-08-24 13:51:16,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.2) internal successors, (3344), 20 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:16,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:51:16,762 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:51:16,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-24 13:51:16,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:16,963 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:51:16,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:51:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1826651511, now seen corresponding path program 77 times [2023-08-24 13:51:16,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:51:16,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6759593] [2023-08-24 13:51:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:51:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:51:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:51:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-24 13:51:17,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:51:17,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6759593] [2023-08-24 13:51:17,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6759593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:51:17,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709331852] [2023-08-24 13:51:17,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:51:17,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:17,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:51:17,832 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:51:17,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-24 13:51:18,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:51:18,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:51:18,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 13:51:18,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:51:18,393 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:51:18,394 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 65 treesize of output 45 [2023-08-24 13:51:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:18,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:51:18,605 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:51:18,605 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 40 treesize of output 56 [2023-08-24 13:51:18,618 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:51:18,618 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 20 treesize of output 4 [2023-08-24 13:51:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709331852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:51:18,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:51:18,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 8] total 32 [2023-08-24 13:51:18,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146825030] [2023-08-24 13:51:18,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:51:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 13:51:18,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:51:18,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 13:51:18,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2023-08-24 13:51:18,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 488 [2023-08-24 13:51:18,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 814 transitions, 47095 flow. Second operand has 32 states, 32 states have (on average 138.8125) internal successors, (4442), 32 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:18,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:51:18,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 488 [2023-08-24 13:51:18,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:51:23,479 INFO L124 PetriNetUnfolderBase]: 4163/7377 cut-off events. [2023-08-24 13:51:23,480 INFO L125 PetriNetUnfolderBase]: For 1521962/1521962 co-relation queries the response was YES. [2023-08-24 13:51:23,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188186 conditions, 7377 events. 4163/7377 cut-off events. For 1521962/1521962 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 54386 event pairs, 1526 based on Foata normal form. 4/7381 useless extension candidates. Maximal degree in co-relation 188043. Up to 3350 conditions per place. [2023-08-24 13:51:23,631 INFO L140 encePairwiseOnDemand]: 477/488 looper letters, 1201 selfloop transitions, 168 changer transitions 4/1373 dead transitions. [2023-08-24 13:51:23,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1373 transitions, 85507 flow [2023-08-24 13:51:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 13:51:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 13:51:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3115 transitions. [2023-08-24 13:51:23,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29014530551415796 [2023-08-24 13:51:23,634 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3115 transitions. [2023-08-24 13:51:23,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3115 transitions. [2023-08-24 13:51:23,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:51:23,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3115 transitions. [2023-08-24 13:51:23,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 141.5909090909091) internal successors, (3115), 22 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:23,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 488.0) internal successors, (11224), 23 states have internal predecessors, (11224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:23,641 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 488.0) internal successors, (11224), 23 states have internal predecessors, (11224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:23,641 INFO L175 Difference]: Start difference. First operand has 567 places, 814 transitions, 47095 flow. Second operand 22 states and 3115 transitions. [2023-08-24 13:51:23,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1373 transitions, 85507 flow [2023-08-24 13:51:30,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1373 transitions, 85051 flow, removed 82 selfloop flow, removed 7 redundant places. [2023-08-24 13:51:30,137 INFO L231 Difference]: Finished difference. Result has 577 places, 841 transitions, 48661 flow [2023-08-24 13:51:30,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=46237, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48661, PETRI_PLACES=577, PETRI_TRANSITIONS=841} [2023-08-24 13:51:30,137 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 554 predicate places. [2023-08-24 13:51:30,138 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 841 transitions, 48661 flow [2023-08-24 13:51:30,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 138.8125) internal successors, (4442), 32 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:30,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:51:30,138 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:51:30,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-24 13:51:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:30,339 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:51:30,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:51:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash 560501257, now seen corresponding path program 78 times [2023-08-24 13:51:30,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:51:30,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195839705] [2023-08-24 13:51:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:51:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:51:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:51:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:30,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:51:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195839705] [2023-08-24 13:51:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195839705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:51:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170763914] [2023-08-24 13:51:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:51:30,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:30,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:51:30,808 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:51:30,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-24 13:51:31,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:51:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:51:31,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 13:51:31,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:51:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:31,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:51:31,687 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:51:31,688 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 20 treesize of output 4 [2023-08-24 13:51:31,729 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:51:31,729 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 40 treesize of output 56 [2023-08-24 13:51:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:31,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170763914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:51:31,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:51:31,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:51:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949061748] [2023-08-24 13:51:31,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:51:31,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:51:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:51:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:51:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:51:31,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:51:31,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 841 transitions, 48661 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:31,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:51:31,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:51:31,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:51:35,925 INFO L124 PetriNetUnfolderBase]: 4155/7361 cut-off events. [2023-08-24 13:51:35,925 INFO L125 PetriNetUnfolderBase]: For 1506806/1506806 co-relation queries the response was YES. [2023-08-24 13:51:36,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187405 conditions, 7361 events. 4155/7361 cut-off events. For 1506806/1506806 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 54209 event pairs, 1526 based on Foata normal form. 4/7365 useless extension candidates. Maximal degree in co-relation 187262. Up to 6729 conditions per place. [2023-08-24 13:51:36,074 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 710 selfloop transitions, 136 changer transitions 6/852 dead transitions. [2023-08-24 13:51:36,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 852 transitions, 50634 flow [2023-08-24 13:51:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:51:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:51:36,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1528 transitions. [2023-08-24 13:51:36,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34790528233151186 [2023-08-24 13:51:36,075 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1528 transitions. [2023-08-24 13:51:36,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1528 transitions. [2023-08-24 13:51:36,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:51:36,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1528 transitions. [2023-08-24 13:51:36,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.77777777777777) internal successors, (1528), 9 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:36,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:36,078 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:36,078 INFO L175 Difference]: Start difference. First operand has 577 places, 841 transitions, 48661 flow. Second operand 9 states and 1528 transitions. [2023-08-24 13:51:36,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 852 transitions, 50634 flow [2023-08-24 13:51:42,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 852 transitions, 50598 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 13:51:42,097 INFO L231 Difference]: Finished difference. Result has 575 places, 838 transitions, 48736 flow [2023-08-24 13:51:42,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=48625, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=48736, PETRI_PLACES=575, PETRI_TRANSITIONS=838} [2023-08-24 13:51:42,098 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 552 predicate places. [2023-08-24 13:51:42,098 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 838 transitions, 48736 flow [2023-08-24 13:51:42,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:42,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:51:42,098 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:51:42,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-08-24 13:51:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2023-08-24 13:51:42,299 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:51:42,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:51:42,299 INFO L85 PathProgramCache]: Analyzing trace with hash -693173283, now seen corresponding path program 79 times [2023-08-24 13:51:42,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:51:42,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812399571] [2023-08-24 13:51:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:51:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:51:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:51:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:42,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:51:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812399571] [2023-08-24 13:51:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812399571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:51:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205997411] [2023-08-24 13:51:42,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:51:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:51:42,761 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:51:42,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-24 13:51:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:51:43,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:51:43,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:51:43,238 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:51:43,239 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 46 treesize of output 30 [2023-08-24 13:51:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:43,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:51:43,411 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:51:43,411 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 20 treesize of output 4 [2023-08-24 13:51:43,445 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:51:43,446 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 40 treesize of output 56 [2023-08-24 13:51:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205997411] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:51:43,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:51:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:51:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98869470] [2023-08-24 13:51:43,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:51:43,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:51:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:51:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:51:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:51:43,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:51:43,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 838 transitions, 48736 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:43,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:51:43,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:51:43,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:51:47,476 INFO L124 PetriNetUnfolderBase]: 4137/7307 cut-off events. [2023-08-24 13:51:47,476 INFO L125 PetriNetUnfolderBase]: For 1515190/1515190 co-relation queries the response was YES. [2023-08-24 13:51:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186594 conditions, 7307 events. 4137/7307 cut-off events. For 1515190/1515190 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 53498 event pairs, 1512 based on Foata normal form. 4/7311 useless extension candidates. Maximal degree in co-relation 186450. Up to 6649 conditions per place. [2023-08-24 13:51:47,629 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 708 selfloop transitions, 144 changer transitions 2/854 dead transitions. [2023-08-24 13:51:47,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 854 transitions, 50739 flow [2023-08-24 13:51:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:51:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:51:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2036 transitions. [2023-08-24 13:51:47,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476775956284153 [2023-08-24 13:51:47,630 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2036 transitions. [2023-08-24 13:51:47,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2036 transitions. [2023-08-24 13:51:47,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:51:47,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2036 transitions. [2023-08-24 13:51:47,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.66666666666666) internal successors, (2036), 12 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:47,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:47,634 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:47,635 INFO L175 Difference]: Start difference. First operand has 575 places, 838 transitions, 48736 flow. Second operand 12 states and 2036 transitions. [2023-08-24 13:51:47,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 854 transitions, 50739 flow [2023-08-24 13:51:53,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 854 transitions, 50416 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-24 13:51:53,855 INFO L231 Difference]: Finished difference. Result has 576 places, 837 transitions, 48689 flow [2023-08-24 13:51:53,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=48217, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=48689, PETRI_PLACES=576, PETRI_TRANSITIONS=837} [2023-08-24 13:51:53,856 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 553 predicate places. [2023-08-24 13:51:53,856 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 837 transitions, 48689 flow [2023-08-24 13:51:53,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:53,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:51:53,857 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:51:53,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-24 13:51:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:54,057 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:51:54,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:51:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash -658452555, now seen corresponding path program 80 times [2023-08-24 13:51:54,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:51:54,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248300262] [2023-08-24 13:51:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:51:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:51:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:51:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:54,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:51:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248300262] [2023-08-24 13:51:54,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248300262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:51:54,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876985359] [2023-08-24 13:51:54,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:51:54,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:51:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:51:54,623 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:51:54,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-24 13:51:55,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:51:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:51:55,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:51:55,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:51:55,152 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:51:55,152 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 46 treesize of output 30 [2023-08-24 13:51:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:55,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:51:55,355 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:51:55,356 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 71 treesize of output 88 [2023-08-24 13:51:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:51:55,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876985359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:51:55,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:51:55,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2023-08-24 13:51:55,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684187888] [2023-08-24 13:51:55,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:51:55,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:51:55,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:51:55,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:51:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:51:55,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:51:55,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 837 transitions, 48689 flow. Second operand has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:55,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:51:55,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:51:55,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:51:59,615 INFO L124 PetriNetUnfolderBase]: 4159/7361 cut-off events. [2023-08-24 13:51:59,615 INFO L125 PetriNetUnfolderBase]: For 1463441/1463441 co-relation queries the response was YES. [2023-08-24 13:51:59,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188130 conditions, 7361 events. 4159/7361 cut-off events. For 1463441/1463441 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 53959 event pairs, 1553 based on Foata normal form. 20/7381 useless extension candidates. Maximal degree in co-relation 187986. Up to 6781 conditions per place. [2023-08-24 13:51:59,774 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 680 selfloop transitions, 179 changer transitions 0/859 dead transitions. [2023-08-24 13:51:59,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 859 transitions, 50999 flow [2023-08-24 13:51:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:51:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:51:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1709 transitions. [2023-08-24 13:51:59,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35020491803278686 [2023-08-24 13:51:59,776 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1709 transitions. [2023-08-24 13:51:59,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1709 transitions. [2023-08-24 13:51:59,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:51:59,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1709 transitions. [2023-08-24 13:51:59,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.9) internal successors, (1709), 10 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:59,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:59,780 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:51:59,780 INFO L175 Difference]: Start difference. First operand has 576 places, 837 transitions, 48689 flow. Second operand 10 states and 1709 transitions. [2023-08-24 13:51:59,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 859 transitions, 50999 flow [2023-08-24 13:52:05,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 859 transitions, 50685 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-24 13:52:05,983 INFO L231 Difference]: Finished difference. Result has 573 places, 837 transitions, 48862 flow [2023-08-24 13:52:05,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=48351, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=835, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=48862, PETRI_PLACES=573, PETRI_TRANSITIONS=837} [2023-08-24 13:52:05,984 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 550 predicate places. [2023-08-24 13:52:05,984 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 837 transitions, 48862 flow [2023-08-24 13:52:05,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.0952380952381) internal successors, (3509), 21 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:05,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:52:05,985 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:52:05,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-24 13:52:06,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:06,185 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:52:06,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:52:06,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1531422137, now seen corresponding path program 81 times [2023-08-24 13:52:06,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:52:06,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351843131] [2023-08-24 13:52:06,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:52:06,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:52:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:52:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:06,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:52:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351843131] [2023-08-24 13:52:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351843131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:52:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419204740] [2023-08-24 13:52:06,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:52:06,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:06,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:52:06,675 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:52:06,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-24 13:52:07,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:52:07,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:52:07,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:52:07,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:52:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:52:07,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:52:07,292 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:52:07,293 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 55 treesize of output 23 [2023-08-24 13:52:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:07,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:52:07,430 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6067 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_6067))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-08-24 13:52:07,473 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-24 13:52:07,474 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 114 treesize of output 127 [2023-08-24 13:52:07,490 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:52:07,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-08-24 13:52:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419204740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:52:07,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:52:07,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-24 13:52:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026599641] [2023-08-24 13:52:07,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:52:07,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 13:52:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:52:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 13:52:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=603, Unknown=1, NotChecked=50, Total=756 [2023-08-24 13:52:07,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 488 [2023-08-24 13:52:07,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 837 transitions, 48862 flow. Second operand has 28 states, 28 states have (on average 162.89285714285714) internal successors, (4561), 28 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:07,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:52:07,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 488 [2023-08-24 13:52:07,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:52:12,318 INFO L124 PetriNetUnfolderBase]: 4469/7925 cut-off events. [2023-08-24 13:52:12,319 INFO L125 PetriNetUnfolderBase]: For 1560230/1560230 co-relation queries the response was YES. [2023-08-24 13:52:12,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200773 conditions, 7925 events. 4469/7925 cut-off events. For 1560230/1560230 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 59067 event pairs, 366 based on Foata normal form. 40/7965 useless extension candidates. Maximal degree in co-relation 200628. Up to 3326 conditions per place. [2023-08-24 13:52:12,604 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 543 selfloop transitions, 403 changer transitions 0/946 dead transitions. [2023-08-24 13:52:12,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 946 transitions, 55701 flow [2023-08-24 13:52:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:52:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:52:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2337 transitions. [2023-08-24 13:52:12,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34206674473067916 [2023-08-24 13:52:12,606 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2337 transitions. [2023-08-24 13:52:12,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2337 transitions. [2023-08-24 13:52:12,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:52:12,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2337 transitions. [2023-08-24 13:52:12,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 166.92857142857142) internal successors, (2337), 14 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:12,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:12,611 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:12,611 INFO L175 Difference]: Start difference. First operand has 573 places, 837 transitions, 48862 flow. Second operand 14 states and 2337 transitions. [2023-08-24 13:52:12,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 946 transitions, 55701 flow [2023-08-24 13:52:19,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 946 transitions, 55257 flow, removed 40 selfloop flow, removed 6 redundant places. [2023-08-24 13:52:19,996 INFO L231 Difference]: Finished difference. Result has 583 places, 855 transitions, 50275 flow [2023-08-24 13:52:19,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=48450, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=50275, PETRI_PLACES=583, PETRI_TRANSITIONS=855} [2023-08-24 13:52:19,997 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 560 predicate places. [2023-08-24 13:52:19,997 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 855 transitions, 50275 flow [2023-08-24 13:52:19,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 162.89285714285714) internal successors, (4561), 28 states have internal predecessors, (4561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:19,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:52:19,998 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:52:20,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-24 13:52:20,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-24 13:52:20,199 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:52:20,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:52:20,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2144392775, now seen corresponding path program 82 times [2023-08-24 13:52:20,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:52:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446516399] [2023-08-24 13:52:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:52:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:52:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:52:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:20,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:52:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446516399] [2023-08-24 13:52:20,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446516399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:52:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404062049] [2023-08-24 13:52:20,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:52:20,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:52:20,617 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:52:20,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-24 13:52:21,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:52:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:52:21,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:52:21,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:52:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:21,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:52:21,235 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:52:21,236 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 20 treesize of output 4 [2023-08-24 13:52:21,271 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:52:21,272 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 40 treesize of output 56 [2023-08-24 13:52:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:21,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404062049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:52:21,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:52:21,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:52:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876618326] [2023-08-24 13:52:21,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:52:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:52:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:52:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:52:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:52:21,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:52:21,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 855 transitions, 50275 flow. Second operand has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:21,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:52:21,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:52:21,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:52:25,680 INFO L124 PetriNetUnfolderBase]: 4459/7895 cut-off events. [2023-08-24 13:52:25,680 INFO L125 PetriNetUnfolderBase]: For 1604017/1604017 co-relation queries the response was YES. [2023-08-24 13:52:25,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201687 conditions, 7895 events. 4459/7895 cut-off events. For 1604017/1604017 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 58765 event pairs, 1694 based on Foata normal form. 4/7899 useless extension candidates. Maximal degree in co-relation 201539. Up to 7373 conditions per place. [2023-08-24 13:52:25,854 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 699 selfloop transitions, 160 changer transitions 5/864 dead transitions. [2023-08-24 13:52:25,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 864 transitions, 51976 flow [2023-08-24 13:52:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:52:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:52:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1527 transitions. [2023-08-24 13:52:25,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476775956284153 [2023-08-24 13:52:25,856 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1527 transitions. [2023-08-24 13:52:25,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1527 transitions. [2023-08-24 13:52:25,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:52:25,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1527 transitions. [2023-08-24 13:52:25,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.66666666666666) internal successors, (1527), 9 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:25,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:25,859 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:25,859 INFO L175 Difference]: Start difference. First operand has 583 places, 855 transitions, 50275 flow. Second operand 9 states and 1527 transitions. [2023-08-24 13:52:25,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 864 transitions, 51976 flow [2023-08-24 13:52:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 864 transitions, 51358 flow, removed 106 selfloop flow, removed 7 redundant places. [2023-08-24 13:52:33,196 INFO L231 Difference]: Finished difference. Result has 585 places, 851 transitions, 49721 flow [2023-08-24 13:52:33,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49551, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=49721, PETRI_PLACES=585, PETRI_TRANSITIONS=851} [2023-08-24 13:52:33,197 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 562 predicate places. [2023-08-24 13:52:33,197 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 851 transitions, 49721 flow [2023-08-24 13:52:33,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:33,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:52:33,197 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:52:33,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-08-24 13:52:33,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:33,398 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:52:33,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:52:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash -429761047, now seen corresponding path program 83 times [2023-08-24 13:52:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:52:33,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965109613] [2023-08-24 13:52:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:52:33,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:52:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:52:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:52:33,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965109613] [2023-08-24 13:52:33,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965109613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:52:33,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463517781] [2023-08-24 13:52:33,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:52:33,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:33,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:52:33,823 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:52:33,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-24 13:52:34,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:52:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:52:34,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 13:52:34,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:52:34,383 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:52:34,383 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-24 13:52:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:34,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:52:34,525 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:52:34,525 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 71 treesize of output 88 [2023-08-24 13:52:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:34,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463517781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:52:34,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:52:34,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:52:34,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835908114] [2023-08-24 13:52:34,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:52:34,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:52:34,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:52:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:52:34,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:52:34,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:52:34,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 851 transitions, 49721 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:34,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:52:34,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:52:34,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:52:39,097 INFO L124 PetriNetUnfolderBase]: 4453/7887 cut-off events. [2023-08-24 13:52:39,097 INFO L125 PetriNetUnfolderBase]: For 1558824/1558824 co-relation queries the response was YES. [2023-08-24 13:52:39,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200662 conditions, 7887 events. 4453/7887 cut-off events. For 1558824/1558824 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 58697 event pairs, 1688 based on Foata normal form. 4/7891 useless extension candidates. Maximal degree in co-relation 200514. Up to 7337 conditions per place. [2023-08-24 13:52:39,261 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 685 selfloop transitions, 173 changer transitions 9/867 dead transitions. [2023-08-24 13:52:39,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 867 transitions, 51853 flow [2023-08-24 13:52:39,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:52:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:52:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1529 transitions. [2023-08-24 13:52:39,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481329690346084 [2023-08-24 13:52:39,263 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1529 transitions. [2023-08-24 13:52:39,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1529 transitions. [2023-08-24 13:52:39,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:52:39,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1529 transitions. [2023-08-24 13:52:39,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.88888888888889) internal successors, (1529), 9 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:39,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:39,266 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:39,266 INFO L175 Difference]: Start difference. First operand has 585 places, 851 transitions, 49721 flow. Second operand 9 states and 1529 transitions. [2023-08-24 13:52:39,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 867 transitions, 51853 flow [2023-08-24 13:52:46,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 867 transitions, 51534 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-24 13:52:46,199 INFO L231 Difference]: Finished difference. Result has 584 places, 848 transitions, 49625 flow [2023-08-24 13:52:46,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49402, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=49625, PETRI_PLACES=584, PETRI_TRANSITIONS=848} [2023-08-24 13:52:46,200 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 561 predicate places. [2023-08-24 13:52:46,200 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 848 transitions, 49625 flow [2023-08-24 13:52:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:52:46,201 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:52:46,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-08-24 13:52:46,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:46,401 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:52:46,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:52:46,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1133557419, now seen corresponding path program 84 times [2023-08-24 13:52:46,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:52:46,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459006424] [2023-08-24 13:52:46,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:52:46,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:52:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:52:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:46,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:52:46,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459006424] [2023-08-24 13:52:46,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459006424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:52:46,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795963777] [2023-08-24 13:52:46,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:52:46,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:46,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:52:46,919 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:52:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-08-24 13:52:47,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:52:47,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:52:47,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:52:47,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:52:47,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:52:47,478 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 59 treesize of output 35 [2023-08-24 13:52:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:47,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:52:47,755 INFO L322 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-24 13:52:47,756 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 63 treesize of output 67 [2023-08-24 13:52:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:52:47,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795963777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:52:47,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:52:47,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-24 13:52:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532853021] [2023-08-24 13:52:47,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:52:47,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:52:47,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:52:47,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:52:47,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:52:47,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:52:47,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 848 transitions, 49625 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:47,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:52:47,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:52:47,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:52:52,314 INFO L124 PetriNetUnfolderBase]: 4471/7927 cut-off events. [2023-08-24 13:52:52,314 INFO L125 PetriNetUnfolderBase]: For 1572850/1572850 co-relation queries the response was YES. [2023-08-24 13:52:52,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201663 conditions, 7927 events. 4471/7927 cut-off events. For 1572850/1572850 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 59165 event pairs, 1174 based on Foata normal form. 20/7947 useless extension candidates. Maximal degree in co-relation 201514. Up to 5279 conditions per place. [2023-08-24 13:52:52,490 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 586 selfloop transitions, 292 changer transitions 0/878 dead transitions. [2023-08-24 13:52:52,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 878 transitions, 52045 flow [2023-08-24 13:52:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:52:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:52:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1715 transitions. [2023-08-24 13:52:52,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3514344262295082 [2023-08-24 13:52:52,492 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1715 transitions. [2023-08-24 13:52:52,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1715 transitions. [2023-08-24 13:52:52,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:52:52,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1715 transitions. [2023-08-24 13:52:52,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.5) internal successors, (1715), 10 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:52,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:52,495 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:52,495 INFO L175 Difference]: Start difference. First operand has 584 places, 848 transitions, 49625 flow. Second operand 10 states and 1715 transitions. [2023-08-24 13:52:52,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 878 transitions, 52045 flow [2023-08-24 13:52:59,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 878 transitions, 51609 flow, removed 58 selfloop flow, removed 5 redundant places. [2023-08-24 13:52:59,531 INFO L231 Difference]: Finished difference. Result has 588 places, 850 transitions, 49931 flow [2023-08-24 13:52:59,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49189, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=49931, PETRI_PLACES=588, PETRI_TRANSITIONS=850} [2023-08-24 13:52:59,531 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 565 predicate places. [2023-08-24 13:52:59,531 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 850 transitions, 49931 flow [2023-08-24 13:52:59,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:52:59,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:52:59,532 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:52:59,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-08-24 13:52:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:52:59,732 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:52:59,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:52:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -878159805, now seen corresponding path program 85 times [2023-08-24 13:52:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:52:59,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274525061] [2023-08-24 13:52:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:52:59,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:52:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:53:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:00,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:53:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274525061] [2023-08-24 13:53:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274525061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:53:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155344549] [2023-08-24 13:53:00,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:53:00,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:00,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:53:00,176 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:53:00,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-08-24 13:53:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:53:00,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-24 13:53:00,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:53:00,713 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:53:00,714 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 36 treesize of output 12 [2023-08-24 13:53:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:00,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:53:00,860 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:53:00,860 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 20 treesize of output 4 [2023-08-24 13:53:00,895 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:53:00,895 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 40 treesize of output 56 [2023-08-24 13:53:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:00,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155344549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:53:00,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:53:00,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 21 [2023-08-24 13:53:00,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291920297] [2023-08-24 13:53:00,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:53:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:53:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:53:00,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:53:00,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:53:00,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 488 [2023-08-24 13:53:00,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 850 transitions, 49931 flow. Second operand has 21 states, 21 states have (on average 164.1904761904762) internal successors, (3448), 21 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:00,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:53:00,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 488 [2023-08-24 13:53:00,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:53:05,373 INFO L124 PetriNetUnfolderBase]: 4481/7945 cut-off events. [2023-08-24 13:53:05,373 INFO L125 PetriNetUnfolderBase]: For 1583536/1583536 co-relation queries the response was YES. [2023-08-24 13:53:05,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202996 conditions, 7945 events. 4481/7945 cut-off events. For 1583536/1583536 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 59318 event pairs, 1698 based on Foata normal form. 24/7969 useless extension candidates. Maximal degree in co-relation 202846. Up to 7389 conditions per place. [2023-08-24 13:53:05,537 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 712 selfloop transitions, 162 changer transitions 0/874 dead transitions. [2023-08-24 13:53:05,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 874 transitions, 52336 flow [2023-08-24 13:53:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:53:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:53:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1675 transitions. [2023-08-24 13:53:05,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3432377049180328 [2023-08-24 13:53:05,539 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1675 transitions. [2023-08-24 13:53:05,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1675 transitions. [2023-08-24 13:53:05,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:53:05,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1675 transitions. [2023-08-24 13:53:05,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 167.5) internal successors, (1675), 10 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:05,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:05,542 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:05,542 INFO L175 Difference]: Start difference. First operand has 588 places, 850 transitions, 49931 flow. Second operand 10 states and 1675 transitions. [2023-08-24 13:53:05,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 874 transitions, 52336 flow [2023-08-24 13:53:12,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 874 transitions, 51896 flow, removed 42 selfloop flow, removed 6 redundant places. [2023-08-24 13:53:12,683 INFO L231 Difference]: Finished difference. Result has 592 places, 852 transitions, 49944 flow [2023-08-24 13:53:12,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49402, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=49944, PETRI_PLACES=592, PETRI_TRANSITIONS=852} [2023-08-24 13:53:12,684 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 569 predicate places. [2023-08-24 13:53:12,684 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 852 transitions, 49944 flow [2023-08-24 13:53:12,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 164.1904761904762) internal successors, (3448), 21 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:12,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:53:12,685 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:53:12,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-08-24 13:53:12,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2023-08-24 13:53:12,892 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:53:12,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:53:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash -861891323, now seen corresponding path program 86 times [2023-08-24 13:53:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:53:12,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001801785] [2023-08-24 13:53:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:53:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:53:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:53:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:13,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:53:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001801785] [2023-08-24 13:53:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001801785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:53:13,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276057429] [2023-08-24 13:53:13,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:53:13,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:53:13,425 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:53:13,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-08-24 13:53:13,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:53:13,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:53:13,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:53:13,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:53:14,055 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:53:14,055 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 46 treesize of output 30 [2023-08-24 13:53:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:14,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:53:14,264 INFO L322 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-24 13:53:14,264 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 63 treesize of output 67 [2023-08-24 13:53:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:14,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276057429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:53:14,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:53:14,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:53:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758099065] [2023-08-24 13:53:14,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:53:14,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:53:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:53:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:53:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:53:14,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:53:14,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 852 transitions, 49944 flow. Second operand has 22 states, 22 states have (on average 167.0) internal successors, (3674), 22 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:14,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:53:14,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:53:14,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:53:19,087 INFO L124 PetriNetUnfolderBase]: 4475/7935 cut-off events. [2023-08-24 13:53:19,087 INFO L125 PetriNetUnfolderBase]: For 1563352/1563352 co-relation queries the response was YES. [2023-08-24 13:53:19,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201865 conditions, 7935 events. 4475/7935 cut-off events. For 1563352/1563352 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 59270 event pairs, 1174 based on Foata normal form. 4/7939 useless extension candidates. Maximal degree in co-relation 201714. Up to 5295 conditions per place. [2023-08-24 13:53:19,393 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 583 selfloop transitions, 295 changer transitions 2/880 dead transitions. [2023-08-24 13:53:19,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 880 transitions, 52038 flow [2023-08-24 13:53:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 13:53:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 13:53:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2047 transitions. [2023-08-24 13:53:19,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34955601092896177 [2023-08-24 13:53:19,395 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2047 transitions. [2023-08-24 13:53:19,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2047 transitions. [2023-08-24 13:53:19,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:53:19,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2047 transitions. [2023-08-24 13:53:19,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 170.58333333333334) internal successors, (2047), 12 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:19,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:19,400 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 488.0) internal successors, (6344), 13 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:19,400 INFO L175 Difference]: Start difference. First operand has 592 places, 852 transitions, 49944 flow. Second operand 12 states and 2047 transitions. [2023-08-24 13:53:19,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 880 transitions, 52038 flow [2023-08-24 13:53:26,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 880 transitions, 51601 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-08-24 13:53:26,820 INFO L231 Difference]: Finished difference. Result has 598 places, 852 transitions, 50099 flow [2023-08-24 13:53:26,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49304, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=50099, PETRI_PLACES=598, PETRI_TRANSITIONS=852} [2023-08-24 13:53:26,821 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 575 predicate places. [2023-08-24 13:53:26,821 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 852 transitions, 50099 flow [2023-08-24 13:53:26,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 167.0) internal successors, (3674), 22 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:26,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:53:26,822 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:53:26,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-08-24 13:53:27,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:27,022 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:53:27,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:53:27,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1217402745, now seen corresponding path program 87 times [2023-08-24 13:53:27,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:53:27,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951479011] [2023-08-24 13:53:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:53:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:53:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:53:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:53:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951479011] [2023-08-24 13:53:27,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951479011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:53:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281770806] [2023-08-24 13:53:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:53:27,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:53:27,531 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:53:27,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-08-24 13:53:27,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 13:53:27,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:53:27,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:53:27,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:53:28,100 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:53:28,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-24 13:53:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:28,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:53:28,244 INFO L322 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-24 13:53:28,245 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 63 treesize of output 67 [2023-08-24 13:53:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281770806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:53:28,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:53:28,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2023-08-24 13:53:28,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508510421] [2023-08-24 13:53:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:53:28,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 13:53:28,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:53:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 13:53:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 13:53:28,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:53:28,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 852 transitions, 50099 flow. Second operand has 21 states, 21 states have (on average 167.04761904761904) internal successors, (3508), 21 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:28,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:53:28,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:53:28,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:53:32,799 INFO L124 PetriNetUnfolderBase]: 4473/7939 cut-off events. [2023-08-24 13:53:32,800 INFO L125 PetriNetUnfolderBase]: For 1559334/1559334 co-relation queries the response was YES. [2023-08-24 13:53:32,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202620 conditions, 7939 events. 4473/7939 cut-off events. For 1559334/1559334 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 59486 event pairs, 1142 based on Foata normal form. 4/7943 useless extension candidates. Maximal degree in co-relation 202466. Up to 5295 conditions per place. [2023-08-24 13:53:32,964 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 584 selfloop transitions, 303 changer transitions 10/897 dead transitions. [2023-08-24 13:53:32,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 897 transitions, 54215 flow [2023-08-24 13:53:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:53:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:53:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1537 transitions. [2023-08-24 13:53:32,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3499544626593807 [2023-08-24 13:53:32,966 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1537 transitions. [2023-08-24 13:53:32,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1537 transitions. [2023-08-24 13:53:32,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:53:32,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1537 transitions. [2023-08-24 13:53:32,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.77777777777777) internal successors, (1537), 9 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:32,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:32,969 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:32,969 INFO L175 Difference]: Start difference. First operand has 598 places, 852 transitions, 50099 flow. Second operand 9 states and 1537 transitions. [2023-08-24 13:53:32,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 897 transitions, 54215 flow [2023-08-24 13:53:40,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 897 transitions, 53551 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-08-24 13:53:40,480 INFO L231 Difference]: Finished difference. Result has 600 places, 852 transitions, 50314 flow [2023-08-24 13:53:40,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49469, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=50314, PETRI_PLACES=600, PETRI_TRANSITIONS=852} [2023-08-24 13:53:40,480 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 577 predicate places. [2023-08-24 13:53:40,481 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 852 transitions, 50314 flow [2023-08-24 13:53:40,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 167.04761904761904) internal successors, (3508), 21 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:40,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:53:40,481 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:53:40,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-08-24 13:53:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:40,682 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:53:40,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:53:40,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1362248927, now seen corresponding path program 88 times [2023-08-24 13:53:40,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:53:40,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329862367] [2023-08-24 13:53:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:53:40,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:53:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:53:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:41,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:53:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329862367] [2023-08-24 13:53:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329862367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:53:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961926521] [2023-08-24 13:53:41,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:53:41,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:41,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:53:41,210 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:53:41,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-08-24 13:53:41,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:53:41,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:53:41,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:53:41,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:53:41,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:53:41,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-24 13:53:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:41,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:53:41,920 INFO L322 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-24 13:53:41,921 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 63 treesize of output 67 [2023-08-24 13:53:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:41,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961926521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:53:41,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:53:41,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:53:41,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654231425] [2023-08-24 13:53:41,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:53:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:53:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:53:41,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:53:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:53:41,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:53:41,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 852 transitions, 50314 flow. Second operand has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:41,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:53:41,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:53:41,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:53:46,388 INFO L124 PetriNetUnfolderBase]: 4465/7923 cut-off events. [2023-08-24 13:53:46,389 INFO L125 PetriNetUnfolderBase]: For 1575072/1575072 co-relation queries the response was YES. [2023-08-24 13:53:46,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204008 conditions, 7923 events. 4465/7923 cut-off events. For 1575072/1575072 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 59221 event pairs, 1174 based on Foata normal form. 4/7927 useless extension candidates. Maximal degree in co-relation 203850. Up to 5295 conditions per place. [2023-08-24 13:53:46,697 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 576 selfloop transitions, 291 changer transitions 8/875 dead transitions. [2023-08-24 13:53:46,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 875 transitions, 52703 flow [2023-08-24 13:53:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:53:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:53:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1536 transitions. [2023-08-24 13:53:46,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34972677595628415 [2023-08-24 13:53:46,699 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1536 transitions. [2023-08-24 13:53:46,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1536 transitions. [2023-08-24 13:53:46,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:53:46,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1536 transitions. [2023-08-24 13:53:46,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:46,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:46,702 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:46,702 INFO L175 Difference]: Start difference. First operand has 600 places, 852 transitions, 50314 flow. Second operand 9 states and 1536 transitions. [2023-08-24 13:53:46,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 875 transitions, 52703 flow [2023-08-24 13:53:54,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 875 transitions, 52261 flow, removed 54 selfloop flow, removed 6 redundant places. [2023-08-24 13:53:54,617 INFO L231 Difference]: Finished difference. Result has 600 places, 852 transitions, 50582 flow [2023-08-24 13:53:54,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49884, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=50582, PETRI_PLACES=600, PETRI_TRANSITIONS=852} [2023-08-24 13:53:54,618 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 577 predicate places. [2023-08-24 13:53:54,618 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 852 transitions, 50582 flow [2023-08-24 13:53:54,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:54,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:53:54,619 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:53:54,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-08-24 13:53:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:54,825 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:53:54,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:53:54,825 INFO L85 PathProgramCache]: Analyzing trace with hash 262905787, now seen corresponding path program 89 times [2023-08-24 13:53:54,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:53:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731209471] [2023-08-24 13:53:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:53:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:53:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:53:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:55,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:53:55,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731209471] [2023-08-24 13:53:55,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731209471] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:53:55,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303732697] [2023-08-24 13:53:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:53:55,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:53:55,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:53:55,321 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:53:55,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-08-24 13:53:55,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:53:55,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:53:55,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:53:55,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:53:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:55,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:53:56,150 INFO L322 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2023-08-24 13:53:56,150 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 63 treesize of output 67 [2023-08-24 13:53:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:53:56,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303732697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:53:56,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:53:56,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2023-08-24 13:53:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937217208] [2023-08-24 13:53:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:53:56,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:53:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:53:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:53:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:53:56,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:53:56,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 852 transitions, 50582 flow. Second operand has 22 states, 22 states have (on average 167.0) internal successors, (3674), 22 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:53:56,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:53:56,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:53:56,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:54:00,525 INFO L124 PetriNetUnfolderBase]: 4447/7867 cut-off events. [2023-08-24 13:54:00,525 INFO L125 PetriNetUnfolderBase]: For 1512028/1512028 co-relation queries the response was YES. [2023-08-24 13:54:00,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199956 conditions, 7867 events. 4447/7867 cut-off events. For 1512028/1512028 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 58518 event pairs, 1174 based on Foata normal form. 4/7871 useless extension candidates. Maximal degree in co-relation 199800. Up to 5295 conditions per place. [2023-08-24 13:54:00,810 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 574 selfloop transitions, 288 changer transitions 6/868 dead transitions. [2023-08-24 13:54:00,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 868 transitions, 52446 flow [2023-08-24 13:54:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:54:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:54:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1535 transitions. [2023-08-24 13:54:00,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494990892531876 [2023-08-24 13:54:00,812 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1535 transitions. [2023-08-24 13:54:00,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1535 transitions. [2023-08-24 13:54:00,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:54:00,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1535 transitions. [2023-08-24 13:54:00,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.55555555555554) internal successors, (1535), 9 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:00,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:00,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:00,815 INFO L175 Difference]: Start difference. First operand has 600 places, 852 transitions, 50582 flow. Second operand 9 states and 1535 transitions. [2023-08-24 13:54:00,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 868 transitions, 52446 flow [2023-08-24 13:54:07,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 868 transitions, 51832 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-08-24 13:54:07,901 INFO L231 Difference]: Finished difference. Result has 600 places, 848 transitions, 50357 flow [2023-08-24 13:54:07,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49968, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=50357, PETRI_PLACES=600, PETRI_TRANSITIONS=848} [2023-08-24 13:54:07,902 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 577 predicate places. [2023-08-24 13:54:07,902 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 848 transitions, 50357 flow [2023-08-24 13:54:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 167.0) internal successors, (3674), 22 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:07,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:54:07,903 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:54:07,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-08-24 13:54:08,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:54:08,109 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:54:08,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:54:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1811596721, now seen corresponding path program 90 times [2023-08-24 13:54:08,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:54:08,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993291105] [2023-08-24 13:54:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:54:08,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:54:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:54:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:08,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:54:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993291105] [2023-08-24 13:54:08,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993291105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:54:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243429201] [2023-08-24 13:54:08,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 13:54:08,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:54:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:54:08,597 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:54:08,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-08-24 13:54:09,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 13:54:09,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:54:09,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:54:09,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:54:09,149 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:54:09,149 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 46 treesize of output 30 [2023-08-24 13:54:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:09,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:54:09,320 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:54:09,320 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 20 treesize of output 4 [2023-08-24 13:54:09,353 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:54:09,353 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 40 treesize of output 56 [2023-08-24 13:54:09,388 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:09,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243429201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:54:09,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:54:09,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-24 13:54:09,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8631247] [2023-08-24 13:54:09,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:54:09,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:54:09,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:54:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:54:09,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:54:09,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:54:09,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 848 transitions, 50357 flow. Second operand has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:09,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:54:09,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:54:09,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:54:13,987 INFO L124 PetriNetUnfolderBase]: 4471/7939 cut-off events. [2023-08-24 13:54:13,987 INFO L125 PetriNetUnfolderBase]: For 1540808/1540808 co-relation queries the response was YES. [2023-08-24 13:54:14,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201726 conditions, 7939 events. 4471/7939 cut-off events. For 1540808/1540808 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 59283 event pairs, 1678 based on Foata normal form. 20/7959 useless extension candidates. Maximal degree in co-relation 201570. Up to 7325 conditions per place. [2023-08-24 13:54:14,155 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 708 selfloop transitions, 169 changer transitions 0/877 dead transitions. [2023-08-24 13:54:14,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 877 transitions, 52816 flow [2023-08-24 13:54:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:54:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:54:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2214 transitions. [2023-08-24 13:54:14,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489911727616646 [2023-08-24 13:54:14,157 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2214 transitions. [2023-08-24 13:54:14,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2214 transitions. [2023-08-24 13:54:14,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:54:14,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2214 transitions. [2023-08-24 13:54:14,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 170.30769230769232) internal successors, (2214), 13 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:14,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:14,270 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 488.0) internal successors, (6832), 14 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:14,270 INFO L175 Difference]: Start difference. First operand has 600 places, 848 transitions, 50357 flow. Second operand 13 states and 2214 transitions. [2023-08-24 13:54:14,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 877 transitions, 52816 flow [2023-08-24 13:54:21,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 877 transitions, 52210 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-24 13:54:21,490 INFO L231 Difference]: Finished difference. Result has 601 places, 850 transitions, 50339 flow [2023-08-24 13:54:21,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49740, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=678, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=50339, PETRI_PLACES=601, PETRI_TRANSITIONS=850} [2023-08-24 13:54:21,491 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 578 predicate places. [2023-08-24 13:54:21,491 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 850 transitions, 50339 flow [2023-08-24 13:54:21,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.15) internal successors, (3343), 20 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:21,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:54:21,492 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:54:21,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-08-24 13:54:21,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-08-24 13:54:21,692 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:54:21,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:54:21,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1641065999, now seen corresponding path program 91 times [2023-08-24 13:54:21,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:54:21,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796487592] [2023-08-24 13:54:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:54:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:54:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:54:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:22,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:54:22,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796487592] [2023-08-24 13:54:22,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796487592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:54:22,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642291181] [2023-08-24 13:54:22,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 13:54:22,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:54:22,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:54:22,187 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:54:22,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-08-24 13:54:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:54:22,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:54:22,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:54:22,731 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:54:22,731 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 59 treesize of output 35 [2023-08-24 13:54:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:22,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:54:22,934 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:54:22,935 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 71 treesize of output 88 [2023-08-24 13:54:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:22,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642291181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:54:22,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:54:22,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:54:22,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289980968] [2023-08-24 13:54:22,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:54:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:54:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:54:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:54:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:54:22,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:54:22,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 850 transitions, 50339 flow. Second operand has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:22,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:54:22,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:54:22,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:54:27,766 INFO L124 PetriNetUnfolderBase]: 4493/7993 cut-off events. [2023-08-24 13:54:27,766 INFO L125 PetriNetUnfolderBase]: For 1522628/1522628 co-relation queries the response was YES. [2023-08-24 13:54:27,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201889 conditions, 7993 events. 4493/7993 cut-off events. For 1522628/1522628 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 59843 event pairs, 1676 based on Foata normal form. 4/7997 useless extension candidates. Maximal degree in co-relation 201734. Up to 7327 conditions per place. [2023-08-24 13:54:27,930 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 689 selfloop transitions, 188 changer transitions 3/880 dead transitions. [2023-08-24 13:54:27,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 880 transitions, 52446 flow [2023-08-24 13:54:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 13:54:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 13:54:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2381 transitions. [2023-08-24 13:54:27,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34850702576112413 [2023-08-24 13:54:27,932 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2381 transitions. [2023-08-24 13:54:27,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2381 transitions. [2023-08-24 13:54:27,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:54:27,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2381 transitions. [2023-08-24 13:54:27,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 170.07142857142858) internal successors, (2381), 14 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:27,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:27,936 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 488.0) internal successors, (7320), 15 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:27,937 INFO L175 Difference]: Start difference. First operand has 601 places, 850 transitions, 50339 flow. Second operand 14 states and 2381 transitions. [2023-08-24 13:54:27,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 880 transitions, 52446 flow [2023-08-24 13:54:35,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 880 transitions, 52018 flow, removed 50 selfloop flow, removed 8 redundant places. [2023-08-24 13:54:35,180 INFO L231 Difference]: Finished difference. Result has 606 places, 851 transitions, 50396 flow [2023-08-24 13:54:35,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49603, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=50396, PETRI_PLACES=606, PETRI_TRANSITIONS=851} [2023-08-24 13:54:35,181 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 583 predicate places. [2023-08-24 13:54:35,181 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 851 transitions, 50396 flow [2023-08-24 13:54:35,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:35,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:54:35,181 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:54:35,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2023-08-24 13:54:35,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2023-08-24 13:54:35,382 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:54:35,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:54:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1395288423, now seen corresponding path program 92 times [2023-08-24 13:54:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:54:35,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139201679] [2023-08-24 13:54:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:54:35,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:54:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:54:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:35,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:54:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139201679] [2023-08-24 13:54:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139201679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:54:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258711707] [2023-08-24 13:54:35,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:54:35,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:54:35,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:54:35,846 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:54:35,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-08-24 13:54:36,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:54:36,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:54:36,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:54:36,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:54:36,369 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:54:36,370 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 46 treesize of output 30 [2023-08-24 13:54:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:36,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:54:36,555 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:54:36,556 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 20 treesize of output 4 [2023-08-24 13:54:36,591 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:54:36,591 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 40 treesize of output 56 [2023-08-24 13:54:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:36,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258711707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:54:36,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:54:36,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 20 [2023-08-24 13:54:36,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586672133] [2023-08-24 13:54:36,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:54:36,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:54:36,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:54:36,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:54:36,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:54:36,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:54:36,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 851 transitions, 50396 flow. Second operand has 20 states, 20 states have (on average 167.25) internal successors, (3345), 20 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:36,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:54:36,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:54:36,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:54:41,301 INFO L124 PetriNetUnfolderBase]: 4501/7997 cut-off events. [2023-08-24 13:54:41,301 INFO L125 PetriNetUnfolderBase]: For 1534688/1534688 co-relation queries the response was YES. [2023-08-24 13:54:41,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202375 conditions, 7997 events. 4501/7997 cut-off events. For 1534688/1534688 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 59726 event pairs, 1696 based on Foata normal form. 28/8025 useless extension candidates. Maximal degree in co-relation 202220. Up to 7433 conditions per place. [2023-08-24 13:54:41,474 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 700 selfloop transitions, 167 changer transitions 0/867 dead transitions. [2023-08-24 13:54:41,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 867 transitions, 52493 flow [2023-08-24 13:54:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:54:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:54:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1701 transitions. [2023-08-24 13:54:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485655737704918 [2023-08-24 13:54:41,476 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1701 transitions. [2023-08-24 13:54:41,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1701 transitions. [2023-08-24 13:54:41,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:54:41,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1701 transitions. [2023-08-24 13:54:41,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.1) internal successors, (1701), 10 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:41,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:41,479 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 488.0) internal successors, (5368), 11 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:41,479 INFO L175 Difference]: Start difference. First operand has 606 places, 851 transitions, 50396 flow. Second operand 10 states and 1701 transitions. [2023-08-24 13:54:41,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 867 transitions, 52493 flow [2023-08-24 13:54:48,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 867 transitions, 52055 flow, removed 34 selfloop flow, removed 11 redundant places. [2023-08-24 13:54:48,789 INFO L231 Difference]: Finished difference. Result has 602 places, 851 transitions, 50355 flow [2023-08-24 13:54:48,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49856, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=50355, PETRI_PLACES=602, PETRI_TRANSITIONS=851} [2023-08-24 13:54:48,792 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 579 predicate places. [2023-08-24 13:54:48,792 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 851 transitions, 50355 flow [2023-08-24 13:54:48,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.25) internal successors, (3345), 20 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:48,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:54:48,793 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:54:48,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-08-24 13:54:48,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2023-08-24 13:54:48,998 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:54:48,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:54:48,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1529104187, now seen corresponding path program 93 times [2023-08-24 13:54:48,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:54:48,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631900369] [2023-08-24 13:54:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:54:48,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:54:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:54:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:49,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:54:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631900369] [2023-08-24 13:54:49,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631900369] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:54:49,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958973222] [2023-08-24 13:54:49,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:54:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:54:49,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:54:49,500 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:54:49,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-08-24 13:54:49,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:54:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:54:49,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:54:49,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:54:50,084 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:54:50,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 60 [2023-08-24 13:54:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:50,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:54:50,233 INFO L322 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-08-24 13:54:50,233 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 71 treesize of output 88 [2023-08-24 13:54:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:54:50,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958973222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:54:50,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:54:50,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:54:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368233061] [2023-08-24 13:54:50,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:54:50,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:54:50,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:54:50,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:54:50,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:54:50,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:54:50,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 851 transitions, 50355 flow. Second operand has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:50,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:54:50,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:54:50,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:54:54,816 INFO L124 PetriNetUnfolderBase]: 4483/7935 cut-off events. [2023-08-24 13:54:54,817 INFO L125 PetriNetUnfolderBase]: For 1521031/1521031 co-relation queries the response was YES. [2023-08-24 13:54:54,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200679 conditions, 7935 events. 4483/7935 cut-off events. For 1521031/1521031 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 58989 event pairs, 1691 based on Foata normal form. 4/7939 useless extension candidates. Maximal degree in co-relation 200524. Up to 7399 conditions per place. [2023-08-24 13:54:54,980 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 685 selfloop transitions, 171 changer transitions 6/862 dead transitions. [2023-08-24 13:54:54,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 862 transitions, 52163 flow [2023-08-24 13:54:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:54:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:54:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1529 transitions. [2023-08-24 13:54:54,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481329690346084 [2023-08-24 13:54:54,982 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1529 transitions. [2023-08-24 13:54:54,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1529 transitions. [2023-08-24 13:54:54,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:54:54,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1529 transitions. [2023-08-24 13:54:54,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.88888888888889) internal successors, (1529), 9 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:54,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:54,985 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:54:54,985 INFO L175 Difference]: Start difference. First operand has 602 places, 851 transitions, 50355 flow. Second operand 9 states and 1529 transitions. [2023-08-24 13:54:54,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 862 transitions, 52163 flow [2023-08-24 13:55:02,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 862 transitions, 51738 flow, removed 47 selfloop flow, removed 7 redundant places. [2023-08-24 13:55:02,494 INFO L231 Difference]: Finished difference. Result has 604 places, 847 transitions, 50087 flow [2023-08-24 13:55:02,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49930, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=680, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=50087, PETRI_PLACES=604, PETRI_TRANSITIONS=847} [2023-08-24 13:55:02,496 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 581 predicate places. [2023-08-24 13:55:02,496 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 847 transitions, 50087 flow [2023-08-24 13:55:02,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:02,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:55:02,496 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:55:02,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2023-08-24 13:55:02,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:55:02,703 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:55:02,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:55:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 487921833, now seen corresponding path program 94 times [2023-08-24 13:55:02,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:55:02,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663976684] [2023-08-24 13:55:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:55:02,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:55:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:55:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:55:03,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:55:03,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663976684] [2023-08-24 13:55:03,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663976684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:55:03,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57406213] [2023-08-24 13:55:03,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:55:03,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:55:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:55:03,236 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:55:03,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-08-24 13:55:03,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:55:03,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:55:03,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-24 13:55:03,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:55:03,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:55:03,770 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 46 treesize of output 30 [2023-08-24 13:55:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:55:03,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:55:03,923 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-08-24 13:55:03,923 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 4 [2023-08-24 13:55:03,957 INFO L322 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-08-24 13:55:03,957 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 40 treesize of output 56 [2023-08-24 13:55:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:55:03,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57406213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:55:03,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:55:03,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 20 [2023-08-24 13:55:03,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36853272] [2023-08-24 13:55:03,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:55:03,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 13:55:03,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:55:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 13:55:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-24 13:55:03,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 488 [2023-08-24 13:55:03,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 847 transitions, 50087 flow. Second operand has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:03,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:55:03,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 488 [2023-08-24 13:55:03,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:55:08,289 INFO L124 PetriNetUnfolderBase]: 4459/7859 cut-off events. [2023-08-24 13:55:08,289 INFO L125 PetriNetUnfolderBase]: For 1507049/1507049 co-relation queries the response was YES. [2023-08-24 13:55:08,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198528 conditions, 7859 events. 4459/7859 cut-off events. For 1507049/1507049 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 58043 event pairs, 1673 based on Foata normal form. 4/7863 useless extension candidates. Maximal degree in co-relation 198372. Up to 7333 conditions per place. [2023-08-24 13:55:08,458 INFO L140 encePairwiseOnDemand]: 481/488 looper letters, 690 selfloop transitions, 162 changer transitions 2/854 dead transitions. [2023-08-24 13:55:08,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 854 transitions, 51577 flow [2023-08-24 13:55:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:55:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:55:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1530 transitions. [2023-08-24 13:55:08,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3483606557377049 [2023-08-24 13:55:08,460 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1530 transitions. [2023-08-24 13:55:08,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1530 transitions. [2023-08-24 13:55:08,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:55:08,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1530 transitions. [2023-08-24 13:55:08,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:08,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:08,463 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 488.0) internal successors, (4880), 10 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:08,463 INFO L175 Difference]: Start difference. First operand has 604 places, 847 transitions, 50087 flow. Second operand 9 states and 1530 transitions. [2023-08-24 13:55:08,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 854 transitions, 51577 flow [2023-08-24 13:55:16,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 854 transitions, 51209 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-24 13:55:16,049 INFO L231 Difference]: Finished difference. Result has 598 places, 843 transitions, 49730 flow [2023-08-24 13:55:16,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=488, PETRI_DIFFERENCE_MINUEND_FLOW=49424, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=49730, PETRI_PLACES=598, PETRI_TRANSITIONS=843} [2023-08-24 13:55:16,049 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 575 predicate places. [2023-08-24 13:55:16,049 INFO L495 AbstractCegarLoop]: Abstraction has has 598 places, 843 transitions, 49730 flow [2023-08-24 13:55:16,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 167.1) internal successors, (3342), 20 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:16,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:55:16,050 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:55:16,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2023-08-24 13:55:16,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-08-24 13:55:16,251 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:55:16,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:55:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1206850211, now seen corresponding path program 95 times [2023-08-24 13:55:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:55:16,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957105642] [2023-08-24 13:55:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:55:16,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:55:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:55:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:55:16,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:55:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957105642] [2023-08-24 13:55:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957105642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:55:16,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194003347] [2023-08-24 13:55:16,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 13:55:16,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:55:16,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:55:16,763 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 13:55:16,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2023-08-24 13:55:17,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 13:55:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:55:17,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-24 13:55:17,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:55:17,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:55:17,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 13:55:17,498 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 13:55:17,499 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 55 treesize of output 23 [2023-08-24 13:55:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:55:17,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:55:17,652 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_7048 (Array Int Int)) (~o_2~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_7048))) (let ((.cse1 (select .cse0 ~o_2~0.base))) (or (= (select (select .cse0 c_~o_0~0.base) c_~o_0~0.offset) (select .cse1 c_~o_2~0.offset)) (not (= (select .cse1 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~o_2~0.offset)) |c_thread1Thread1of1ForFork1_#t~mem1#1|)))))) is different from false [2023-08-24 13:55:17,700 INFO L322 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-08-24 13:55:17,700 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 114 treesize of output 127 [2023-08-24 13:55:17,716 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:55:17,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 88 [2023-08-24 13:55:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-24 13:55:17,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194003347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:55:17,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:55:17,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 13:55:17,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935494351] [2023-08-24 13:55:17,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:55:17,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 13:55:17,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:55:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 13:55:17,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=650, Unknown=1, NotChecked=52, Total=812 [2023-08-24 13:55:17,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 488 [2023-08-24 13:55:17,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 843 transitions, 49730 flow. Second operand has 29 states, 29 states have (on average 162.89655172413794) internal successors, (4724), 29 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:17,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:55:17,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 488 [2023-08-24 13:55:17,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:55:22,720 INFO L124 PetriNetUnfolderBase]: 4567/8039 cut-off events. [2023-08-24 13:55:22,720 INFO L125 PetriNetUnfolderBase]: For 1609442/1609442 co-relation queries the response was YES. [2023-08-24 13:55:22,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203472 conditions, 8039 events. 4567/8039 cut-off events. For 1609442/1609442 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 59594 event pairs, 828 based on Foata normal form. 52/8091 useless extension candidates. Maximal degree in co-relation 203318. Up to 4245 conditions per place. [2023-08-24 13:55:22,885 INFO L140 encePairwiseOnDemand]: 478/488 looper letters, 587 selfloop transitions, 314 changer transitions 0/901 dead transitions. [2023-08-24 13:55:22,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 901 transitions, 53846 flow [2023-08-24 13:55:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:55:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:55:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2501 transitions. [2023-08-24 13:55:22,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2023-08-24 13:55:22,887 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2501 transitions. [2023-08-24 13:55:22,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2501 transitions. [2023-08-24 13:55:22,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:55:22,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2501 transitions. [2023-08-24 13:55:22,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.73333333333332) internal successors, (2501), 15 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:22,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:22,892 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 488.0) internal successors, (7808), 16 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:55:22,892 INFO L175 Difference]: Start difference. First operand has 598 places, 843 transitions, 49730 flow. Second operand 15 states and 2501 transitions. [2023-08-24 13:55:22,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 901 transitions, 53846 flow Received shutdown request... [2023-08-24 13:55:28,522 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 13:55:28,522 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 13:55:28,533 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 13:55:28,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2023-08-24 13:55:28,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-08-24 13:55:28,733 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 13:55:28,735 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 13:55:28,735 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 13:55:28,735 INFO L445 BasicCegarLoop]: Path program histogram: [95, 6, 1, 1, 1] [2023-08-24 13:55:28,737 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 13:55:28,737 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 13:55:28,750 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 01:55:28 BasicIcfg [2023-08-24 13:55:28,750 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 13:55:28,750 INFO L158 Benchmark]: Toolchain (without parser) took 778008.33ms. Allocated memory was 362.8MB in the beginning and 10.1GB in the end (delta: 9.7GB). Free memory was 339.1MB in the beginning and 8.5GB in the end (delta: -8.1GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-24 13:55:28,750 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 362.8MB. Free memory is still 339.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 13:55:28,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.06ms. Allocated memory is still 362.8MB. Free memory was 338.8MB in the beginning and 327.2MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 13:55:28,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.79ms. Allocated memory is still 362.8MB. Free memory was 327.2MB in the beginning and 324.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 13:55:28,750 INFO L158 Benchmark]: Boogie Preprocessor took 50.22ms. Allocated memory is still 362.8MB. Free memory was 324.8MB in the beginning and 323.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 13:55:28,751 INFO L158 Benchmark]: RCFGBuilder took 468.70ms. Allocated memory is still 362.8MB. Free memory was 323.0MB in the beginning and 303.0MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 13:55:28,751 INFO L158 Benchmark]: TraceAbstraction took 777151.88ms. Allocated memory was 362.8MB in the beginning and 10.1GB in the end (delta: 9.7GB). Free memory was 302.4MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-08-24 13:55:28,753 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 362.8MB. Free memory is still 339.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 273.06ms. Allocated memory is still 362.8MB. Free memory was 338.8MB in the beginning and 327.2MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 58.79ms. Allocated memory is still 362.8MB. Free memory was 327.2MB in the beginning and 324.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 50.22ms. Allocated memory is still 362.8MB. Free memory was 324.8MB in the beginning and 323.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 468.70ms. Allocated memory is still 362.8MB. Free memory was 323.0MB in the beginning and 303.0MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 777151.88ms. Allocated memory was 362.8MB in the beginning and 10.1GB in the end (delta: 9.7GB). Free memory was 302.4MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 209 PlacesBefore, 23 PlacesAfterwards, 223 TransitionsBefore, 20 TransitionsAfterwards, 5400 CoEnabledTransitionPairs, 6 FixpointIterations, 101 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 29 TrivialYvCompositions, 25 ConcurrentYvCompositions, 17 ChoiceCompositions, 255 TotalNumberOfCompositions, 5253 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4980, independent: 4956, independent conditional: 0, independent unconditional: 4956, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3159, independent: 3151, independent conditional: 0, independent unconditional: 3151, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4980, independent: 1805, independent conditional: 0, independent unconditional: 1805, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 3159, unknown conditional: 0, unknown unconditional: 3159] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 297 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: 777.0s, OverallIterations: 104, TraceHistogramMax: 5, PathProgramHistogramMax: 95, EmptinessCheckTime: 0.0s, AutomataDifference: 565.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.1s, HoareTripleCheckerStatistics: 290 mSolverCounterUnknown, 12890 SdHoareTripleChecker+Valid, 40.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12890 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 36.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1288 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1427 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54731 IncrementalHoareTripleChecker+Invalid, 57736 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1427 mSolverCounterUnsat, 0 mSDtfsCounter, 54731 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8207 GetRequests, 4866 SyntacticMatches, 57 SemanticMatches, 3284 ConstructedPredicates, 16 IntricatePredicates, 6 DeprecatedPredicates, 23812 ImplicationChecksByTransitivity, 121.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50582occurred in iteration=97, InterpolantAutomatonStates: 1412, 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: 1.8s SsaConstructionTime, 8.2s SatisfiabilityAnalysisTime, 152.5s InterpolantComputationTime, 5824 NumberOfCodeBlocks, 5720 NumberOfCodeBlocksAsserted, 347 NumberOfCheckSat, 8331 ConstructedInterpolants, 183 QuantifiedInterpolants, 88656 SizeOfPredicates, 2286 NumberOfNonLiveVariables, 34748 ConjunctsInSsa, 5045 ConjunctsInUnsatCore, 300 InterpolantComputations, 7 PerfectInterpolantSequences, 9096/9937 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