/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 02:01:08,218 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 02:01:08,290 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 02:01:08,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 02:01:08,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 02:01:08,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 02:01:08,314 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 02:01:08,314 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 02:01:08,314 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 02:01:08,315 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 02:01:08,315 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 02:01:08,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 02:01:08,316 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 02:01:08,316 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 02:01:08,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 02:01:08,317 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 02:01:08,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 02:01:08,318 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 02:01:08,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 02:01:08,318 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 02:01:08,318 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 02:01:08,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 02:01:08,319 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 02:01:08,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 02:01:08,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 02:01:08,320 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 02:01:08,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 02:01:08,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:01:08,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 02:01:08,321 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 02:01:08,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 02:01:08,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 02:01:08,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 02:01:08,322 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 02:01:08,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 02:01:08,322 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 02:01:08,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 02:01:08,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 02:01:08,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 02:01:08,622 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 02:01:08,622 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 02:01:08,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-24 02:01:09,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 02:01:10,152 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 02:01:10,153 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-24 02:01:10,159 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da599fa6/c20bc7112f0a4a958301cc468cf5f759/FLAG7e12378cf [2023-08-24 02:01:10,171 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5da599fa6/c20bc7112f0a4a958301cc468cf5f759 [2023-08-24 02:01:10,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 02:01:10,176 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 02:01:10,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 02:01:10,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 02:01:10,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 02:01:10,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48796c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10, skipping insertion in model container [2023-08-24 02:01:10,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,198 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 02:01:10,340 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/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-08-24 02:01:10,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:01:10,355 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 02:01:10,371 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/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-08-24 02:01:10,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:01:10,383 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:01:10,384 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:01:10,389 INFO L206 MainTranslator]: Completed translation [2023-08-24 02:01:10,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10 WrapperNode [2023-08-24 02:01:10,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 02:01:10,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 02:01:10,391 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 02:01:10,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 02:01:10,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,423 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 143 [2023-08-24 02:01:10,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 02:01:10,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 02:01:10,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 02:01:10,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 02:01:10,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,434 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,434 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,443 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,444 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,445 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,447 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 02:01:10,448 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 02:01:10,448 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 02:01:10,448 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 02:01:10,449 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (1/1) ... [2023-08-24 02:01:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:01:10,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:10,488 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 02:01:10,490 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 02:01:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 02:01:10,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 02:01:10,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 02:01:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 02:01:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 02:01:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 02:01:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 02:01:10,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 02:01:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 02:01:10,525 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 02:01:10,630 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 02:01:10,632 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 02:01:10,859 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 02:01:10,983 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 02:01:10,984 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 02:01:10,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:01:10 BoogieIcfgContainer [2023-08-24 02:01:10,987 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 02:01:10,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 02:01:10,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 02:01:10,992 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 02:01:10,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:01:10" (1/3) ... [2023-08-24 02:01:10,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a5f511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:01:10, skipping insertion in model container [2023-08-24 02:01:10,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:01:10" (2/3) ... [2023-08-24 02:01:10,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a5f511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:01:10, skipping insertion in model container [2023-08-24 02:01:10,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:01:10" (3/3) ... [2023-08-24 02:01:10,995 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-24 02:01:11,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 02:01:11,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 02:01:11,011 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 02:01:11,071 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 02:01:11,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 112 transitions, 240 flow [2023-08-24 02:01:11,212 INFO L124 PetriNetUnfolderBase]: 9/110 cut-off events. [2023-08-24 02:01:11,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:01:11,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 110 events. 9/110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-24 02:01:11,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 112 transitions, 240 flow [2023-08-24 02:01:11,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 102 transitions, 216 flow [2023-08-24 02:01:11,224 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 02:01:11,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 216 flow [2023-08-24 02:01:11,245 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 102 transitions, 216 flow [2023-08-24 02:01:11,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 216 flow [2023-08-24 02:01:11,289 INFO L124 PetriNetUnfolderBase]: 9/102 cut-off events. [2023-08-24 02:01:11,289 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:01:11,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 9/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-24 02:01:11,291 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 02:01:15,058 INFO L134 LiptonReduction]: Checked pairs total: 647 [2023-08-24 02:01:15,059 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-24 02:01:15,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 02:01:15,083 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;@5e8481b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 02:01:15,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 02:01:15,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 02:01:15,087 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 02:01:15,087 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:01:15,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:15,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:15,095 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 02:01:15,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 612242945, now seen corresponding path program 1 times [2023-08-24 02:01:15,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574078549] [2023-08-24 02:01:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:15,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:15,419 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 02:01:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:15,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574078549] [2023-08-24 02:01:15,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574078549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:01:15,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:01:15,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 02:01:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24987659] [2023-08-24 02:01:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:01:15,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 02:01:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 02:01:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 02:01:15,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 214 [2023-08-24 02:01:15,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:15,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 214 [2023-08-24 02:01:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:15,529 INFO L124 PetriNetUnfolderBase]: 66/116 cut-off events. [2023-08-24 02:01:15,529 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 02:01:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-24 02:01:15,532 INFO L140 encePairwiseOnDemand]: 210/214 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-24 02:01:15,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-08-24 02:01:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 02:01:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 02:01:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-08-24 02:01:15,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937694704049844 [2023-08-24 02:01:15,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-08-24 02:01:15,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-08-24 02:01:15,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:15,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-08-24 02:01:15,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,573 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 317 transitions. [2023-08-24 02:01:15,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-08-24 02:01:15,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 02:01:15,579 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-08-24 02:01:15,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-08-24 02:01:15,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 02:01:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-08-24 02:01:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:15,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:15,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 02:01:15,589 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 02:01:15,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:15,595 INFO L85 PathProgramCache]: Analyzing trace with hash 73829977, now seen corresponding path program 1 times [2023-08-24 02:01:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:15,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153585426] [2023-08-24 02:01:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:15,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:15,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153585426] [2023-08-24 02:01:15,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153585426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:01:15,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:01:15,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 02:01:15,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069291074] [2023-08-24 02:01:15,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:01:15,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:01:15,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:15,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:01:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:01:15,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:15,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:15,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:15,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:15,912 INFO L124 PetriNetUnfolderBase]: 113/217 cut-off events. [2023-08-24 02:01:15,912 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-24 02:01:15,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 825 event pairs, 62 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-08-24 02:01:15,914 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 34 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 02:01:15,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-08-24 02:01:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:01:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:01:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-08-24 02:01:15,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38878504672897196 [2023-08-24 02:01:15,918 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-08-24 02:01:15,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-08-24 02:01:15,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:15,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-08-24 02:01:15,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,923 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,923 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 416 transitions. [2023-08-24 02:01:15,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-08-24 02:01:15,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 02:01:15,924 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 92 flow [2023-08-24 02:01:15,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-08-24 02:01:15,925 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 02:01:15,925 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 92 flow [2023-08-24 02:01:15,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:15,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:15,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:15,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 02:01:15,926 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 02:01:15,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash -226286119, now seen corresponding path program 1 times [2023-08-24 02:01:15,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:15,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074271476] [2023-08-24 02:01:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:16,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:16,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074271476] [2023-08-24 02:01:16,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074271476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:01:16,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:01:16,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 02:01:16,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525851495] [2023-08-24 02:01:16,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:01:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:01:16,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:16,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:01:16,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:01:16,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:16,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:16,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:16,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:16,152 INFO L124 PetriNetUnfolderBase]: 79/162 cut-off events. [2023-08-24 02:01:16,153 INFO L125 PetriNetUnfolderBase]: For 89/95 co-relation queries the response was YES. [2023-08-24 02:01:16,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 162 events. 79/162 cut-off events. For 89/95 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 572 event pairs, 44 based on Foata normal form. 12/171 useless extension candidates. Maximal degree in co-relation 320. Up to 116 conditions per place. [2023-08-24 02:01:16,157 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-08-24 02:01:16,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 195 flow [2023-08-24 02:01:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:01:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:01:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2023-08-24 02:01:16,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385981308411215 [2023-08-24 02:01:16,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2023-08-24 02:01:16,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2023-08-24 02:01:16,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:16,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2023-08-24 02:01:16,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,163 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,163 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 92 flow. Second operand 5 states and 413 transitions. [2023-08-24 02:01:16,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 195 flow [2023-08-24 02:01:16,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 02:01:16,167 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 80 flow [2023-08-24 02:01:16,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-24 02:01:16,169 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-24 02:01:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 80 flow [2023-08-24 02:01:16,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:16,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:16,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 02:01:16,173 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 02:01:16,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:16,173 INFO L85 PathProgramCache]: Analyzing trace with hash 189432966, now seen corresponding path program 1 times [2023-08-24 02:01:16,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:16,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529183156] [2023-08-24 02:01:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:16,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:16,300 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 02:01:16,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529183156] [2023-08-24 02:01:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529183156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827156159] [2023-08-24 02:01:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:16,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:16,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:16,305 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 02:01:16,333 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 02:01:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:16,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:01:16,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:16,483 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 02:01:16,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827156159] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:16,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 02:01:16,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 02:01:16,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728060834] [2023-08-24 02:01:16,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:01:16,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:01:16,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:01:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 02:01:16,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:16,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:16,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:16,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:16,587 INFO L124 PetriNetUnfolderBase]: 68/122 cut-off events. [2023-08-24 02:01:16,588 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-24 02:01:16,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 122 events. 68/122 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 344 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 354. Up to 92 conditions per place. [2023-08-24 02:01:16,589 INFO L140 encePairwiseOnDemand]: 209/214 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-08-24 02:01:16,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 159 flow [2023-08-24 02:01:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:01:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:01:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 404 transitions. [2023-08-24 02:01:16,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775700934579439 [2023-08-24 02:01:16,591 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 404 transitions. [2023-08-24 02:01:16,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 404 transitions. [2023-08-24 02:01:16,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:16,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 404 transitions. [2023-08-24 02:01:16,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,595 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,595 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 80 flow. Second operand 5 states and 404 transitions. [2023-08-24 02:01:16,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 159 flow [2023-08-24 02:01:16,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-24 02:01:16,596 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-08-24 02:01:16,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-08-24 02:01:16,597 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 02:01:16,597 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-08-24 02:01:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:16,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:16,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:16,608 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 02:01:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:16,805 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 02:01:16,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash -596144770, now seen corresponding path program 1 times [2023-08-24 02:01:16,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:16,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787854377] [2023-08-24 02:01:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:16,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:16,901 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 02:01:16,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:16,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787854377] [2023-08-24 02:01:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787854377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:16,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689452617] [2023-08-24 02:01:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:16,910 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 02:01:16,936 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 02:01:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:17,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:01:17,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:17,051 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 02:01:17,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689452617] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:17,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 02:01:17,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 02:01:17,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572201417] [2023-08-24 02:01:17,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:01:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:01:17,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:01:17,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 02:01:17,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:17,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:17,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:17,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:17,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:17,160 INFO L124 PetriNetUnfolderBase]: 52/97 cut-off events. [2023-08-24 02:01:17,161 INFO L125 PetriNetUnfolderBase]: For 63/73 co-relation queries the response was YES. [2023-08-24 02:01:17,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 63/73 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 20 based on Foata normal form. 18/113 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-08-24 02:01:17,162 INFO L140 encePairwiseOnDemand]: 209/214 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-24 02:01:17,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-08-24 02:01:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:01:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:01:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 404 transitions. [2023-08-24 02:01:17,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775700934579439 [2023-08-24 02:01:17,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 404 transitions. [2023-08-24 02:01:17,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 404 transitions. [2023-08-24 02:01:17,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:17,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 404 transitions. [2023-08-24 02:01:17,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:17,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:17,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:17,170 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 404 transitions. [2023-08-24 02:01:17,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-08-24 02:01:17,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 02:01:17,173 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-08-24 02:01:17,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-24 02:01:17,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-24 02:01:17,178 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-08-24 02:01:17,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:17,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:17,179 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 02:01:17,187 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 02:01:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:17,385 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 02:01:17,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1929170136, now seen corresponding path program 1 times [2023-08-24 02:01:17,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:17,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650353704] [2023-08-24 02:01:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:17,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:18,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650353704] [2023-08-24 02:01:18,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650353704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:18,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735733294] [2023-08-24 02:01:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:18,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:18,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:18,062 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 02:01:18,065 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 02:01:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:18,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 02:01:18,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:18,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:01:18,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:01:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:01:18,319 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 02:01:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:18,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:18,560 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-08-24 02:01:18,585 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-08-24 02:01:18,600 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:18,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2023-08-24 02:01:18,606 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 286 treesize of output 254 [2023-08-24 02:01:18,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-08-24 02:01:18,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-24 02:01:18,646 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:18,647 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2023-08-24 02:01:18,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:18,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2023-08-24 02:01:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 02:01:18,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735733294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:18,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:18,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 02:01:18,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221979952] [2023-08-24 02:01:18,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:18,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 02:01:18,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 02:01:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=301, Unknown=10, NotChecked=74, Total=462 [2023-08-24 02:01:18,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:18,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:18,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:18,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:18,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:19,037 INFO L124 PetriNetUnfolderBase]: 110/198 cut-off events. [2023-08-24 02:01:19,038 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-24 02:01:19,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 600 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-08-24 02:01:19,039 INFO L140 encePairwiseOnDemand]: 207/214 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-08-24 02:01:19,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-08-24 02:01:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:01:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:01:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-08-24 02:01:19,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119158878504673 [2023-08-24 02:01:19,042 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-08-24 02:01:19,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-08-24 02:01:19,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:19,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-08-24 02:01:19,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:19,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:19,046 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:19,046 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-08-24 02:01:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-08-24 02:01:19,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 02:01:19,053 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-08-24 02:01:19,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-24 02:01:19,055 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-24 02:01:19,056 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-08-24 02:01:19,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:19,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:19,058 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 02:01:19,063 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 02:01:19,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:19,264 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 02:01:19,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1482654440, now seen corresponding path program 2 times [2023-08-24 02:01:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:19,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033225209] [2023-08-24 02:01:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:19,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:19,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:19,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033225209] [2023-08-24 02:01:19,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033225209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:19,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419266489] [2023-08-24 02:01:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:01:19,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:19,578 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 02:01:19,603 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 02:01:19,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:01:19,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:19,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 02:01:19,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:19,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:19,796 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:19,796 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 22 treesize of output 15 [2023-08-24 02:01:19,807 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:01:19,807 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 21 treesize of output 10 [2023-08-24 02:01:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:19,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419266489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:19,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:19,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 02:01:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777551096] [2023-08-24 02:01:19,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:19,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:01:19,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:01:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 02:01:19,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 02:01:19,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 75.81818181818181) internal successors, (834), 11 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:19,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:19,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 02:01:19,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:20,026 INFO L124 PetriNetUnfolderBase]: 137/246 cut-off events. [2023-08-24 02:01:20,026 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2023-08-24 02:01:20,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 773 event pairs, 27 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-08-24 02:01:20,028 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-08-24 02:01:20,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-08-24 02:01:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:20,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 02:01:20,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711615487316422 [2023-08-24 02:01:20,031 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 02:01:20,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 02:01:20,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:20,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 02:01:20,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:20,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:20,035 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:20,035 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 556 transitions. [2023-08-24 02:01:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-08-24 02:01:20,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 02:01:20,038 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-08-24 02:01:20,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-24 02:01:20,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-24 02:01:20,038 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-08-24 02:01:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.81818181818181) internal successors, (834), 11 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:20,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:20,039 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 02:01:20,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 02:01:20,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:20,246 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 02:01:20,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 146066334, now seen corresponding path program 3 times [2023-08-24 02:01:20,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:20,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049885250] [2023-08-24 02:01:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049885250] [2023-08-24 02:01:20,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049885250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:20,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215692737] [2023-08-24 02:01:20,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:01:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:20,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:20,549 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 02:01:20,572 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 02:01:20,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:01:20,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:20,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 02:01:20,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:20,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:20,806 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:20,806 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 22 treesize of output 15 [2023-08-24 02:01:20,816 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:01:20,816 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 21 treesize of output 10 [2023-08-24 02:01:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:20,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215692737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:20,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:20,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 02:01:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090065357] [2023-08-24 02:01:20,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:20,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:01:20,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:20,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:01:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 02:01:20,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 02:01:20,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:20,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:20,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 02:01:20,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:21,048 INFO L124 PetriNetUnfolderBase]: 153/275 cut-off events. [2023-08-24 02:01:21,049 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-24 02:01:21,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 275 events. 153/275 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 921 event pairs, 31 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 1053. Up to 219 conditions per place. [2023-08-24 02:01:21,051 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 46 selfloop transitions, 14 changer transitions 1/61 dead transitions. [2023-08-24 02:01:21,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 472 flow [2023-08-24 02:01:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 558 transitions. [2023-08-24 02:01:21,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724966622162884 [2023-08-24 02:01:21,053 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 558 transitions. [2023-08-24 02:01:21,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 558 transitions. [2023-08-24 02:01:21,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:21,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 558 transitions. [2023-08-24 02:01:21,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:21,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:21,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:21,058 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 558 transitions. [2023-08-24 02:01:21,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 472 flow [2023-08-24 02:01:21,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 02:01:21,061 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 334 flow [2023-08-24 02:01:21,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-08-24 02:01:21,062 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-24 02:01:21,062 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 334 flow [2023-08-24 02:01:21,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:21,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:21,062 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 02:01:21,073 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 02:01:21,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:21,268 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 02:01:21,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:21,269 INFO L85 PathProgramCache]: Analyzing trace with hash 278098124, now seen corresponding path program 4 times [2023-08-24 02:01:21,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:21,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960502704] [2023-08-24 02:01:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:21,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960502704] [2023-08-24 02:01:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960502704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194630787] [2023-08-24 02:01:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:01:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:21,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:21,583 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 02:01:21,585 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 02:01:21,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:01:21,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:21,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 02:01:21,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:21,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:21,795 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:21,795 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 22 treesize of output 15 [2023-08-24 02:01:21,806 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:01:21,806 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 21 treesize of output 10 [2023-08-24 02:01:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:21,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194630787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:21,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:21,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 02:01:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477742134] [2023-08-24 02:01:21,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:21,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:01:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:01:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 02:01:21,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 02:01:21,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 334 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:21,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:21,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 02:01:21,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:22,045 INFO L124 PetriNetUnfolderBase]: 175/314 cut-off events. [2023-08-24 02:01:22,045 INFO L125 PetriNetUnfolderBase]: For 759/759 co-relation queries the response was YES. [2023-08-24 02:01:22,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286 conditions, 314 events. 175/314 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1096 event pairs, 41 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1254. Up to 262 conditions per place. [2023-08-24 02:01:22,047 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 48 selfloop transitions, 14 changer transitions 1/63 dead transitions. [2023-08-24 02:01:22,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 540 flow [2023-08-24 02:01:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 02:01:22,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711615487316422 [2023-08-24 02:01:22,050 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 02:01:22,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 02:01:22,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:22,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 02:01:22,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:22,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:22,055 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:22,055 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 334 flow. Second operand 7 states and 556 transitions. [2023-08-24 02:01:22,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 540 flow [2023-08-24 02:01:22,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 504 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-24 02:01:22,059 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 380 flow [2023-08-24 02:01:22,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-24 02:01:22,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-08-24 02:01:22,060 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 380 flow [2023-08-24 02:01:22,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:22,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:22,061 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 02:01:22,070 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 02:01:22,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:22,267 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 02:01:22,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 711512376, now seen corresponding path program 5 times [2023-08-24 02:01:22,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:22,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323407485] [2023-08-24 02:01:22,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:22,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323407485] [2023-08-24 02:01:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323407485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:22,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073388370] [2023-08-24 02:01:22,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:01:22,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:22,597 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 02:01:22,623 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 02:01:22,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:01:22,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:22,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 02:01:22,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:22,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:22,856 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:22,856 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 17 treesize of output 14 [2023-08-24 02:01:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:22,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073388370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:22,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:22,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 02:01:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304482981] [2023-08-24 02:01:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:01:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:01:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-24 02:01:22,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 02:01:22,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 380 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:22,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:22,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 02:01:22,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:23,087 INFO L124 PetriNetUnfolderBase]: 209/373 cut-off events. [2023-08-24 02:01:23,088 INFO L125 PetriNetUnfolderBase]: For 1011/1011 co-relation queries the response was YES. [2023-08-24 02:01:23,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 373 events. 209/373 cut-off events. For 1011/1011 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1379 event pairs, 35 based on Foata normal form. 1/373 useless extension candidates. Maximal degree in co-relation 1519. Up to 301 conditions per place. [2023-08-24 02:01:23,090 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 50 selfloop transitions, 18 changer transitions 1/69 dead transitions. [2023-08-24 02:01:23,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 631 flow [2023-08-24 02:01:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 02:01:23,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711615487316422 [2023-08-24 02:01:23,093 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 02:01:23,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 02:01:23,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:23,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 02:01:23,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:23,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:23,097 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:23,097 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 380 flow. Second operand 7 states and 556 transitions. [2023-08-24 02:01:23,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 631 flow [2023-08-24 02:01:23,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 592 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-24 02:01:23,102 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 472 flow [2023-08-24 02:01:23,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-24 02:01:23,103 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-08-24 02:01:23,103 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 472 flow [2023-08-24 02:01:23,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:23,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:23,104 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 02:01:23,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 02:01:23,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:23,316 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 02:01:23,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash 818579478, now seen corresponding path program 6 times [2023-08-24 02:01:23,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:23,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474426911] [2023-08-24 02:01:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:23,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:23,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:23,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474426911] [2023-08-24 02:01:23,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474426911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:23,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057914139] [2023-08-24 02:01:23,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:01:23,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:23,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:23,571 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 02:01:23,596 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 02:01:23,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:01:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:23,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 02:01:23,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:23,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:23,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:23,780 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 22 treesize of output 15 [2023-08-24 02:01:23,791 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:01:23,791 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 21 treesize of output 10 [2023-08-24 02:01:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:23,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057914139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:23,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:23,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 02:01:23,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835773680] [2023-08-24 02:01:23,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:23,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:01:23,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:01:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 02:01:23,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 02:01:23,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 472 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:23,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:23,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 02:01:23,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:24,014 INFO L124 PetriNetUnfolderBase]: 225/402 cut-off events. [2023-08-24 02:01:24,014 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2023-08-24 02:01:24,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 402 events. 225/402 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1522 event pairs, 57 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1706. Up to 350 conditions per place. [2023-08-24 02:01:24,017 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 56 selfloop transitions, 14 changer transitions 1/71 dead transitions. [2023-08-24 02:01:24,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 698 flow [2023-08-24 02:01:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 554 transitions. [2023-08-24 02:01:24,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369826435246996 [2023-08-24 02:01:24,020 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 554 transitions. [2023-08-24 02:01:24,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 554 transitions. [2023-08-24 02:01:24,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:24,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 554 transitions. [2023-08-24 02:01:24,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,024 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,024 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 472 flow. Second operand 7 states and 554 transitions. [2023-08-24 02:01:24,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 698 flow [2023-08-24 02:01:24,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 631 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-24 02:01:24,034 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 496 flow [2023-08-24 02:01:24,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-08-24 02:01:24,035 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-08-24 02:01:24,036 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 496 flow [2023-08-24 02:01:24,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:24,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:24,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 02:01:24,242 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,SelfDestructingSolverStorable10 [2023-08-24 02:01:24,243 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 02:01:24,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -570248544, now seen corresponding path program 7 times [2023-08-24 02:01:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:24,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445588118] [2023-08-24 02:01:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445588118] [2023-08-24 02:01:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445588118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821389862] [2023-08-24 02:01:24,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:01:24,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:24,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:24,327 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 02:01:24,337 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 02:01:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:24,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:01:24,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:24,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821389862] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:24,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:24,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 02:01:24,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86295930] [2023-08-24 02:01:24,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:24,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 02:01:24,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 02:01:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 02:01:24,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:24,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 496 flow. Second operand has 14 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:24,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:24,727 INFO L124 PetriNetUnfolderBase]: 371/696 cut-off events. [2023-08-24 02:01:24,727 INFO L125 PetriNetUnfolderBase]: For 2458/2483 co-relation queries the response was YES. [2023-08-24 02:01:24,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2880 conditions, 696 events. 371/696 cut-off events. For 2458/2483 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3400 event pairs, 151 based on Foata normal form. 56/742 useless extension candidates. Maximal degree in co-relation 2504. Up to 378 conditions per place. [2023-08-24 02:01:24,732 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 97 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-08-24 02:01:24,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1184 flow [2023-08-24 02:01:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 575 transitions. [2023-08-24 02:01:24,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38384512683578104 [2023-08-24 02:01:24,735 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 575 transitions. [2023-08-24 02:01:24,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 575 transitions. [2023-08-24 02:01:24,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:24,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 575 transitions. [2023-08-24 02:01:24,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,741 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,741 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 496 flow. Second operand 7 states and 575 transitions. [2023-08-24 02:01:24,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1184 flow [2023-08-24 02:01:24,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 1084 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-08-24 02:01:24,752 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 664 flow [2023-08-24 02:01:24,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=664, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-24 02:01:24,752 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-24 02:01:24,752 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 664 flow [2023-08-24 02:01:24,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:24,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:24,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:24,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 02:01:24,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:24,959 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 02:01:24,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1307592954, now seen corresponding path program 8 times [2023-08-24 02:01:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:24,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934264587] [2023-08-24 02:01:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:25,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:25,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934264587] [2023-08-24 02:01:25,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934264587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:25,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844445764] [2023-08-24 02:01:25,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:01:25,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:25,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:25,059 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 02:01:25,068 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 02:01:25,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:01:25,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:25,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:01:25,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:25,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844445764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:25,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:25,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 02:01:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115027249] [2023-08-24 02:01:25,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:25,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 02:01:25,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:25,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 02:01:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 02:01:25,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:25,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 664 flow. Second operand has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:25,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:25,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:25,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:25,461 INFO L124 PetriNetUnfolderBase]: 305/610 cut-off events. [2023-08-24 02:01:25,461 INFO L125 PetriNetUnfolderBase]: For 1934/1959 co-relation queries the response was YES. [2023-08-24 02:01:25,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 610 events. 305/610 cut-off events. For 1934/1959 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3042 event pairs, 143 based on Foata normal form. 61/669 useless extension candidates. Maximal degree in co-relation 2214. Up to 380 conditions per place. [2023-08-24 02:01:25,466 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 52 selfloop transitions, 3 changer transitions 39/98 dead transitions. [2023-08-24 02:01:25,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 994 flow [2023-08-24 02:01:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:01:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:01:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2023-08-24 02:01:25,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38317757009345793 [2023-08-24 02:01:25,468 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2023-08-24 02:01:25,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2023-08-24 02:01:25,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:25,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2023-08-24 02:01:25,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:25,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:25,472 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:25,473 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 664 flow. Second operand 7 states and 574 transitions. [2023-08-24 02:01:25,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 994 flow [2023-08-24 02:01:25,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 976 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-24 02:01:25,483 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 541 flow [2023-08-24 02:01:25,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=541, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2023-08-24 02:01:25,484 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-08-24 02:01:25,484 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 541 flow [2023-08-24 02:01:25,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:25,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:25,484 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:25,493 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 02:01:25,690 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,SelfDestructingSolverStorable12 [2023-08-24 02:01:25,690 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 02:01:25,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1822216859, now seen corresponding path program 9 times [2023-08-24 02:01:25,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378270917] [2023-08-24 02:01:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:25,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378270917] [2023-08-24 02:01:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378270917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203679225] [2023-08-24 02:01:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:01:25,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:25,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:25,798 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 02:01:25,800 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 02:01:25,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:01:25,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:25,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:01:25,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:25,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:26,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203679225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:26,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:26,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-24 02:01:26,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783484139] [2023-08-24 02:01:26,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:26,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:01:26,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:26,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:01:26,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:01:26,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:26,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 541 flow. Second operand has 15 states, 15 states have (on average 78.06666666666666) internal successors, (1171), 15 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:26,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:26,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:26,206 INFO L124 PetriNetUnfolderBase]: 166/297 cut-off events. [2023-08-24 02:01:26,206 INFO L125 PetriNetUnfolderBase]: For 1513/1520 co-relation queries the response was YES. [2023-08-24 02:01:26,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 297 events. 166/297 cut-off events. For 1513/1520 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1047 event pairs, 28 based on Foata normal form. 51/347 useless extension candidates. Maximal degree in co-relation 1484. Up to 137 conditions per place. [2023-08-24 02:01:26,209 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 40 selfloop transitions, 26 changer transitions 0/70 dead transitions. [2023-08-24 02:01:26,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 757 flow [2023-08-24 02:01:26,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:01:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:01:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2023-08-24 02:01:26,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732476635514019 [2023-08-24 02:01:26,212 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2023-08-24 02:01:26,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2023-08-24 02:01:26,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:26,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2023-08-24 02:01:26,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,217 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,217 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 541 flow. Second operand 8 states and 639 transitions. [2023-08-24 02:01:26,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 757 flow [2023-08-24 02:01:26,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 607 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-08-24 02:01:26,223 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 491 flow [2023-08-24 02:01:26,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-24 02:01:26,224 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-24 02:01:26,224 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 491 flow [2023-08-24 02:01:26,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.06666666666666) internal successors, (1171), 15 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:26,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:26,233 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 02:01:26,430 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,SelfDestructingSolverStorable13 [2023-08-24 02:01:26,431 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 02:01:26,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1101918323, now seen corresponding path program 10 times [2023-08-24 02:01:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:26,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481612220] [2023-08-24 02:01:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:26,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:26,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:26,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481612220] [2023-08-24 02:01:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481612220] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:26,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137285728] [2023-08-24 02:01:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:01:26,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:26,512 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 02:01:26,536 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 02:01:26,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:01:26,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:26,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:01:26,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:26,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137285728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:26,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:26,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 02:01:26,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919472785] [2023-08-24 02:01:26,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:26,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 02:01:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 02:01:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 02:01:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:01:26,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 491 flow. Second operand has 14 states, 14 states have (on average 78.14285714285714) internal successors, (1094), 14 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:26,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:01:26,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:26,847 INFO L124 PetriNetUnfolderBase]: 120/214 cut-off events. [2023-08-24 02:01:26,848 INFO L125 PetriNetUnfolderBase]: For 1222/1228 co-relation queries the response was YES. [2023-08-24 02:01:26,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 214 events. 120/214 cut-off events. For 1222/1228 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 648 event pairs, 27 based on Foata normal form. 30/240 useless extension candidates. Maximal degree in co-relation 1110. Up to 116 conditions per place. [2023-08-24 02:01:26,850 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 41 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2023-08-24 02:01:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 709 flow [2023-08-24 02:01:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:01:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:01:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2023-08-24 02:01:26,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732476635514019 [2023-08-24 02:01:26,853 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2023-08-24 02:01:26,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2023-08-24 02:01:26,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:26,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2023-08-24 02:01:26,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,857 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,857 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 491 flow. Second operand 8 states and 639 transitions. [2023-08-24 02:01:26,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 709 flow [2023-08-24 02:01:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 627 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-24 02:01:26,862 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 505 flow [2023-08-24 02:01:26,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=505, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-24 02:01:26,863 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-08-24 02:01:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 505 flow [2023-08-24 02:01:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.14285714285714) internal successors, (1094), 14 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:26,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:26,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:26,872 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 02:01:27,069 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,SelfDestructingSolverStorable14 [2023-08-24 02:01:27,069 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 02:01:27,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1642242531, now seen corresponding path program 11 times [2023-08-24 02:01:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:27,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756026786] [2023-08-24 02:01:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756026786] [2023-08-24 02:01:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756026786] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382133199] [2023-08-24 02:01:27,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:01:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:27,853 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 02:01:27,873 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 02:01:27,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:01:27,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:27,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjunts are in the unsatisfiable core [2023-08-24 02:01:27,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:28,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:01:28,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:01:28,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:01:28,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-24 02:01:28,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:28,300 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,300 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 31 treesize of output 14 [2023-08-24 02:01:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:28,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:28,499 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_449 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse2))))) (forall ((v_ArrVal_449 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2))) (+ .cse0 c_~counter~0 1))))) is different from false [2023-08-24 02:01:28,510 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_~A~0.base)) (.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse2 (select .cse5 (+ c_~A~0.offset .cse6))) (.cse3 (select .cse5 (+ c_~A~0.offset .cse6 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_449 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1))) (+ .cse2 c_~counter~0 .cse3 1))) (forall ((v_ArrVal_449 (Array Int Int))) (<= (+ .cse2 c_~counter~0 .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1)))))))) is different from false [2023-08-24 02:01:28,520 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset 4)) (.cse5 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select .cse5 c_~A~0.offset)) (.cse1 (select .cse5 .cse3))) (and (forall ((v_ArrVal_449 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) (select .cse2 .cse3))))) (forall ((v_ArrVal_449 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse3))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-08-24 02:01:28,540 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_449 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_448))) (< (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse0 .cse1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse3 .cse1) c_~counter~0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) (forall ((v_ArrVal_449 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_448))) (<= (let ((.cse4 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse4 .cse1) c_~counter~0 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse6 (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse6 .cse1) (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))))) is different from false [2023-08-24 02:01:28,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 59 [2023-08-24 02:01:28,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,560 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 212 treesize of output 172 [2023-08-24 02:01:28,566 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,567 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 70 treesize of output 58 [2023-08-24 02:01:28,572 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,573 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 31 treesize of output 25 [2023-08-24 02:01:28,591 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,592 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 60 [2023-08-24 02:01:28,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:28,598 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:28,598 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 90 treesize of output 70 [2023-08-24 02:01:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-24 02:01:28,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382133199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:28,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:28,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2023-08-24 02:01:28,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64270545] [2023-08-24 02:01:28,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:28,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:01:28,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:28,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:01:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=665, Unknown=6, NotChecked=220, Total=992 [2023-08-24 02:01:28,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:01:28,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 505 flow. Second operand has 32 states, 32 states have (on average 54.5625) internal successors, (1746), 32 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:28,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:28,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:01:28,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:29,651 INFO L124 PetriNetUnfolderBase]: 179/316 cut-off events. [2023-08-24 02:01:29,652 INFO L125 PetriNetUnfolderBase]: For 1787/1787 co-relation queries the response was YES. [2023-08-24 02:01:29,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 316 events. 179/316 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1040 event pairs, 13 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1654. Up to 187 conditions per place. [2023-08-24 02:01:29,655 INFO L140 encePairwiseOnDemand]: 206/214 looper letters, 65 selfloop transitions, 38 changer transitions 1/104 dead transitions. [2023-08-24 02:01:29,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 948 flow [2023-08-24 02:01:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 02:01:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 02:01:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 983 transitions. [2023-08-24 02:01:29,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27020340846619023 [2023-08-24 02:01:29,659 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 983 transitions. [2023-08-24 02:01:29,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 983 transitions. [2023-08-24 02:01:29,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:29,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 983 transitions. [2023-08-24 02:01:29,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.8235294117647) internal successors, (983), 17 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:29,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:29,695 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:29,695 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 505 flow. Second operand 17 states and 983 transitions. [2023-08-24 02:01:29,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 948 flow [2023-08-24 02:01:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 104 transitions, 890 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-24 02:01:29,701 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 684 flow [2023-08-24 02:01:29,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=684, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2023-08-24 02:01:29,702 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-24 02:01:29,702 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 684 flow [2023-08-24 02:01:29,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 54.5625) internal successors, (1746), 32 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:29,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:29,715 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:29,735 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 02:01:29,921 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,SelfDestructingSolverStorable15 [2023-08-24 02:01:29,921 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 02:01:29,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:29,922 INFO L85 PathProgramCache]: Analyzing trace with hash -2141350869, now seen corresponding path program 12 times [2023-08-24 02:01:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:29,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471045996] [2023-08-24 02:01:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:29,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471045996] [2023-08-24 02:01:30,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471045996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570826816] [2023-08-24 02:01:30,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:01:30,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:30,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:30,578 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 02:01:30,581 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 02:01:30,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:01:30,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:30,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:30,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:30,791 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:30,791 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 31 treesize of output 14 [2023-08-24 02:01:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:30,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:30,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:30,946 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 36 treesize of output 44 [2023-08-24 02:01:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:31,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570826816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:31,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:31,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-08-24 02:01:31,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16715191] [2023-08-24 02:01:31,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:31,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:01:31,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:31,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:01:31,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:01:31,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:31,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 684 flow. Second operand has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:31,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:31,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:31,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:31,559 INFO L124 PetriNetUnfolderBase]: 243/425 cut-off events. [2023-08-24 02:01:31,560 INFO L125 PetriNetUnfolderBase]: For 2737/2737 co-relation queries the response was YES. [2023-08-24 02:01:31,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 425 events. 243/425 cut-off events. For 2737/2737 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1500 event pairs, 29 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 2365. Up to 314 conditions per place. [2023-08-24 02:01:31,563 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 81 selfloop transitions, 40 changer transitions 4/125 dead transitions. [2023-08-24 02:01:31,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 125 transitions, 1311 flow [2023-08-24 02:01:31,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 02:01:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 02:01:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1107 transitions. [2023-08-24 02:01:31,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3042880703683343 [2023-08-24 02:01:31,566 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1107 transitions. [2023-08-24 02:01:31,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1107 transitions. [2023-08-24 02:01:31,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:31,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1107 transitions. [2023-08-24 02:01:31,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.11764705882354) internal successors, (1107), 17 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:31,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:31,576 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:31,576 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 684 flow. Second operand 17 states and 1107 transitions. [2023-08-24 02:01:31,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 125 transitions, 1311 flow [2023-08-24 02:01:31,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 125 transitions, 1172 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-08-24 02:01:31,586 INFO L231 Difference]: Finished difference. Result has 100 places, 92 transitions, 976 flow [2023-08-24 02:01:31,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=976, PETRI_PLACES=100, PETRI_TRANSITIONS=92} [2023-08-24 02:01:31,586 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-08-24 02:01:31,587 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 92 transitions, 976 flow [2023-08-24 02:01:31,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:31,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:31,587 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:31,599 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 02:01:31,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:31,793 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 02:01:31,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -466173589, now seen corresponding path program 13 times [2023-08-24 02:01:31,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:31,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062069630] [2023-08-24 02:01:31,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:31,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:32,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062069630] [2023-08-24 02:01:32,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062069630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:32,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751941948] [2023-08-24 02:01:32,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:01:32,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:32,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:32,428 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 02:01:32,447 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 02:01:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:32,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 02:01:32,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:32,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:32,896 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:32,897 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 36 treesize of output 44 [2023-08-24 02:01:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:32,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751941948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:32,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 02:01:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761993826] [2023-08-24 02:01:32,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:32,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:01:32,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:32,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:01:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:01:32,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:32,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 976 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:32,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:32,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:32,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:33,835 INFO L124 PetriNetUnfolderBase]: 296/514 cut-off events. [2023-08-24 02:01:33,835 INFO L125 PetriNetUnfolderBase]: For 3740/3740 co-relation queries the response was YES. [2023-08-24 02:01:33,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 514 events. 296/514 cut-off events. For 3740/3740 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1887 event pairs, 38 based on Foata normal form. 2/516 useless extension candidates. Maximal degree in co-relation 3081. Up to 396 conditions per place. [2023-08-24 02:01:33,840 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 86 selfloop transitions, 50 changer transitions 2/138 dead transitions. [2023-08-24 02:01:33,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 138 transitions, 1578 flow [2023-08-24 02:01:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 02:01:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 02:01:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1418 transitions. [2023-08-24 02:01:33,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011894647408666 [2023-08-24 02:01:33,843 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1418 transitions. [2023-08-24 02:01:33,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1418 transitions. [2023-08-24 02:01:33,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:33,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1418 transitions. [2023-08-24 02:01:33,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.45454545454545) internal successors, (1418), 22 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:33,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 214.0) internal successors, (4922), 23 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:33,850 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 214.0) internal successors, (4922), 23 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:33,851 INFO L175 Difference]: Start difference. First operand has 100 places, 92 transitions, 976 flow. Second operand 22 states and 1418 transitions. [2023-08-24 02:01:33,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 138 transitions, 1578 flow [2023-08-24 02:01:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1374 flow, removed 92 selfloop flow, removed 6 redundant places. [2023-08-24 02:01:33,865 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 1109 flow [2023-08-24 02:01:33,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1109, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2023-08-24 02:01:33,865 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 99 predicate places. [2023-08-24 02:01:33,865 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 1109 flow [2023-08-24 02:01:33,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:33,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:33,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:33,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 02:01:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 02:01:34,072 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 02:01:34,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 157475593, now seen corresponding path program 14 times [2023-08-24 02:01:34,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:34,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067310408] [2023-08-24 02:01:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:34,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:34,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:34,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067310408] [2023-08-24 02:01:34,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067310408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:34,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330773800] [2023-08-24 02:01:34,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:01:34,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:34,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:34,876 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 02:01:34,878 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 02:01:35,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:01:35,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:35,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:35,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:35,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:35,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:35,299 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 45 [2023-08-24 02:01:35,349 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:01:35,353 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 43 treesize of output 18 [2023-08-24 02:01:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:35,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330773800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:35,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:35,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-08-24 02:01:35,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203921780] [2023-08-24 02:01:35,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:35,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:01:35,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:35,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:01:35,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:01:35,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:01:35,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 1109 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:35,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:35,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:01:35,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:36,504 INFO L124 PetriNetUnfolderBase]: 371/633 cut-off events. [2023-08-24 02:01:36,505 INFO L125 PetriNetUnfolderBase]: For 5554/5554 co-relation queries the response was YES. [2023-08-24 02:01:36,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 633 events. 371/633 cut-off events. For 5554/5554 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2412 event pairs, 52 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3957. Up to 521 conditions per place. [2023-08-24 02:01:36,512 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 110 selfloop transitions, 48 changer transitions 2/160 dead transitions. [2023-08-24 02:01:36,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 160 transitions, 1973 flow [2023-08-24 02:01:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:01:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:01:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1206 transitions. [2023-08-24 02:01:36,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2683578104138852 [2023-08-24 02:01:36,514 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1206 transitions. [2023-08-24 02:01:36,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1206 transitions. [2023-08-24 02:01:36,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:36,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1206 transitions. [2023-08-24 02:01:36,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.42857142857143) internal successors, (1206), 21 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:36,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:36,521 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:36,521 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 1109 flow. Second operand 21 states and 1206 transitions. [2023-08-24 02:01:36,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 160 transitions, 1973 flow [2023-08-24 02:01:36,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1750 flow, removed 76 selfloop flow, removed 18 redundant places. [2023-08-24 02:01:36,536 INFO L231 Difference]: Finished difference. Result has 129 places, 130 transitions, 1486 flow [2023-08-24 02:01:36,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1486, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2023-08-24 02:01:36,537 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 108 predicate places. [2023-08-24 02:01:36,537 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 1486 flow [2023-08-24 02:01:36,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:36,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:36,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:36,546 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 02:01:36,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:36,744 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 02:01:36,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:36,744 INFO L85 PathProgramCache]: Analyzing trace with hash -683630431, now seen corresponding path program 15 times [2023-08-24 02:01:36,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:36,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173558097] [2023-08-24 02:01:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173558097] [2023-08-24 02:01:37,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173558097] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:37,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649746691] [2023-08-24 02:01:37,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:01:37,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:37,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:37,337 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 02:01:37,355 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 02:01:37,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:01:37,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:37,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:37,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:37,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:37,773 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:37,773 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 45 [2023-08-24 02:01:37,832 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:01:37,833 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 43 treesize of output 18 [2023-08-24 02:01:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:37,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649746691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:37,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:37,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-24 02:01:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790252519] [2023-08-24 02:01:37,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:37,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:01:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:01:37,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:01:37,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:37,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 1486 flow. Second operand has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:37,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:37,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:37,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:38,593 INFO L124 PetriNetUnfolderBase]: 453/774 cut-off events. [2023-08-24 02:01:38,593 INFO L125 PetriNetUnfolderBase]: For 8111/8111 co-relation queries the response was YES. [2023-08-24 02:01:38,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5198 conditions, 774 events. 453/774 cut-off events. For 8111/8111 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3185 event pairs, 69 based on Foata normal form. 3/777 useless extension candidates. Maximal degree in co-relation 5125. Up to 641 conditions per place. [2023-08-24 02:01:38,602 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 147 selfloop transitions, 36 changer transitions 3/186 dead transitions. [2023-08-24 02:01:38,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 2476 flow [2023-08-24 02:01:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:01:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:01:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1230 transitions. [2023-08-24 02:01:38,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025086079685194 [2023-08-24 02:01:38,604 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1230 transitions. [2023-08-24 02:01:38,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1230 transitions. [2023-08-24 02:01:38,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:38,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1230 transitions. [2023-08-24 02:01:38,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.73684210526316) internal successors, (1230), 19 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:38,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:38,611 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:38,611 INFO L175 Difference]: Start difference. First operand has 129 places, 130 transitions, 1486 flow. Second operand 19 states and 1230 transitions. [2023-08-24 02:01:38,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 2476 flow [2023-08-24 02:01:38,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 2089 flow, removed 177 selfloop flow, removed 11 redundant places. [2023-08-24 02:01:38,635 INFO L231 Difference]: Finished difference. Result has 142 places, 149 transitions, 1630 flow [2023-08-24 02:01:38,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1630, PETRI_PLACES=142, PETRI_TRANSITIONS=149} [2023-08-24 02:01:38,636 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-08-24 02:01:38,636 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 149 transitions, 1630 flow [2023-08-24 02:01:38,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:38,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:38,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:38,645 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 02:01:38,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:38,843 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 02:01:38,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1814150431, now seen corresponding path program 16 times [2023-08-24 02:01:38,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:38,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422527613] [2023-08-24 02:01:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:38,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:39,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:39,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422527613] [2023-08-24 02:01:39,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422527613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:39,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547137275] [2023-08-24 02:01:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:01:39,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:39,397 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 02:01:39,400 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 02:01:39,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:01:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:39,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:39,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:39,701 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:39,703 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:39,704 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 31 treesize of output 14 [2023-08-24 02:01:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:39,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:39,843 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:39,844 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 45 [2023-08-24 02:01:39,898 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:01:39,898 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 43 treesize of output 18 [2023-08-24 02:01:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:39,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547137275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:39,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:39,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-24 02:01:39,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883160695] [2023-08-24 02:01:39,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:39,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:01:39,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:01:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:01:39,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:39,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 149 transitions, 1630 flow. Second operand has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:39,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:39,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:39,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:40,618 INFO L124 PetriNetUnfolderBase]: 510/871 cut-off events. [2023-08-24 02:01:40,619 INFO L125 PetriNetUnfolderBase]: For 10065/10065 co-relation queries the response was YES. [2023-08-24 02:01:40,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 871 events. 510/871 cut-off events. For 10065/10065 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3730 event pairs, 75 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 5746. Up to 749 conditions per place. [2023-08-24 02:01:40,629 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 151 selfloop transitions, 48 changer transitions 2/201 dead transitions. [2023-08-24 02:01:40,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2564 flow [2023-08-24 02:01:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:01:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:01:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-08-24 02:01:40,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30324643384161337 [2023-08-24 02:01:40,632 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-08-24 02:01:40,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-08-24 02:01:40,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:40,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-08-24 02:01:40,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:40,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:40,638 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:40,639 INFO L175 Difference]: Start difference. First operand has 142 places, 149 transitions, 1630 flow. Second operand 19 states and 1233 transitions. [2023-08-24 02:01:40,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2564 flow [2023-08-24 02:01:40,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 201 transitions, 2166 flow, removed 185 selfloop flow, removed 9 redundant places. [2023-08-24 02:01:40,668 INFO L231 Difference]: Finished difference. Result has 157 places, 167 transitions, 1755 flow [2023-08-24 02:01:40,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1755, PETRI_PLACES=157, PETRI_TRANSITIONS=167} [2023-08-24 02:01:40,669 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-08-24 02:01:40,669 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 167 transitions, 1755 flow [2023-08-24 02:01:40,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:40,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:40,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:40,680 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 02:01:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:40,875 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 02:01:40,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1547191255, now seen corresponding path program 17 times [2023-08-24 02:01:40,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:40,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232657021] [2023-08-24 02:01:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:40,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:41,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232657021] [2023-08-24 02:01:41,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232657021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370553247] [2023-08-24 02:01:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:01:41,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:41,622 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 02:01:41,644 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 02:01:41,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:01:41,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:41,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 02:01:41,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:41,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:42,076 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:42,077 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 45 [2023-08-24 02:01:42,129 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:01:42,129 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 43 treesize of output 18 [2023-08-24 02:01:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370553247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:42,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2023-08-24 02:01:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077064056] [2023-08-24 02:01:42,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:42,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 02:01:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 02:01:42,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-24 02:01:42,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:01:42,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 167 transitions, 1755 flow. Second operand has 27 states, 27 states have (on average 54.77777777777778) internal successors, (1479), 27 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:42,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:42,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:01:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:43,351 INFO L124 PetriNetUnfolderBase]: 569/982 cut-off events. [2023-08-24 02:01:43,351 INFO L125 PetriNetUnfolderBase]: For 14171/14171 co-relation queries the response was YES. [2023-08-24 02:01:43,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6803 conditions, 982 events. 569/982 cut-off events. For 14171/14171 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4436 event pairs, 104 based on Foata normal form. 2/982 useless extension candidates. Maximal degree in co-relation 6717. Up to 834 conditions per place. [2023-08-24 02:01:43,364 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 165 selfloop transitions, 52 changer transitions 4/221 dead transitions. [2023-08-24 02:01:43,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 221 transitions, 2711 flow [2023-08-24 02:01:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:01:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:01:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1212 transitions. [2023-08-24 02:01:43,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2696929238985314 [2023-08-24 02:01:43,367 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1212 transitions. [2023-08-24 02:01:43,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1212 transitions. [2023-08-24 02:01:43,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:43,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1212 transitions. [2023-08-24 02:01:43,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.714285714285715) internal successors, (1212), 21 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:43,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:43,375 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:43,375 INFO L175 Difference]: Start difference. First operand has 157 places, 167 transitions, 1755 flow. Second operand 21 states and 1212 transitions. [2023-08-24 02:01:43,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 221 transitions, 2711 flow [2023-08-24 02:01:43,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 221 transitions, 2454 flow, removed 111 selfloop flow, removed 11 redundant places. [2023-08-24 02:01:43,417 INFO L231 Difference]: Finished difference. Result has 171 places, 180 transitions, 1958 flow [2023-08-24 02:01:43,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1958, PETRI_PLACES=171, PETRI_TRANSITIONS=180} [2023-08-24 02:01:43,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-08-24 02:01:43,418 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 180 transitions, 1958 flow [2023-08-24 02:01:43,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.77777777777778) internal successors, (1479), 27 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:43,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:43,419 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:43,425 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 02:01:43,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:43,625 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 02:01:43,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash -763165645, now seen corresponding path program 18 times [2023-08-24 02:01:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:43,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488610200] [2023-08-24 02:01:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:44,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488610200] [2023-08-24 02:01:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488610200] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:44,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505743191] [2023-08-24 02:01:44,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:01:44,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:44,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:44,250 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 02:01:44,257 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 02:01:44,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:01:44,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:44,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-24 02:01:44,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:44,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:01:44,476 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 02:01:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:44,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:44,740 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_688 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_688) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2))))) (forall ((v_ArrVal_688 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_688) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2)) (+ (select .cse3 .cse1) c_~counter~0 1)))))) is different from false [2023-08-24 02:01:44,764 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:44,764 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 73 [2023-08-24 02:01:44,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:44,780 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 25 treesize of output 31 [2023-08-24 02:01:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:44,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505743191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:44,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:44,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-24 02:01:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592299709] [2023-08-24 02:01:44,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:44,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 02:01:44,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:44,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 02:01:44,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=707, Unknown=1, NotChecked=54, Total=870 [2023-08-24 02:01:44,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 02:01:44,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 180 transitions, 1958 flow. Second operand has 30 states, 30 states have (on average 57.666666666666664) internal successors, (1730), 30 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:44,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:44,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 02:01:44,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:45,766 INFO L124 PetriNetUnfolderBase]: 619/1061 cut-off events. [2023-08-24 02:01:45,767 INFO L125 PetriNetUnfolderBase]: For 16944/16944 co-relation queries the response was YES. [2023-08-24 02:01:45,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1061 events. 619/1061 cut-off events. For 16944/16944 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4855 event pairs, 93 based on Foata normal form. 1/1062 useless extension candidates. Maximal degree in co-relation 7481. Up to 874 conditions per place. [2023-08-24 02:01:45,782 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 154 selfloop transitions, 73 changer transitions 1/228 dead transitions. [2023-08-24 02:01:45,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2988 flow [2023-08-24 02:01:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 02:01:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 02:01:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1208 transitions. [2023-08-24 02:01:45,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2822429906542056 [2023-08-24 02:01:45,784 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1208 transitions. [2023-08-24 02:01:45,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1208 transitions. [2023-08-24 02:01:45,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:45,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1208 transitions. [2023-08-24 02:01:45,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.4) internal successors, (1208), 20 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:45,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:45,791 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:45,791 INFO L175 Difference]: Start difference. First operand has 171 places, 180 transitions, 1958 flow. Second operand 20 states and 1208 transitions. [2023-08-24 02:01:45,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2988 flow [2023-08-24 02:01:45,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 228 transitions, 2727 flow, removed 105 selfloop flow, removed 15 redundant places. [2023-08-24 02:01:45,840 INFO L231 Difference]: Finished difference. Result has 180 places, 200 transitions, 2387 flow [2023-08-24 02:01:45,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2387, PETRI_PLACES=180, PETRI_TRANSITIONS=200} [2023-08-24 02:01:45,841 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-08-24 02:01:45,841 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 200 transitions, 2387 flow [2023-08-24 02:01:45,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 57.666666666666664) internal successors, (1730), 30 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:45,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:45,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:45,848 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 02:01:46,047 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,SelfDestructingSolverStorable22 [2023-08-24 02:01:46,048 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 02:01:46,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 43558707, now seen corresponding path program 19 times [2023-08-24 02:01:46,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:46,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949763968] [2023-08-24 02:01:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:46,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:46,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949763968] [2023-08-24 02:01:46,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949763968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119506681] [2023-08-24 02:01:46,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:01:46,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:46,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:46,597 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 02:01:46,616 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 02:01:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:46,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 02:01:46,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:46,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:47,033 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:47,033 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 45 [2023-08-24 02:01:47,080 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:01:47,080 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 43 treesize of output 18 [2023-08-24 02:01:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119506681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:47,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:47,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 02:01:47,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171386597] [2023-08-24 02:01:47,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:47,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:01:47,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:47,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:01:47,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:01:47,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:47,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 200 transitions, 2387 flow. Second operand has 26 states, 26 states have (on average 61.96153846153846) internal successors, (1611), 26 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:47,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:47,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:47,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:47,821 INFO L124 PetriNetUnfolderBase]: 685/1172 cut-off events. [2023-08-24 02:01:47,821 INFO L125 PetriNetUnfolderBase]: For 22325/22325 co-relation queries the response was YES. [2023-08-24 02:01:47,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 1172 events. 685/1172 cut-off events. For 22325/22325 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5481 event pairs, 115 based on Foata normal form. 2/1174 useless extension candidates. Maximal degree in co-relation 8835. Up to 1060 conditions per place. [2023-08-24 02:01:47,835 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 204 selfloop transitions, 48 changer transitions 4/256 dead transitions. [2023-08-24 02:01:47,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 256 transitions, 3711 flow [2023-08-24 02:01:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:01:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:01:47,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1230 transitions. [2023-08-24 02:01:47,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025086079685194 [2023-08-24 02:01:47,847 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1230 transitions. [2023-08-24 02:01:47,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1230 transitions. [2023-08-24 02:01:47,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:47,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1230 transitions. [2023-08-24 02:01:47,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.73684210526316) internal successors, (1230), 19 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:47,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:47,853 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:47,853 INFO L175 Difference]: Start difference. First operand has 180 places, 200 transitions, 2387 flow. Second operand 19 states and 1230 transitions. [2023-08-24 02:01:47,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 256 transitions, 3711 flow [2023-08-24 02:01:47,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 256 transitions, 3232 flow, removed 206 selfloop flow, removed 13 redundant places. [2023-08-24 02:01:47,932 INFO L231 Difference]: Finished difference. Result has 192 places, 227 transitions, 2727 flow [2023-08-24 02:01:47,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2727, PETRI_PLACES=192, PETRI_TRANSITIONS=227} [2023-08-24 02:01:47,933 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-08-24 02:01:47,933 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 227 transitions, 2727 flow [2023-08-24 02:01:47,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.96153846153846) internal successors, (1611), 26 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:47,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:47,933 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:47,942 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 02:01:48,142 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,SelfDestructingSolverStorable23 [2023-08-24 02:01:48,142 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 02:01:48,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:48,142 INFO L85 PathProgramCache]: Analyzing trace with hash 806555017, now seen corresponding path program 20 times [2023-08-24 02:01:48,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:48,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105113750] [2023-08-24 02:01:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:48,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105113750] [2023-08-24 02:01:48,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105113750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:48,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830894844] [2023-08-24 02:01:48,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:01:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:48,771 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 02:01:48,773 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 02:01:48,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:01:48,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:48,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-24 02:01:48,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:48,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:01:48,975 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 02:01:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:49,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:49,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:49,305 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 73 [2023-08-24 02:01:49,320 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:49,321 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 25 treesize of output 31 [2023-08-24 02:01:49,382 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:01:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830894844] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:49,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:49,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-24 02:01:49,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254452858] [2023-08-24 02:01:49,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:49,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 02:01:49,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:49,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 02:01:49,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=759, Unknown=5, NotChecked=0, Total=870 [2023-08-24 02:01:49,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 02:01:49,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 227 transitions, 2727 flow. Second operand has 30 states, 30 states have (on average 57.56666666666667) internal successors, (1727), 30 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:49,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:49,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 02:01:49,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:50,452 INFO L124 PetriNetUnfolderBase]: 720/1234 cut-off events. [2023-08-24 02:01:50,453 INFO L125 PetriNetUnfolderBase]: For 23273/23273 co-relation queries the response was YES. [2023-08-24 02:01:50,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 1234 events. 720/1234 cut-off events. For 23273/23273 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5868 event pairs, 99 based on Foata normal form. 1/1233 useless extension candidates. Maximal degree in co-relation 9116. Up to 954 conditions per place. [2023-08-24 02:01:50,466 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 158 selfloop transitions, 104 changer transitions 1/263 dead transitions. [2023-08-24 02:01:50,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 263 transitions, 3742 flow [2023-08-24 02:01:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 02:01:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 02:01:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1207 transitions. [2023-08-24 02:01:50,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820093457943925 [2023-08-24 02:01:50,474 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1207 transitions. [2023-08-24 02:01:50,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1207 transitions. [2023-08-24 02:01:50,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:50,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1207 transitions. [2023-08-24 02:01:50,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.35) internal successors, (1207), 20 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:50,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:50,486 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:50,486 INFO L175 Difference]: Start difference. First operand has 192 places, 227 transitions, 2727 flow. Second operand 20 states and 1207 transitions. [2023-08-24 02:01:50,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 263 transitions, 3742 flow [2023-08-24 02:01:50,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 263 transitions, 3274 flow, removed 223 selfloop flow, removed 7 redundant places. [2023-08-24 02:01:50,547 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 2807 flow [2023-08-24 02:01:50,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2807, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2023-08-24 02:01:50,547 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-08-24 02:01:50,547 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 2807 flow [2023-08-24 02:01:50,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 57.56666666666667) internal successors, (1727), 30 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:50,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:50,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:50,555 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 02:01:50,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:50,749 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 02:01:50,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:50,749 INFO L85 PathProgramCache]: Analyzing trace with hash -779110419, now seen corresponding path program 21 times [2023-08-24 02:01:50,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:50,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026159927] [2023-08-24 02:01:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:51,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:51,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026159927] [2023-08-24 02:01:51,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026159927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:51,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180173127] [2023-08-24 02:01:51,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:01:51,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:51,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:51,260 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 02:01:51,261 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 02:01:51,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:01:51,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:51,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:51,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:51,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:51,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:51,624 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 35 treesize of output 43 [2023-08-24 02:01:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:51,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180173127] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:51,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 21 [2023-08-24 02:01:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18745204] [2023-08-24 02:01:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:51,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 02:01:51,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 02:01:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-24 02:01:51,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:51,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 2807 flow. Second operand has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:51,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:51,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:51,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:52,434 INFO L124 PetriNetUnfolderBase]: 754/1293 cut-off events. [2023-08-24 02:01:52,434 INFO L125 PetriNetUnfolderBase]: For 23986/23986 co-relation queries the response was YES. [2023-08-24 02:01:52,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9553 conditions, 1293 events. 754/1293 cut-off events. For 23986/23986 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6237 event pairs, 122 based on Foata normal form. 1/1292 useless extension candidates. Maximal degree in co-relation 9446. Up to 1170 conditions per place. [2023-08-24 02:01:52,448 INFO L140 encePairwiseOnDemand]: 206/214 looper letters, 218 selfloop transitions, 47 changer transitions 1/266 dead transitions. [2023-08-24 02:01:52,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 266 transitions, 3734 flow [2023-08-24 02:01:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:01:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:01:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1027 transitions. [2023-08-24 02:01:52,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29994158878504673 [2023-08-24 02:01:52,450 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1027 transitions. [2023-08-24 02:01:52,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1027 transitions. [2023-08-24 02:01:52,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:52,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1027 transitions. [2023-08-24 02:01:52,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.1875) internal successors, (1027), 16 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:52,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 214.0) internal successors, (3638), 17 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:52,455 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 214.0) internal successors, (3638), 17 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:52,455 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 2807 flow. Second operand 16 states and 1027 transitions. [2023-08-24 02:01:52,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 266 transitions, 3734 flow [2023-08-24 02:01:52,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 266 transitions, 3428 flow, removed 101 selfloop flow, removed 17 redundant places. [2023-08-24 02:01:52,527 INFO L231 Difference]: Finished difference. Result has 209 places, 245 transitions, 2857 flow [2023-08-24 02:01:52,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2857, PETRI_PLACES=209, PETRI_TRANSITIONS=245} [2023-08-24 02:01:52,528 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 188 predicate places. [2023-08-24 02:01:52,528 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 245 transitions, 2857 flow [2023-08-24 02:01:52,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:52,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:52,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:52,533 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 02:01:52,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:52,729 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 02:01:52,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1137570005, now seen corresponding path program 22 times [2023-08-24 02:01:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:52,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680427676] [2023-08-24 02:01:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:52,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:53,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:53,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680427676] [2023-08-24 02:01:53,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680427676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:53,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837692895] [2023-08-24 02:01:53,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:01:53,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:53,237 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 02:01:53,263 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 02:01:53,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:01:53,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:53,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 02:01:53,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:53,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:53,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:53,705 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 35 treesize of output 43 [2023-08-24 02:01:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:53,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837692895] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:53,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:53,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 02:01:53,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892463943] [2023-08-24 02:01:53,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:53,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:01:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:01:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:01:53,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:53,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 245 transitions, 2857 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:53,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:53,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:53,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:54,514 INFO L124 PetriNetUnfolderBase]: 807/1382 cut-off events. [2023-08-24 02:01:54,514 INFO L125 PetriNetUnfolderBase]: For 25146/25146 co-relation queries the response was YES. [2023-08-24 02:01:54,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10357 conditions, 1382 events. 807/1382 cut-off events. For 25146/25146 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6773 event pairs, 140 based on Foata normal form. 2/1382 useless extension candidates. Maximal degree in co-relation 10249. Up to 1269 conditions per place. [2023-08-24 02:01:54,530 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 236 selfloop transitions, 50 changer transitions 4/290 dead transitions. [2023-08-24 02:01:54,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 290 transitions, 4190 flow [2023-08-24 02:01:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:01:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:01:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1223 transitions. [2023-08-24 02:01:54,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30078701426463356 [2023-08-24 02:01:54,532 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1223 transitions. [2023-08-24 02:01:54,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1223 transitions. [2023-08-24 02:01:54,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:54,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1223 transitions. [2023-08-24 02:01:54,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.36842105263158) internal successors, (1223), 19 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:54,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:54,537 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:54,537 INFO L175 Difference]: Start difference. First operand has 209 places, 245 transitions, 2857 flow. Second operand 19 states and 1223 transitions. [2023-08-24 02:01:54,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 290 transitions, 4190 flow [2023-08-24 02:01:54,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 290 transitions, 3982 flow, removed 77 selfloop flow, removed 11 redundant places. [2023-08-24 02:01:54,597 INFO L231 Difference]: Finished difference. Result has 221 places, 264 transitions, 3393 flow [2023-08-24 02:01:54,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3393, PETRI_PLACES=221, PETRI_TRANSITIONS=264} [2023-08-24 02:01:54,598 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-08-24 02:01:54,598 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 264 transitions, 3393 flow [2023-08-24 02:01:54,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:54,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:54,598 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:54,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 02:01:54,804 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,SelfDestructingSolverStorable26 [2023-08-24 02:01:54,804 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 02:01:54,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1480436073, now seen corresponding path program 23 times [2023-08-24 02:01:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:54,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849597677] [2023-08-24 02:01:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:54,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:55,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:55,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849597677] [2023-08-24 02:01:55,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849597677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:55,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221575579] [2023-08-24 02:01:55,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:01:55,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:55,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:55,329 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 02:01:55,351 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 02:01:55,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:01:55,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:55,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 02:01:55,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:01:55,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:55,721 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:55,721 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 35 treesize of output 43 [2023-08-24 02:01:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221575579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:55,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:55,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 02:01:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960529105] [2023-08-24 02:01:55,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:55,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:01:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:01:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:01:55,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:01:55,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 264 transitions, 3393 flow. Second operand has 26 states, 26 states have (on average 61.84615384615385) internal successors, (1608), 26 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:55,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:55,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:01:55,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:56,730 INFO L124 PetriNetUnfolderBase]: 872/1495 cut-off events. [2023-08-24 02:01:56,730 INFO L125 PetriNetUnfolderBase]: For 32904/32904 co-relation queries the response was YES. [2023-08-24 02:01:56,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12007 conditions, 1495 events. 872/1495 cut-off events. For 32904/32904 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7515 event pairs, 149 based on Foata normal form. 2/1495 useless extension candidates. Maximal degree in co-relation 11894. Up to 1341 conditions per place. [2023-08-24 02:01:56,745 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 249 selfloop transitions, 65 changer transitions 2/316 dead transitions. [2023-08-24 02:01:56,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 316 transitions, 4703 flow [2023-08-24 02:01:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 02:01:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 02:01:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1611 transitions. [2023-08-24 02:01:56,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011214953271028 [2023-08-24 02:01:56,755 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1611 transitions. [2023-08-24 02:01:56,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1611 transitions. [2023-08-24 02:01:56,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:56,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1611 transitions. [2023-08-24 02:01:56,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.44) internal successors, (1611), 25 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:56,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:56,761 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:56,762 INFO L175 Difference]: Start difference. First operand has 221 places, 264 transitions, 3393 flow. Second operand 25 states and 1611 transitions. [2023-08-24 02:01:56,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 316 transitions, 4703 flow [2023-08-24 02:01:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 316 transitions, 4180 flow, removed 241 selfloop flow, removed 11 redundant places. [2023-08-24 02:01:56,877 INFO L231 Difference]: Finished difference. Result has 240 places, 279 transitions, 3482 flow [2023-08-24 02:01:56,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3482, PETRI_PLACES=240, PETRI_TRANSITIONS=279} [2023-08-24 02:01:56,877 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-08-24 02:01:56,877 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 279 transitions, 3482 flow [2023-08-24 02:01:56,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.84615384615385) internal successors, (1608), 26 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:56,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:56,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:56,886 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 02:01:57,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 02:01:57,084 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 02:01:57,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2017810507, now seen corresponding path program 24 times [2023-08-24 02:01:57,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:57,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287006445] [2023-08-24 02:01:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:57,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:57,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287006445] [2023-08-24 02:01:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287006445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491012397] [2023-08-24 02:01:57,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:01:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:57,699 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 02:01:57,701 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 02:01:57,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:01:57,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:01:57,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:57,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:01:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:57,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:01:58,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:01:58,092 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 45 [2023-08-24 02:01:58,141 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:01:58,141 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 43 treesize of output 18 [2023-08-24 02:01:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:01:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491012397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:01:58,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:01:58,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-08-24 02:01:58,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683101071] [2023-08-24 02:01:58,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:01:58,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:01:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:01:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:01:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:01:58,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:01:58,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 279 transitions, 3482 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:58,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:01:58,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:01:58,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:01:58,818 INFO L124 PetriNetUnfolderBase]: 925/1584 cut-off events. [2023-08-24 02:01:58,818 INFO L125 PetriNetUnfolderBase]: For 41723/41723 co-relation queries the response was YES. [2023-08-24 02:01:58,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 1584 events. 925/1584 cut-off events. For 41723/41723 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8057 event pairs, 158 based on Foata normal form. 2/1584 useless extension candidates. Maximal degree in co-relation 13036. Up to 1465 conditions per place. [2023-08-24 02:01:58,836 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 266 selfloop transitions, 55 changer transitions 4/325 dead transitions. [2023-08-24 02:01:58,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 325 transitions, 4997 flow [2023-08-24 02:01:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 02:01:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 02:01:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1034 transitions. [2023-08-24 02:01:58,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2684319833852544 [2023-08-24 02:01:58,843 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1034 transitions. [2023-08-24 02:01:58,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1034 transitions. [2023-08-24 02:01:58,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:01:58,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1034 transitions. [2023-08-24 02:01:58,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 57.44444444444444) internal successors, (1034), 18 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:58,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 214.0) internal successors, (4066), 19 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:58,849 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 214.0) internal successors, (4066), 19 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:58,849 INFO L175 Difference]: Start difference. First operand has 240 places, 279 transitions, 3482 flow. Second operand 18 states and 1034 transitions. [2023-08-24 02:01:58,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 325 transitions, 4997 flow [2023-08-24 02:01:58,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 325 transitions, 4620 flow, removed 158 selfloop flow, removed 16 redundant places. [2023-08-24 02:01:58,989 INFO L231 Difference]: Finished difference. Result has 246 places, 300 transitions, 3961 flow [2023-08-24 02:01:58,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3961, PETRI_PLACES=246, PETRI_TRANSITIONS=300} [2023-08-24 02:01:58,992 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-08-24 02:01:58,992 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 300 transitions, 3961 flow [2023-08-24 02:01:58,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:01:58,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:01:58,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:01:59,001 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 02:01:59,198 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,SelfDestructingSolverStorable28 [2023-08-24 02:01:59,198 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 02:01:59,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:01:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash 340849289, now seen corresponding path program 25 times [2023-08-24 02:01:59,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:01:59,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800466152] [2023-08-24 02:01:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:01:59,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:01:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:01:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:01:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800466152] [2023-08-24 02:01:59,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800466152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:01:59,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873746265] [2023-08-24 02:01:59,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:01:59,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:01:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:01:59,721 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 02:01:59,724 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 02:01:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:01:59,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:01:59,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:00,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:00,132 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:00,132 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 45 [2023-08-24 02:02:00,180 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:02:00,181 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 43 treesize of output 18 [2023-08-24 02:02:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:00,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873746265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:00,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:00,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-24 02:02:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511783456] [2023-08-24 02:02:00,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:00,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:02:00,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:02:00,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:02:00,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:02:00,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 300 transitions, 3961 flow. Second operand has 25 states, 25 states have (on average 61.88) internal successors, (1547), 25 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:00,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:00,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:02:00,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:01,047 INFO L124 PetriNetUnfolderBase]: 984/1687 cut-off events. [2023-08-24 02:02:01,048 INFO L125 PetriNetUnfolderBase]: For 50315/50315 co-relation queries the response was YES. [2023-08-24 02:02:01,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14609 conditions, 1687 events. 984/1687 cut-off events. For 50315/50315 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8730 event pairs, 171 based on Foata normal form. 2/1687 useless extension candidates. Maximal degree in co-relation 14484. Up to 1548 conditions per place. [2023-08-24 02:02:01,065 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 290 selfloop transitions, 57 changer transitions 2/349 dead transitions. [2023-08-24 02:02:01,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 349 transitions, 5425 flow [2023-08-24 02:02:01,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 02:02:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 02:02:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1484 transitions. [2023-08-24 02:02:01,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30150345388053634 [2023-08-24 02:02:01,071 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1484 transitions. [2023-08-24 02:02:01,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1484 transitions. [2023-08-24 02:02:01,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:01,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1484 transitions. [2023-08-24 02:02:01,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.52173913043478) internal successors, (1484), 23 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:01,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 214.0) internal successors, (5136), 24 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:01,076 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 214.0) internal successors, (5136), 24 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:01,076 INFO L175 Difference]: Start difference. First operand has 246 places, 300 transitions, 3961 flow. Second operand 23 states and 1484 transitions. [2023-08-24 02:02:01,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 349 transitions, 5425 flow [2023-08-24 02:02:01,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 349 transitions, 4836 flow, removed 277 selfloop flow, removed 9 redundant places. [2023-08-24 02:02:01,269 INFO L231 Difference]: Finished difference. Result has 265 places, 313 transitions, 4008 flow [2023-08-24 02:02:01,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4008, PETRI_PLACES=265, PETRI_TRANSITIONS=313} [2023-08-24 02:02:01,269 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-08-24 02:02:01,269 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 313 transitions, 4008 flow [2023-08-24 02:02:01,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.88) internal successors, (1547), 25 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:01,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:01,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:01,277 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 02:02:01,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:01,470 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 02:02:01,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1359716011, now seen corresponding path program 26 times [2023-08-24 02:02:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777475239] [2023-08-24 02:02:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777475239] [2023-08-24 02:02:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777475239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:01,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210777366] [2023-08-24 02:02:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:02:01,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:01,980 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 02:02:01,981 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 02:02:02,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:02:02,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:02,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:02:02,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:02,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:02,366 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:02,367 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 45 [2023-08-24 02:02:02,416 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 02:02:02,417 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 43 treesize of output 18 [2023-08-24 02:02:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210777366] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:02,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:02,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-24 02:02:02,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785887292] [2023-08-24 02:02:02,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:02,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:02:02,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:02:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:02:02,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:02:02,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 313 transitions, 4008 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:02,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:02,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:02:02,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:03,283 INFO L124 PetriNetUnfolderBase]: 1046/1793 cut-off events. [2023-08-24 02:02:03,283 INFO L125 PetriNetUnfolderBase]: For 63302/63302 co-relation queries the response was YES. [2023-08-24 02:02:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16034 conditions, 1793 events. 1046/1793 cut-off events. For 63302/63302 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9430 event pairs, 179 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 15902. Up to 1634 conditions per place. [2023-08-24 02:02:03,300 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 316 selfloop transitions, 50 changer transitions 4/370 dead transitions. [2023-08-24 02:02:03,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 370 transitions, 5583 flow [2023-08-24 02:02:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:02:03,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:02:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1366 transitions. [2023-08-24 02:02:03,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30396083667111706 [2023-08-24 02:02:03,302 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1366 transitions. [2023-08-24 02:02:03,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1366 transitions. [2023-08-24 02:02:03,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:03,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1366 transitions. [2023-08-24 02:02:03,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.04761904761905) internal successors, (1366), 21 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:03,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:03,307 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:03,308 INFO L175 Difference]: Start difference. First operand has 265 places, 313 transitions, 4008 flow. Second operand 21 states and 1366 transitions. [2023-08-24 02:02:03,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 370 transitions, 5583 flow [2023-08-24 02:02:03,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 370 transitions, 5163 flow, removed 181 selfloop flow, removed 15 redundant places. [2023-08-24 02:02:03,486 INFO L231 Difference]: Finished difference. Result has 273 places, 324 transitions, 4172 flow [2023-08-24 02:02:03,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4172, PETRI_PLACES=273, PETRI_TRANSITIONS=324} [2023-08-24 02:02:03,486 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-08-24 02:02:03,486 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 324 transitions, 4172 flow [2023-08-24 02:02:03,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:03,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:03,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:03,492 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 02:02:03,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:03,688 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 02:02:03,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1613279369, now seen corresponding path program 27 times [2023-08-24 02:02:03,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:03,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059882265] [2023-08-24 02:02:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:03,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:04,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:04,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059882265] [2023-08-24 02:02:04,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059882265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:04,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698623274] [2023-08-24 02:02:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:02:04,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:04,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:04,050 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 02:02:04,052 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 02:02:04,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:02:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:04,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 92 conjunts are in the unsatisfiable core [2023-08-24 02:02:04,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:04,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:02:04,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:04,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:04,517 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:04,517 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 15 treesize of output 14 [2023-08-24 02:02:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:04,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:05,011 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_999 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_999) c_~A~0.base))) (< (select .cse0 (+ c_~A~0.offset (* 4 v_subst_2))) (+ c_~counter~0 (select .cse0 .cse1) 1))) (<= c_~N~0 v_subst_2))) (forall ((v_ArrVal_999 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_999) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse2 .cse1)) (select .cse2 (+ c_~A~0.offset (* 4 v_subst_1))))) (< (+ v_subst_1 1) c_~N~0))))) is different from false [2023-08-24 02:02:05,120 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:05,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-08-24 02:02:05,130 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:05,131 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 94 treesize of output 88 [2023-08-24 02:02:05,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:05,138 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 80 treesize of output 68 [2023-08-24 02:02:05,146 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:05,146 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 34 treesize of output 33 [2023-08-24 02:02:05,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:05,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-24 02:02:05,217 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:02:05,217 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 98 treesize of output 88 [2023-08-24 02:02:05,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:05,225 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 46 treesize of output 35 [2023-08-24 02:02:05,234 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:02:05,234 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 72 treesize of output 56 [2023-08-24 02:02:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:05,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698623274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:05,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:05,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-08-24 02:02:05,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349286429] [2023-08-24 02:02:05,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:05,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:02:05,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:05,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:02:05,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=786, Unknown=1, NotChecked=58, Total=992 [2023-08-24 02:02:05,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:05,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 324 transitions, 4172 flow. Second operand has 32 states, 32 states have (on average 54.59375) internal successors, (1747), 32 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:05,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:05,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:05,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:06,606 INFO L124 PetriNetUnfolderBase]: 1183/2033 cut-off events. [2023-08-24 02:02:06,606 INFO L125 PetriNetUnfolderBase]: For 72763/72763 co-relation queries the response was YES. [2023-08-24 02:02:06,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18264 conditions, 2033 events. 1183/2033 cut-off events. For 72763/72763 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10990 event pairs, 199 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 17989. Up to 1813 conditions per place. [2023-08-24 02:02:06,630 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 333 selfloop transitions, 94 changer transitions 5/432 dead transitions. [2023-08-24 02:02:06,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 432 transitions, 6663 flow [2023-08-24 02:02:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 02:02:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 02:02:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1440 transitions. [2023-08-24 02:02:06,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2691588785046729 [2023-08-24 02:02:06,634 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1440 transitions. [2023-08-24 02:02:06,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1440 transitions. [2023-08-24 02:02:06,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:06,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1440 transitions. [2023-08-24 02:02:06,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.6) internal successors, (1440), 25 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:06,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:06,640 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:06,640 INFO L175 Difference]: Start difference. First operand has 273 places, 324 transitions, 4172 flow. Second operand 25 states and 1440 transitions. [2023-08-24 02:02:06,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 432 transitions, 6663 flow [2023-08-24 02:02:06,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 432 transitions, 6136 flow, removed 210 selfloop flow, removed 13 redundant places. [2023-08-24 02:02:06,823 INFO L231 Difference]: Finished difference. Result has 292 places, 384 transitions, 5235 flow [2023-08-24 02:02:06,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5235, PETRI_PLACES=292, PETRI_TRANSITIONS=384} [2023-08-24 02:02:06,823 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-08-24 02:02:06,823 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 384 transitions, 5235 flow [2023-08-24 02:02:06,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 54.59375) internal successors, (1747), 32 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:06,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:06,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:06,829 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 02:02:07,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:07,024 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 02:02:07,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1451669871, now seen corresponding path program 28 times [2023-08-24 02:02:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:07,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093256403] [2023-08-24 02:02:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:07,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:07,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:07,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093256403] [2023-08-24 02:02:07,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093256403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:07,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49770919] [2023-08-24 02:02:07,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:02:07,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:07,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:07,131 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 02:02:07,132 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 02:02:07,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:02:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:07,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:02:07,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:07,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:02:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49770919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:07,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 02:02:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949977458] [2023-08-24 02:02:07,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:02:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:02:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:02:07,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:02:07,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 384 transitions, 5235 flow. Second operand has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:07,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:07,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:02:07,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:08,041 INFO L124 PetriNetUnfolderBase]: 1614/2894 cut-off events. [2023-08-24 02:02:08,041 INFO L125 PetriNetUnfolderBase]: For 110859/110883 co-relation queries the response was YES. [2023-08-24 02:02:08,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25087 conditions, 2894 events. 1614/2894 cut-off events. For 110859/110883 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17974 event pairs, 534 based on Foata normal form. 146/3020 useless extension candidates. Maximal degree in co-relation 24723. Up to 1806 conditions per place. [2023-08-24 02:02:08,076 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 452 selfloop transitions, 80 changer transitions 27/571 dead transitions. [2023-08-24 02:02:08,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 571 transitions, 8575 flow [2023-08-24 02:02:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 02:02:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 02:02:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 734 transitions. [2023-08-24 02:02:08,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811007268951194 [2023-08-24 02:02:08,078 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 734 transitions. [2023-08-24 02:02:08,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 734 transitions. [2023-08-24 02:02:08,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:08,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 734 transitions. [2023-08-24 02:02:08,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.55555555555556) internal successors, (734), 9 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:08,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:08,080 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:08,080 INFO L175 Difference]: Start difference. First operand has 292 places, 384 transitions, 5235 flow. Second operand 9 states and 734 transitions. [2023-08-24 02:02:08,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 571 transitions, 8575 flow [2023-08-24 02:02:08,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 571 transitions, 8197 flow, removed 178 selfloop flow, removed 5 redundant places. [2023-08-24 02:02:08,331 INFO L231 Difference]: Finished difference. Result has 299 places, 430 transitions, 5855 flow [2023-08-24 02:02:08,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5855, PETRI_PLACES=299, PETRI_TRANSITIONS=430} [2023-08-24 02:02:08,331 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2023-08-24 02:02:08,332 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 430 transitions, 5855 flow [2023-08-24 02:02:08,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:08,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:08,332 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:08,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 02:02:08,532 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,SelfDestructingSolverStorable32 [2023-08-24 02:02:08,533 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 02:02:08,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash 167617211, now seen corresponding path program 29 times [2023-08-24 02:02:08,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:08,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568608008] [2023-08-24 02:02:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:08,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:02:08,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568608008] [2023-08-24 02:02:08,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568608008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112040294] [2023-08-24 02:02:08,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:02:08,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:08,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:08,629 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 02:02:08,631 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 02:02:08,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:02:08,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:08,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:02:08,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:02:08,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:02:08,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112040294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:08,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:08,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 02:02:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643170693] [2023-08-24 02:02:08,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:08,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:02:08,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:02:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:02:08,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:02:08,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 430 transitions, 5855 flow. Second operand has 19 states, 19 states have (on average 77.73684210526316) internal successors, (1477), 19 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:08,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:08,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:02:08,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:09,565 INFO L124 PetriNetUnfolderBase]: 1363/2560 cut-off events. [2023-08-24 02:02:09,565 INFO L125 PetriNetUnfolderBase]: For 94012/94038 co-relation queries the response was YES. [2023-08-24 02:02:09,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22289 conditions, 2560 events. 1363/2560 cut-off events. For 94012/94038 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16259 event pairs, 515 based on Foata normal form. 150/2710 useless extension candidates. Maximal degree in co-relation 22134. Up to 1815 conditions per place. [2023-08-24 02:02:09,593 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 322 selfloop transitions, 4 changer transitions 158/489 dead transitions. [2023-08-24 02:02:09,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 489 transitions, 7290 flow [2023-08-24 02:02:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 02:02:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 02:02:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 733 transitions. [2023-08-24 02:02:09,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805815160955348 [2023-08-24 02:02:09,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 733 transitions. [2023-08-24 02:02:09,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 733 transitions. [2023-08-24 02:02:09,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:09,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 733 transitions. [2023-08-24 02:02:09,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.44444444444444) internal successors, (733), 9 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:09,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:09,597 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:09,597 INFO L175 Difference]: Start difference. First operand has 299 places, 430 transitions, 5855 flow. Second operand 9 states and 733 transitions. [2023-08-24 02:02:09,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 489 transitions, 7290 flow [2023-08-24 02:02:09,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 489 transitions, 7207 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-08-24 02:02:09,883 INFO L231 Difference]: Finished difference. Result has 305 places, 331 transitions, 4302 flow [2023-08-24 02:02:09,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4302, PETRI_PLACES=305, PETRI_TRANSITIONS=331} [2023-08-24 02:02:09,884 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-08-24 02:02:09,884 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 331 transitions, 4302 flow [2023-08-24 02:02:09,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.73684210526316) internal successors, (1477), 19 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:09,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:09,884 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:09,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-24 02:02:10,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:10,085 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 02:02:10,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2012572228, now seen corresponding path program 30 times [2023-08-24 02:02:10,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:10,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095172075] [2023-08-24 02:02:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:10,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:10,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095172075] [2023-08-24 02:02:10,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095172075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:10,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546889264] [2023-08-24 02:02:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:02:10,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:10,200 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 02:02:10,201 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 02:02:10,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:02:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:10,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:02:10,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:10,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:10,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546889264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:10,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:10,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 02:02:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397965773] [2023-08-24 02:02:10,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:02:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:02:10,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:02:10,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:02:10,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 331 transitions, 4302 flow. Second operand has 19 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:10,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:10,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:02:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:10,893 INFO L124 PetriNetUnfolderBase]: 869/1511 cut-off events. [2023-08-24 02:02:10,894 INFO L125 PetriNetUnfolderBase]: For 71519/71521 co-relation queries the response was YES. [2023-08-24 02:02:10,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 1511 events. 869/1511 cut-off events. For 71519/71521 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7755 event pairs, 180 based on Foata normal form. 188/1699 useless extension candidates. Maximal degree in co-relation 12928. Up to 854 conditions per place. [2023-08-24 02:02:10,912 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 197 selfloop transitions, 111 changer transitions 0/313 dead transitions. [2023-08-24 02:02:10,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 313 transitions, 4901 flow [2023-08-24 02:02:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:02:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:02:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2023-08-24 02:02:10,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728971962616822 [2023-08-24 02:02:10,914 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2023-08-24 02:02:10,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2023-08-24 02:02:10,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:10,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2023-08-24 02:02:10,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:10,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:10,917 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:10,917 INFO L175 Difference]: Start difference. First operand has 305 places, 331 transitions, 4302 flow. Second operand 10 states and 798 transitions. [2023-08-24 02:02:10,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 313 transitions, 4901 flow [2023-08-24 02:02:11,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 313 transitions, 4247 flow, removed 278 selfloop flow, removed 34 redundant places. [2023-08-24 02:02:11,080 INFO L231 Difference]: Finished difference. Result has 261 places, 296 transitions, 3646 flow [2023-08-24 02:02:11,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3646, PETRI_PLACES=261, PETRI_TRANSITIONS=296} [2023-08-24 02:02:11,080 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-24 02:02:11,080 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 296 transitions, 3646 flow [2023-08-24 02:02:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:11,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:11,081 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:11,086 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 02:02:11,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:11,282 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 02:02:11,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2084925748, now seen corresponding path program 31 times [2023-08-24 02:02:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:11,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592489742] [2023-08-24 02:02:11,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:11,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:11,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592489742] [2023-08-24 02:02:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592489742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343288820] [2023-08-24 02:02:11,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:02:11,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:11,386 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 02:02:11,407 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 02:02:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:11,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:02:11,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:11,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343288820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:11,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:11,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 02:02:11,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542268357] [2023-08-24 02:02:11,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:11,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:02:11,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:02:11,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:02:11,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 02:02:11,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 296 transitions, 3646 flow. Second operand has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:11,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:11,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 02:02:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:11,934 INFO L124 PetriNetUnfolderBase]: 682/1196 cut-off events. [2023-08-24 02:02:11,934 INFO L125 PetriNetUnfolderBase]: For 46788/46794 co-relation queries the response was YES. [2023-08-24 02:02:11,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10896 conditions, 1196 events. 682/1196 cut-off events. For 46788/46794 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5755 event pairs, 206 based on Foata normal form. 100/1290 useless extension candidates. Maximal degree in co-relation 10790. Up to 777 conditions per place. [2023-08-24 02:02:11,947 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 168 selfloop transitions, 95 changer transitions 0/272 dead transitions. [2023-08-24 02:02:11,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 272 transitions, 4259 flow [2023-08-24 02:02:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:02:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:02:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2023-08-24 02:02:11,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728971962616822 [2023-08-24 02:02:11,950 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2023-08-24 02:02:11,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2023-08-24 02:02:11,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:11,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2023-08-24 02:02:11,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:11,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:11,952 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:11,952 INFO L175 Difference]: Start difference. First operand has 261 places, 296 transitions, 3646 flow. Second operand 10 states and 798 transitions. [2023-08-24 02:02:11,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 272 transitions, 4259 flow [2023-08-24 02:02:12,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 272 transitions, 3673 flow, removed 186 selfloop flow, removed 31 redundant places. [2023-08-24 02:02:12,037 INFO L231 Difference]: Finished difference. Result has 232 places, 259 transitions, 3158 flow [2023-08-24 02:02:12,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3158, PETRI_PLACES=232, PETRI_TRANSITIONS=259} [2023-08-24 02:02:12,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-08-24 02:02:12,038 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 259 transitions, 3158 flow [2023-08-24 02:02:12,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:12,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:12,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:12,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-24 02:02:12,239 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,SelfDestructingSolverStorable35 [2023-08-24 02:02:12,239 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 02:02:12,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:12,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1161491682, now seen corresponding path program 32 times [2023-08-24 02:02:12,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:12,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792431590] [2023-08-24 02:02:12,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:12,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792431590] [2023-08-24 02:02:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792431590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071639362] [2023-08-24 02:02:13,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:02:13,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:13,443 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 02:02:13,445 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 02:02:13,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:02:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:13,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-08-24 02:02:13,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:13,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:13,745 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 25 treesize of output 23 [2023-08-24 02:02:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:13,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:14,027 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1182 (Array Int Int))) (<= c_~counter~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_1182 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~counter~0 1))))) is different from false [2023-08-24 02:02:14,034 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1182 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2))) (+ .cse3 c_~counter~0 1))) (forall ((v_ArrVal_1182 (Array Int Int))) (<= (+ .cse3 c_~counter~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2023-08-24 02:02:14,045 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| c_~A~0.base)) (.cse7 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 8)) (.cse4 (+ c_~A~0.offset 4)) (.cse0 (select .cse6 (+ c_~A~0.offset .cse7))) (.cse1 (select .cse6 (+ c_~A~0.offset .cse7 4)))) (and (forall ((v_ArrVal_1182 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) (select .cse2 .cse3) (select .cse2 .cse4))))) (forall ((v_ArrVal_1182 (Array Int Int))) (< (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse3) (select .cse5 .cse4))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-08-24 02:02:14,092 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:14,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 120 [2023-08-24 02:02:14,101 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:14,101 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 25 treesize of output 15 [2023-08-24 02:02:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:02:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2023-08-24 02:02:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071639362] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:14,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:14,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 02:02:14,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601236508] [2023-08-24 02:02:14,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:14,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 02:02:14,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 02:02:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1014, Unknown=3, NotChecked=198, Total=1332 [2023-08-24 02:02:14,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:14,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 259 transitions, 3158 flow. Second operand has 37 states, 37 states have (on average 54.5945945945946) internal successors, (2020), 37 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:14,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:14,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:14,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:15,967 INFO L124 PetriNetUnfolderBase]: 748/1308 cut-off events. [2023-08-24 02:02:15,967 INFO L125 PetriNetUnfolderBase]: For 26769/26769 co-relation queries the response was YES. [2023-08-24 02:02:15,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10475 conditions, 1308 events. 748/1308 cut-off events. For 26769/26769 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6305 event pairs, 123 based on Foata normal form. 1/1309 useless extension candidates. Maximal degree in co-relation 10386. Up to 1025 conditions per place. [2023-08-24 02:02:15,981 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 200 selfloop transitions, 112 changer transitions 1/313 dead transitions. [2023-08-24 02:02:15,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 313 transitions, 4494 flow [2023-08-24 02:02:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 02:02:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 02:02:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1435 transitions. [2023-08-24 02:02:15,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26822429906542056 [2023-08-24 02:02:15,991 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1435 transitions. [2023-08-24 02:02:15,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1435 transitions. [2023-08-24 02:02:15,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:15,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1435 transitions. [2023-08-24 02:02:15,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.4) internal successors, (1435), 25 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:15,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:15,997 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:15,997 INFO L175 Difference]: Start difference. First operand has 232 places, 259 transitions, 3158 flow. Second operand 25 states and 1435 transitions. [2023-08-24 02:02:15,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 313 transitions, 4494 flow [2023-08-24 02:02:16,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 313 transitions, 4245 flow, removed 49 selfloop flow, removed 14 redundant places. [2023-08-24 02:02:16,073 INFO L231 Difference]: Finished difference. Result has 248 places, 272 transitions, 3680 flow [2023-08-24 02:02:16,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3680, PETRI_PLACES=248, PETRI_TRANSITIONS=272} [2023-08-24 02:02:16,074 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-08-24 02:02:16,074 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 272 transitions, 3680 flow [2023-08-24 02:02:16,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.5945945945946) internal successors, (2020), 37 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:16,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:16,074 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:16,083 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 02:02:16,280 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,SelfDestructingSolverStorable36 [2023-08-24 02:02:16,280 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 02:02:16,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:16,281 INFO L85 PathProgramCache]: Analyzing trace with hash -639377598, now seen corresponding path program 33 times [2023-08-24 02:02:16,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:16,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536985389] [2023-08-24 02:02:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536985389] [2023-08-24 02:02:17,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536985389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158476703] [2023-08-24 02:02:17,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:02:17,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:17,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:17,281 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 02:02:17,283 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 02:02:17,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:02:17,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:17,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-24 02:02:17,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:17,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:02:17,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:17,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:17,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:18,000 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:18,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-08-24 02:02:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:18,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:21,573 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1224 (Array Int Int)) (v_subst_6 Int)) (or (forall ((v_subst_4 Int)) (or (<= c_~N~0 (+ v_subst_4 1)) (< (+ 2 v_subst_4) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1224) c_~A~0.base))) (< (let ((.cse1 (* 4 v_subst_4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_6))) 1))))) (< (+ v_subst_6 1) c_~N~0) (<= c_~N~0 v_subst_6))) (forall ((v_ArrVal_1224 (Array Int Int)) (v_subst_5 Int)) (or (< (+ v_subst_5 1) c_~N~0) (forall ((v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1224) c_~A~0.base))) (<= (+ (select .cse3 (+ c_~A~0.offset (* 4 v_subst_5))) c_~counter~0 (select .cse3 .cse2)) (let ((.cse4 (* 4 v_subst_3))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)))))))) (<= c_~N~0 v_subst_5))))) is different from false [2023-08-24 02:02:27,778 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:02:27,810 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:27,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-08-24 02:02:27,842 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:02:27,842 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 166 treesize of output 155 [2023-08-24 02:02:27,875 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:02:27,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 106 [2023-08-24 02:02:27,910 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:02:27,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 50 [2023-08-24 02:02:28,003 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:28,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-08-24 02:02:28,025 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:02:28,026 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 334 treesize of output 280 [2023-08-24 02:02:28,036 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:02:28,037 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:02:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:28,039 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-08-24 02:02:28,062 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:02:28,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-08-24 02:02:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158476703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:28,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:28,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-08-24 02:02:28,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125590612] [2023-08-24 02:02:28,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 02:02:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 02:02:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1892, Unknown=1, NotChecked=88, Total=2162 [2023-08-24 02:02:28,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:28,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 272 transitions, 3680 flow. Second operand has 47 states, 47 states have (on average 54.340425531914896) internal successors, (2554), 47 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:28,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:28,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:28,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:32,903 INFO L124 PetriNetUnfolderBase]: 949/1666 cut-off events. [2023-08-24 02:02:32,903 INFO L125 PetriNetUnfolderBase]: For 29658/29658 co-relation queries the response was YES. [2023-08-24 02:02:32,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13596 conditions, 1666 events. 949/1666 cut-off events. For 29658/29658 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8551 event pairs, 141 based on Foata normal form. 2/1668 useless extension candidates. Maximal degree in co-relation 13507. Up to 1257 conditions per place. [2023-08-24 02:02:32,920 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 266 selfloop transitions, 191 changer transitions 7/464 dead transitions. [2023-08-24 02:02:32,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 464 transitions, 7047 flow [2023-08-24 02:02:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-24 02:02:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-24 02:02:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3073 transitions. [2023-08-24 02:02:32,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26592246452059537 [2023-08-24 02:02:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3073 transitions. [2023-08-24 02:02:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3073 transitions. [2023-08-24 02:02:32,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:32,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3073 transitions. [2023-08-24 02:02:32,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 56.907407407407405) internal successors, (3073), 54 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:32,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 214.0) internal successors, (11770), 55 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:32,940 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 214.0) internal successors, (11770), 55 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:32,940 INFO L175 Difference]: Start difference. First operand has 248 places, 272 transitions, 3680 flow. Second operand 54 states and 3073 transitions. [2023-08-24 02:02:32,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 464 transitions, 7047 flow [2023-08-24 02:02:33,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 464 transitions, 6387 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-08-24 02:02:33,037 INFO L231 Difference]: Finished difference. Result has 298 places, 381 transitions, 5725 flow [2023-08-24 02:02:33,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5725, PETRI_PLACES=298, PETRI_TRANSITIONS=381} [2023-08-24 02:02:33,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-08-24 02:02:33,038 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 381 transitions, 5725 flow [2023-08-24 02:02:33,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.340425531914896) internal successors, (2554), 47 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:33,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:33,039 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:33,045 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 02:02:33,245 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,SelfDestructingSolverStorable37 [2023-08-24 02:02:33,245 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 02:02:33,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2072187220, now seen corresponding path program 34 times [2023-08-24 02:02:33,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:33,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993058599] [2023-08-24 02:02:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:33,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:34,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993058599] [2023-08-24 02:02:34,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993058599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910308155] [2023-08-24 02:02:34,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:02:34,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:34,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:34,286 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 02:02:34,287 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 02:02:34,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:02:34,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:34,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:02:34,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:34,756 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:34,756 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 15 treesize of output 14 [2023-08-24 02:02:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:34,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:35,318 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:35,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 109 [2023-08-24 02:02:35,787 INFO L322 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-24 02:02:35,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-08-24 02:02:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910308155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:36,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:36,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 02:02:36,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738175221] [2023-08-24 02:02:36,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:36,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:02:36,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:36,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:02:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 02:02:36,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:36,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 381 transitions, 5725 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:36,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:36,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:36,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:38,338 INFO L124 PetriNetUnfolderBase]: 1028/1800 cut-off events. [2023-08-24 02:02:38,338 INFO L125 PetriNetUnfolderBase]: For 40651/40651 co-relation queries the response was YES. [2023-08-24 02:02:38,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 1800 events. 1028/1800 cut-off events. For 40651/40651 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9429 event pairs, 166 based on Foata normal form. 2/1802 useless extension candidates. Maximal degree in co-relation 15671. Up to 1318 conditions per place. [2023-08-24 02:02:38,357 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 276 selfloop transitions, 196 changer transitions 7/479 dead transitions. [2023-08-24 02:02:38,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 479 transitions, 8059 flow [2023-08-24 02:02:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 02:02:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 02:02:38,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2570 transitions. [2023-08-24 02:02:38,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26687435098650053 [2023-08-24 02:02:38,359 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2570 transitions. [2023-08-24 02:02:38,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2570 transitions. [2023-08-24 02:02:38,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:38,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2570 transitions. [2023-08-24 02:02:38,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.111111111111114) internal successors, (2570), 45 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:38,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:38,367 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:38,368 INFO L175 Difference]: Start difference. First operand has 298 places, 381 transitions, 5725 flow. Second operand 45 states and 2570 transitions. [2023-08-24 02:02:38,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 479 transitions, 8059 flow [2023-08-24 02:02:38,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 479 transitions, 7400 flow, removed 276 selfloop flow, removed 16 redundant places. [2023-08-24 02:02:38,480 INFO L231 Difference]: Finished difference. Result has 330 places, 412 transitions, 6686 flow [2023-08-24 02:02:38,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=6686, PETRI_PLACES=330, PETRI_TRANSITIONS=412} [2023-08-24 02:02:38,481 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2023-08-24 02:02:38,481 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 412 transitions, 6686 flow [2023-08-24 02:02:38,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:38,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:38,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:38,488 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 02:02:38,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 02:02:38,682 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 02:02:38,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash -756029916, now seen corresponding path program 35 times [2023-08-24 02:02:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817490928] [2023-08-24 02:02:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817490928] [2023-08-24 02:02:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817490928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799353693] [2023-08-24 02:02:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:02:39,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:39,725 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 02:02:39,727 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 02:02:39,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:02:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:39,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:02:39,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:02:40,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:40,348 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:40,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 02:02:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:40,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799353693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:40,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:40,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 02:02:40,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708046623] [2023-08-24 02:02:40,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:40,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:02:40,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:40,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:02:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 02:02:40,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:40,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 412 transitions, 6686 flow. Second operand has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:40,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:40,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:40,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:42,091 INFO L124 PetriNetUnfolderBase]: 1093/1904 cut-off events. [2023-08-24 02:02:42,092 INFO L125 PetriNetUnfolderBase]: For 46262/46262 co-relation queries the response was YES. [2023-08-24 02:02:42,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17565 conditions, 1904 events. 1093/1904 cut-off events. For 46262/46262 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10033 event pairs, 145 based on Foata normal form. 2/1906 useless extension candidates. Maximal degree in co-relation 17459. Up to 1451 conditions per place. [2023-08-24 02:02:42,112 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 277 selfloop transitions, 208 changer transitions 2/487 dead transitions. [2023-08-24 02:02:42,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 487 transitions, 8877 flow [2023-08-24 02:02:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 02:02:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 02:02:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1888 transitions. [2023-08-24 02:02:42,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26734636080430474 [2023-08-24 02:02:42,114 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1888 transitions. [2023-08-24 02:02:42,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1888 transitions. [2023-08-24 02:02:42,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:42,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1888 transitions. [2023-08-24 02:02:42,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.21212121212121) internal successors, (1888), 33 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:42,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 214.0) internal successors, (7276), 34 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:42,119 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 214.0) internal successors, (7276), 34 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:42,119 INFO L175 Difference]: Start difference. First operand has 330 places, 412 transitions, 6686 flow. Second operand 33 states and 1888 transitions. [2023-08-24 02:02:42,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 487 transitions, 8877 flow [2023-08-24 02:02:42,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 487 transitions, 7846 flow, removed 420 selfloop flow, removed 31 redundant places. [2023-08-24 02:02:42,275 INFO L231 Difference]: Finished difference. Result has 338 places, 438 transitions, 7196 flow [2023-08-24 02:02:42,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7196, PETRI_PLACES=338, PETRI_TRANSITIONS=438} [2023-08-24 02:02:42,276 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 317 predicate places. [2023-08-24 02:02:42,276 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 438 transitions, 7196 flow [2023-08-24 02:02:42,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:42,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:42,277 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:42,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 02:02:42,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 02:02:42,483 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 02:02:42,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash -441116318, now seen corresponding path program 36 times [2023-08-24 02:02:42,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:42,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509101084] [2023-08-24 02:02:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:42,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:43,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509101084] [2023-08-24 02:02:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509101084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214442420] [2023-08-24 02:02:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:02:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:43,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:43,219 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 02:02:43,221 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 02:02:43,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:02:43,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:43,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 02:02:43,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:43,452 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:02:43,492 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:43,525 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:43,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:43,768 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 15 treesize of output 14 [2023-08-24 02:02:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:43,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:46,524 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1342 (Array Int Int)) (v_subst_10 Int)) (or (< (+ v_subst_10 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1342) c_~A~0.base))) (< (select .cse0 .cse1) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_10 4))) c_~counter~0 1))) (<= c_~N~0 v_subst_10))) (forall ((v_subst_9 Int) (v_ArrVal_1342 (Array Int Int))) (or (< (+ v_subst_9 1) c_~N~0) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1342) c_~A~0.base))) (<= (+ (select .cse2 (+ c_~A~0.offset (* 4 v_subst_9))) c_~counter~0) (select .cse2 .cse1))) (<= c_~N~0 v_subst_9))))) is different from false [2023-08-24 02:02:46,649 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:46,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-24 02:02:46,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:46,656 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 206 treesize of output 186 [2023-08-24 02:02:46,666 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:46,667 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 37 treesize of output 36 [2023-08-24 02:02:46,675 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:46,675 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 46 treesize of output 35 [2023-08-24 02:02:46,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:46,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-08-24 02:02:46,739 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:02:46,739 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 198 treesize of output 174 [2023-08-24 02:02:46,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:46,748 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 44 treesize of output 20 [2023-08-24 02:02:46,756 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:02:46,756 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 33 treesize of output 28 [2023-08-24 02:02:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:46,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214442420] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:46,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:46,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2023-08-24 02:02:46,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355535802] [2023-08-24 02:02:46,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:46,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:02:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:02:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1544, Unknown=1, NotChecked=80, Total=1806 [2023-08-24 02:02:46,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:46,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 438 transitions, 7196 flow. Second operand has 43 states, 43 states have (on average 54.348837209302324) internal successors, (2337), 43 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 02:02:46,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:46,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:49,859 INFO L124 PetriNetUnfolderBase]: 1320/2299 cut-off events. [2023-08-24 02:02:49,859 INFO L125 PetriNetUnfolderBase]: For 56704/56704 co-relation queries the response was YES. [2023-08-24 02:02:49,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 2299 events. 1320/2299 cut-off events. For 56704/56704 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12685 event pairs, 170 based on Foata normal form. 2/2299 useless extension candidates. Maximal degree in co-relation 21052. Up to 1710 conditions per place. [2023-08-24 02:02:49,894 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 323 selfloop transitions, 278 changer transitions 4/605 dead transitions. [2023-08-24 02:02:49,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 605 transitions, 11051 flow [2023-08-24 02:02:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 02:02:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 02:02:49,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2515 transitions. [2023-08-24 02:02:49,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2670985556499575 [2023-08-24 02:02:49,897 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2515 transitions. [2023-08-24 02:02:49,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2515 transitions. [2023-08-24 02:02:49,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:49,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2515 transitions. [2023-08-24 02:02:49,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.15909090909091) internal successors, (2515), 44 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:49,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:49,903 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:49,903 INFO L175 Difference]: Start difference. First operand has 338 places, 438 transitions, 7196 flow. Second operand 44 states and 2515 transitions. [2023-08-24 02:02:49,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 605 transitions, 11051 flow [2023-08-24 02:02:50,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 605 transitions, 10257 flow, removed 308 selfloop flow, removed 19 redundant places. [2023-08-24 02:02:50,087 INFO L231 Difference]: Finished difference. Result has 367 places, 535 transitions, 9227 flow [2023-08-24 02:02:50,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9227, PETRI_PLACES=367, PETRI_TRANSITIONS=535} [2023-08-24 02:02:50,087 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 346 predicate places. [2023-08-24 02:02:50,087 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 535 transitions, 9227 flow [2023-08-24 02:02:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.348837209302324) internal successors, (2337), 43 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 02:02:50,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:50,088 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:50,093 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 02:02:50,288 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,SelfDestructingSolverStorable40 [2023-08-24 02:02:50,289 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 02:02:50,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 437994252, now seen corresponding path program 37 times [2023-08-24 02:02:50,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:50,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613807806] [2023-08-24 02:02:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:50,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613807806] [2023-08-24 02:02:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613807806] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852369132] [2023-08-24 02:02:51,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:02:51,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:51,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:51,137 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 02:02:51,160 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 02:02:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:51,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 02:02:51,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:51,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:51,758 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:51,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 02:02:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:02:51,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852369132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:51,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:51,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-08-24 02:02:51,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918289535] [2023-08-24 02:02:51,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:51,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:02:51,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:51,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:02:51,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2023-08-24 02:02:51,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:02:51,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 535 transitions, 9227 flow. Second operand has 32 states, 32 states have (on average 61.6875) internal successors, (1974), 32 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:51,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:51,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:02:51,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:02:53,558 INFO L124 PetriNetUnfolderBase]: 1428/2485 cut-off events. [2023-08-24 02:02:53,558 INFO L125 PetriNetUnfolderBase]: For 62833/62833 co-relation queries the response was YES. [2023-08-24 02:02:53,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23721 conditions, 2485 events. 1428/2485 cut-off events. For 62833/62833 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13969 event pairs, 191 based on Foata normal form. 2/2485 useless extension candidates. Maximal degree in co-relation 23605. Up to 1968 conditions per place. [2023-08-24 02:02:53,586 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 382 selfloop transitions, 233 changer transitions 2/617 dead transitions. [2023-08-24 02:02:53,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 617 transitions, 12199 flow [2023-08-24 02:02:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 02:02:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 02:02:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1929 transitions. [2023-08-24 02:02:53,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30046728971962616 [2023-08-24 02:02:53,588 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1929 transitions. [2023-08-24 02:02:53,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1929 transitions. [2023-08-24 02:02:53,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:02:53,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1929 transitions. [2023-08-24 02:02:53,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.3) internal successors, (1929), 30 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:53,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:53,594 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:53,594 INFO L175 Difference]: Start difference. First operand has 367 places, 535 transitions, 9227 flow. Second operand 30 states and 1929 transitions. [2023-08-24 02:02:53,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 617 transitions, 12199 flow [2023-08-24 02:02:53,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 617 transitions, 11418 flow, removed 311 selfloop flow, removed 26 redundant places. [2023-08-24 02:02:53,827 INFO L231 Difference]: Finished difference. Result has 378 places, 573 transitions, 10574 flow [2023-08-24 02:02:53,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10574, PETRI_PLACES=378, PETRI_TRANSITIONS=573} [2023-08-24 02:02:53,828 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2023-08-24 02:02:53,828 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 573 transitions, 10574 flow [2023-08-24 02:02:53,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.6875) internal successors, (1974), 32 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:53,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:02:53,828 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:02:53,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 02:02:54,034 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,SelfDestructingSolverStorable41 [2023-08-24 02:02:54,034 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 02:02:54,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:02:54,035 INFO L85 PathProgramCache]: Analyzing trace with hash 123080654, now seen corresponding path program 38 times [2023-08-24 02:02:54,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:02:54,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546890937] [2023-08-24 02:02:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:02:54,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:02:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:02:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:55,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:02:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546890937] [2023-08-24 02:02:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546890937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:02:55,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562770869] [2023-08-24 02:02:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:02:55,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:02:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:02:55,089 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 02:02:55,111 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 02:02:55,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:02:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:02:55,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 02:02:55,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:02:55,329 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:02:55,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:55,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:02:55,686 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:55,687 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 15 treesize of output 14 [2023-08-24 02:02:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:55,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:02:58,524 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1422 (Array Int Int)) (v_subst_11 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1422) c_~A~0.base))) (< (select .cse0 (+ c_~A~0.offset (* v_subst_11 4))) (+ c_~counter~0 (select .cse0 .cse1) 1))) (<= c_~N~0 v_subst_11) (< (+ v_subst_11 1) c_~N~0))) (forall ((v_subst_12 Int) (v_ArrVal_1422 (Array Int Int))) (or (<= c_~N~0 v_subst_12) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1422) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse2 .cse1)) (select .cse2 (+ c_~A~0.offset (* v_subst_12 4))))) (< (+ v_subst_12 1) c_~N~0))))) is different from false [2023-08-24 02:02:58,639 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:58,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-24 02:02:58,646 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:58,646 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 98 treesize of output 92 [2023-08-24 02:02:58,653 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:58,654 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 84 treesize of output 72 [2023-08-24 02:02:58,665 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:58,665 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 36 treesize of output 35 [2023-08-24 02:02:58,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:02:58,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-08-24 02:02:58,740 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:02:58,740 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 94 treesize of output 84 [2023-08-24 02:02:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:02:58,748 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 44 treesize of output 32 [2023-08-24 02:02:58,758 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:02:58,758 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 66 treesize of output 50 [2023-08-24 02:02:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:02:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562770869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:02:58,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:02:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 02:02:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914307689] [2023-08-24 02:02:58,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:02:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 02:02:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:02:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 02:02:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1687, Unknown=1, NotChecked=84, Total=1980 [2023-08-24 02:02:58,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:02:58,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 573 transitions, 10574 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:02:58,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:02:58,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:02:58,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:13,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:03:18,031 INFO L124 PetriNetUnfolderBase]: 1492/2595 cut-off events. [2023-08-24 02:03:18,031 INFO L125 PetriNetUnfolderBase]: For 70982/70982 co-relation queries the response was YES. [2023-08-24 02:03:18,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 2595 events. 1492/2595 cut-off events. For 70982/70982 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14683 event pairs, 238 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 25652. Up to 2211 conditions per place. [2023-08-24 02:03:18,063 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 445 selfloop transitions, 220 changer transitions 6/671 dead transitions. [2023-08-24 02:03:18,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 13532 flow [2023-08-24 02:03:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 02:03:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 02:03:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2560 transitions. [2023-08-24 02:03:18,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26583592938733125 [2023-08-24 02:03:18,066 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2560 transitions. [2023-08-24 02:03:18,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2560 transitions. [2023-08-24 02:03:18,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:18,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2560 transitions. [2023-08-24 02:03:18,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 56.888888888888886) internal successors, (2560), 45 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:18,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:18,073 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:18,073 INFO L175 Difference]: Start difference. First operand has 378 places, 573 transitions, 10574 flow. Second operand 45 states and 2560 transitions. [2023-08-24 02:03:18,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 13532 flow [2023-08-24 02:03:18,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 671 transitions, 12497 flow, removed 439 selfloop flow, removed 19 redundant places. [2023-08-24 02:03:18,354 INFO L231 Difference]: Finished difference. Result has 408 places, 610 transitions, 11495 flow [2023-08-24 02:03:18,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=9715, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=11495, PETRI_PLACES=408, PETRI_TRANSITIONS=610} [2023-08-24 02:03:18,355 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2023-08-24 02:03:18,355 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 610 transitions, 11495 flow [2023-08-24 02:03:18,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:18,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:18,356 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:18,361 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 02:03:18,560 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,SelfDestructingSolverStorable42 [2023-08-24 02:03:18,561 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 02:03:18,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1503022048, now seen corresponding path program 39 times [2023-08-24 02:03:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:18,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573590834] [2023-08-24 02:03:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:18,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:19,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:19,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573590834] [2023-08-24 02:03:19,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573590834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:19,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110402930] [2023-08-24 02:03:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:03:19,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:19,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:19,674 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 02:03:19,675 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 02:03:19,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:03:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:03:19,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 106 conjunts are in the unsatisfiable core [2023-08-24 02:03:19,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:20,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:20,209 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 17 treesize of output 14 [2023-08-24 02:03:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:03:20,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:03:21,037 INFO L322 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-08-24 02:03:21,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 84 [2023-08-24 02:03:21,099 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:03:21,099 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 21 treesize of output 10 [2023-08-24 02:03:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:03:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110402930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:03:21,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:03:21,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-08-24 02:03:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817456870] [2023-08-24 02:03:21,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:03:21,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:03:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:03:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:03:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 02:03:21,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:03:21,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 610 transitions, 11495 flow. Second operand has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:21,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:03:21,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:03:21,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:23,986 INFO L124 PetriNetUnfolderBase]: 1544/2696 cut-off events. [2023-08-24 02:03:23,986 INFO L125 PetriNetUnfolderBase]: For 78448/78448 co-relation queries the response was YES. [2023-08-24 02:03:24,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27218 conditions, 2696 events. 1544/2696 cut-off events. For 78448/78448 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15538 event pairs, 328 based on Foata normal form. 2/2696 useless extension candidates. Maximal degree in co-relation 27089. Up to 2274 conditions per place. [2023-08-24 02:03:24,021 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 496 selfloop transitions, 180 changer transitions 9/685 dead transitions. [2023-08-24 02:03:24,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 685 transitions, 14106 flow [2023-08-24 02:03:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 02:03:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 02:03:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1828 transitions. [2023-08-24 02:03:24,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2669392523364486 [2023-08-24 02:03:24,023 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1828 transitions. [2023-08-24 02:03:24,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1828 transitions. [2023-08-24 02:03:24,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:24,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1828 transitions. [2023-08-24 02:03:24,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.125) internal successors, (1828), 32 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 02:03:24,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:24,030 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:24,030 INFO L175 Difference]: Start difference. First operand has 408 places, 610 transitions, 11495 flow. Second operand 32 states and 1828 transitions. [2023-08-24 02:03:24,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 685 transitions, 14106 flow [2023-08-24 02:03:24,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 685 transitions, 13433 flow, removed 258 selfloop flow, removed 29 redundant places. [2023-08-24 02:03:24,449 INFO L231 Difference]: Finished difference. Result has 416 places, 630 transitions, 12194 flow [2023-08-24 02:03:24,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12194, PETRI_PLACES=416, PETRI_TRANSITIONS=630} [2023-08-24 02:03:24,450 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-08-24 02:03:24,450 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 630 transitions, 12194 flow [2023-08-24 02:03:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:24,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:24,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:24,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-24 02:03:24,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:24,657 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 02:03:24,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:24,657 INFO L85 PathProgramCache]: Analyzing trace with hash -315800322, now seen corresponding path program 40 times [2023-08-24 02:03:24,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:24,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158781153] [2023-08-24 02:03:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:24,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:25,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158781153] [2023-08-24 02:03:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158781153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461920574] [2023-08-24 02:03:25,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:03:25,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:25,674 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 02:03:25,690 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 02:03:25,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:03:25,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:03:25,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-24 02:03:25,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:26,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:03:26,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-24 02:03:26,267 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:26,268 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 15 treesize of output 14 [2023-08-24 02:03:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:26,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:03:26,833 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1499 (Array Int Int)) (|thread1Thread1of1ForFork0_~i~0#1| Int)) (or (<= c_~N~0 |thread1Thread1of1ForFork0_~i~0#1|) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (<= (+ (select .cse0 (+ c_~A~0.offset (* |thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)))))) (forall ((v_ArrVal_1499 (Array Int Int)) (|thread1Thread1of1ForFork0_~i~0#1| Int)) (or (<= c_~N~0 |thread1Thread1of1ForFork0_~i~0#1|) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1) (select .cse3 .cse2)) (+ (select .cse3 (+ c_~A~0.offset (* |thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 1))) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0))))) is different from false [2023-08-24 02:03:26,854 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_subst_18 Int) (v_ArrVal_1499 (Array Int Int))) (or (< (+ v_subst_18 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ .cse3 c_~counter~0 (select .cse0 (+ c_~A~0.offset (* v_subst_18 4))) 1))) (<= c_~N~0 v_subst_18))) (forall ((v_ArrVal_1499 (Array Int Int)) (v_subst_17 Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (<= (+ .cse3 c_~counter~0 (select .cse4 (+ c_~A~0.offset (* v_subst_17 4)))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2)))) (<= c_~N~0 v_subst_17) (< (+ v_subst_17 1) c_~N~0))))) is different from false [2023-08-24 02:03:26,920 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:26,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 140 [2023-08-24 02:03:26,939 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:26,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 40 [2023-08-24 02:03:27,221 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:03:27,271 INFO L322 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-24 02:03:27,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-24 02:03:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 02:03:27,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461920574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:03:27,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:03:27,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 02:03:27,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376148010] [2023-08-24 02:03:27,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:03:27,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 02:03:27,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:03:27,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 02:03:27,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1659, Unknown=2, NotChecked=166, Total=1980 [2023-08-24 02:03:27,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:03:27,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 630 transitions, 12194 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:27,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:03:27,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:03:27,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:31,364 INFO L124 PetriNetUnfolderBase]: 1734/3006 cut-off events. [2023-08-24 02:03:31,364 INFO L125 PetriNetUnfolderBase]: For 101802/101802 co-relation queries the response was YES. [2023-08-24 02:03:31,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31095 conditions, 3006 events. 1734/3006 cut-off events. For 101802/101802 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17608 event pairs, 220 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 30960. Up to 2389 conditions per place. [2023-08-24 02:03:31,404 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 475 selfloop transitions, 301 changer transitions 4/780 dead transitions. [2023-08-24 02:03:31,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 780 transitions, 16180 flow [2023-08-24 02:03:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 02:03:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 02:03:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2502 transitions. [2023-08-24 02:03:31,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2657179269328802 [2023-08-24 02:03:31,414 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2502 transitions. [2023-08-24 02:03:31,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2502 transitions. [2023-08-24 02:03:31,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:31,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2502 transitions. [2023-08-24 02:03:31,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 56.86363636363637) internal successors, (2502), 44 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:31,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:31,422 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:31,423 INFO L175 Difference]: Start difference. First operand has 416 places, 630 transitions, 12194 flow. Second operand 44 states and 2502 transitions. [2023-08-24 02:03:31,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 780 transitions, 16180 flow [2023-08-24 02:03:31,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 780 transitions, 15329 flow, removed 329 selfloop flow, removed 21 redundant places. [2023-08-24 02:03:31,819 INFO L231 Difference]: Finished difference. Result has 443 places, 719 transitions, 14316 flow [2023-08-24 02:03:31,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=11347, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14316, PETRI_PLACES=443, PETRI_TRANSITIONS=719} [2023-08-24 02:03:31,820 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 422 predicate places. [2023-08-24 02:03:31,820 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 719 transitions, 14316 flow [2023-08-24 02:03:31,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:31,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:31,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:31,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-24 02:03:32,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:32,021 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 02:03:32,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1754151556, now seen corresponding path program 41 times [2023-08-24 02:03:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599161718] [2023-08-24 02:03:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:32,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599161718] [2023-08-24 02:03:32,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599161718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:32,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169503485] [2023-08-24 02:03:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:03:32,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:32,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:32,637 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 02:03:32,656 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 02:03:32,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:03:32,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:03:32,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:03:32,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:03:33,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:03:33,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:33,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 02:03:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:03:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169503485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:03:33,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:03:33,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 22 [2023-08-24 02:03:33,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438963693] [2023-08-24 02:03:33,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:03:33,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:03:33,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:03:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:03:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:03:33,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 214 [2023-08-24 02:03:33,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 719 transitions, 14316 flow. Second operand has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:33,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:03:33,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 214 [2023-08-24 02:03:33,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:34,837 INFO L124 PetriNetUnfolderBase]: 1818/3136 cut-off events. [2023-08-24 02:03:34,837 INFO L125 PetriNetUnfolderBase]: For 119190/119190 co-relation queries the response was YES. [2023-08-24 02:03:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34101 conditions, 3136 events. 1818/3136 cut-off events. For 119190/119190 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18385 event pairs, 280 based on Foata normal form. 2/3136 useless extension candidates. Maximal degree in co-relation 33961. Up to 2793 conditions per place. [2023-08-24 02:03:34,876 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 614 selfloop transitions, 180 changer transitions 5/799 dead transitions. [2023-08-24 02:03:34,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 799 transitions, 18121 flow [2023-08-24 02:03:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 02:03:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 02:03:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1789 transitions. [2023-08-24 02:03:34,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334392523364486 [2023-08-24 02:03:34,879 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1789 transitions. [2023-08-24 02:03:34,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1789 transitions. [2023-08-24 02:03:34,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:34,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1789 transitions. [2023-08-24 02:03:34,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 71.56) internal successors, (1789), 25 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:34,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:34,884 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:34,884 INFO L175 Difference]: Start difference. First operand has 443 places, 719 transitions, 14316 flow. Second operand 25 states and 1789 transitions. [2023-08-24 02:03:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 799 transitions, 18121 flow [2023-08-24 02:03:35,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 799 transitions, 17243 flow, removed 368 selfloop flow, removed 23 redundant places. [2023-08-24 02:03:35,402 INFO L231 Difference]: Finished difference. Result has 452 places, 764 transitions, 15907 flow [2023-08-24 02:03:35,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=13456, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15907, PETRI_PLACES=452, PETRI_TRANSITIONS=764} [2023-08-24 02:03:35,403 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-08-24 02:03:35,403 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 764 transitions, 15907 flow [2023-08-24 02:03:35,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:35,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:35,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:35,410 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 02:03:35,609 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,SelfDestructingSolverStorable45 [2023-08-24 02:03:35,609 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 02:03:35,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:35,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1530563286, now seen corresponding path program 42 times [2023-08-24 02:03:35,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:35,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075538571] [2023-08-24 02:03:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:35,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:36,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075538571] [2023-08-24 02:03:36,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075538571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:36,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895689852] [2023-08-24 02:03:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:03:36,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:36,644 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 02:03:36,662 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 02:03:36,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:03:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:03:36,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:03:36,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:37,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:03:37,157 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:37,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-08-24 02:03:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:37,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:03:37,672 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:37,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 02:03:38,353 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:03:38,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 02:03:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:38,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895689852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:03:38,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:03:38,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 02:03:38,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100848206] [2023-08-24 02:03:38,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:03:38,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 02:03:38,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:03:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 02:03:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 02:03:38,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:03:38,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 764 transitions, 15907 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:38,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:03:38,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:03:38,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:41,090 INFO L124 PetriNetUnfolderBase]: 1924/3332 cut-off events. [2023-08-24 02:03:41,090 INFO L125 PetriNetUnfolderBase]: For 143076/143076 co-relation queries the response was YES. [2023-08-24 02:03:41,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37360 conditions, 3332 events. 1924/3332 cut-off events. For 143076/143076 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19936 event pairs, 266 based on Foata normal form. 2/3332 useless extension candidates. Maximal degree in co-relation 37212. Up to 2789 conditions per place. [2023-08-24 02:03:41,138 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 653 selfloop transitions, 212 changer transitions 4/869 dead transitions. [2023-08-24 02:03:41,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 869 transitions, 19862 flow [2023-08-24 02:03:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 02:03:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 02:03:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1725 transitions. [2023-08-24 02:03:41,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26869158878504673 [2023-08-24 02:03:41,140 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1725 transitions. [2023-08-24 02:03:41,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1725 transitions. [2023-08-24 02:03:41,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:41,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1725 transitions. [2023-08-24 02:03:41,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.5) internal successors, (1725), 30 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:41,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:41,144 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:41,144 INFO L175 Difference]: Start difference. First operand has 452 places, 764 transitions, 15907 flow. Second operand 30 states and 1725 transitions. [2023-08-24 02:03:41,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 869 transitions, 19862 flow [2023-08-24 02:03:41,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 869 transitions, 18145 flow, removed 791 selfloop flow, removed 12 redundant places. [2023-08-24 02:03:41,990 INFO L231 Difference]: Finished difference. Result has 476 places, 809 transitions, 16350 flow [2023-08-24 02:03:41,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=14190, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16350, PETRI_PLACES=476, PETRI_TRANSITIONS=809} [2023-08-24 02:03:41,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2023-08-24 02:03:41,991 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 809 transitions, 16350 flow [2023-08-24 02:03:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:41,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:41,991 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:41,997 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 02:03:42,192 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,SelfDestructingSolverStorable46 [2023-08-24 02:03:42,192 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 02:03:42,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash -676604236, now seen corresponding path program 43 times [2023-08-24 02:03:42,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:42,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532590310] [2023-08-24 02:03:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:42,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:43,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532590310] [2023-08-24 02:03:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532590310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359733929] [2023-08-24 02:03:43,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:03:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:43,133 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 02:03:43,134 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 02:03:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:43,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-08-24 02:03:43,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:03:43,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-24 02:03:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:03:43,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:03:43,787 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1614 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1614) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 .cse2) (select .cse0 .cse3) (select .cse0 c_~A~0.offset))))) (forall ((v_ArrVal_1614 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1614) c_~A~0.base))) (< (+ (select .cse4 .cse2) (select .cse4 .cse3) (select .cse4 c_~A~0.offset)) (+ (select .cse4 .cse1) c_~counter~0 1)))))) is different from false [2023-08-24 02:03:43,799 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1614 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1614) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 .cse3) (select .cse1 .cse4) (select .cse1 c_~A~0.offset))))) (forall ((v_ArrVal_1614 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1614) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 .cse4) (select .cse5 c_~A~0.offset)) (+ .cse0 (select .cse5 .cse2) c_~counter~0 1))))))) is different from false [2023-08-24 02:03:43,845 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:43,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 127 [2023-08-24 02:03:43,860 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:43,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 44 [2023-08-24 02:03:44,027 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:03:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-24 02:03:44,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359733929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:03:44,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:03:44,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-08-24 02:03:44,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657662141] [2023-08-24 02:03:44,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:03:44,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:03:44,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:03:44,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:03:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1193, Unknown=2, NotChecked=142, Total=1482 [2023-08-24 02:03:44,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:03:44,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 809 transitions, 16350 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:44,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:03:44,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:03:44,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:46,782 INFO L124 PetriNetUnfolderBase]: 2013/3480 cut-off events. [2023-08-24 02:03:46,782 INFO L125 PetriNetUnfolderBase]: For 149653/149653 co-relation queries the response was YES. [2023-08-24 02:03:46,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 3480 events. 2013/3480 cut-off events. For 149653/149653 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21041 event pairs, 260 based on Foata normal form. 1/3473 useless extension candidates. Maximal degree in co-relation 38635. Up to 2637 conditions per place. [2023-08-24 02:03:46,833 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 503 selfloop transitions, 378 changer transitions 1/882 dead transitions. [2023-08-24 02:03:46,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 882 transitions, 19785 flow [2023-08-24 02:03:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 02:03:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 02:03:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1773 transitions. [2023-08-24 02:03:46,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26725957190232136 [2023-08-24 02:03:46,835 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1773 transitions. [2023-08-24 02:03:46,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1773 transitions. [2023-08-24 02:03:46,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:46,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1773 transitions. [2023-08-24 02:03:46,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.193548387096776) internal successors, (1773), 31 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:46,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:46,840 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:46,840 INFO L175 Difference]: Start difference. First operand has 476 places, 809 transitions, 16350 flow. Second operand 31 states and 1773 transitions. [2023-08-24 02:03:46,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 882 transitions, 19785 flow [2023-08-24 02:03:47,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 882 transitions, 19286 flow, removed 202 selfloop flow, removed 17 redundant places. [2023-08-24 02:03:47,605 INFO L231 Difference]: Finished difference. Result has 495 places, 836 transitions, 18149 flow [2023-08-24 02:03:47,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=15851, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18149, PETRI_PLACES=495, PETRI_TRANSITIONS=836} [2023-08-24 02:03:47,606 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 474 predicate places. [2023-08-24 02:03:47,606 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 836 transitions, 18149 flow [2023-08-24 02:03:47,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:47,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:47,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:47,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-08-24 02:03:47,807 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,SelfDestructingSolverStorable47 [2023-08-24 02:03:47,807 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 02:03:47,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1220180318, now seen corresponding path program 44 times [2023-08-24 02:03:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:47,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661178743] [2023-08-24 02:03:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:47,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:48,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661178743] [2023-08-24 02:03:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661178743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:48,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357883206] [2023-08-24 02:03:48,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:03:48,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:48,713 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 02:03:48,729 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 02:03:48,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:03:48,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:03:48,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-08-24 02:03:48,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:03:49,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-08-24 02:03:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:03:49,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:03:49,530 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse4 (+ c_~A~0.offset .cse6 4)) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1653 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1653) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 .cse2) (select .cse0 c_~A~0.offset)) (+ .cse3 (select .cse0 .cse4) c_~counter~0 1)))) (forall ((v_ArrVal_1653 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1653) c_~A~0.base))) (<= (+ .cse3 (select .cse5 .cse4) c_~counter~0) (+ (select .cse5 .cse1) (select .cse5 .cse2) (select .cse5 c_~A~0.offset)))))))) is different from false [2023-08-24 02:03:49,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:49,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-08-24 02:03:49,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:49,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:03:49,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:03:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-24 02:03:49,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357883206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:03:49,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:03:49,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 02:03:49,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522276044] [2023-08-24 02:03:49,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:03:49,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 02:03:49,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:03:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 02:03:49,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1114, Unknown=16, NotChecked=68, Total=1332 [2023-08-24 02:03:49,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:03:49,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 836 transitions, 18149 flow. Second operand has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:49,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:03:49,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:03:49,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:03:52,561 INFO L124 PetriNetUnfolderBase]: 2113/3635 cut-off events. [2023-08-24 02:03:52,561 INFO L125 PetriNetUnfolderBase]: For 170187/170187 co-relation queries the response was YES. [2023-08-24 02:03:52,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42973 conditions, 3635 events. 2113/3635 cut-off events. For 170187/170187 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22042 event pairs, 238 based on Foata normal form. 1/3628 useless extension candidates. Maximal degree in co-relation 42811. Up to 2765 conditions per place. [2023-08-24 02:03:52,614 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 486 selfloop transitions, 440 changer transitions 1/927 dead transitions. [2023-08-24 02:03:52,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 927 transitions, 22383 flow [2023-08-24 02:03:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 02:03:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 02:03:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1947 transitions. [2023-08-24 02:03:52,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26759208356239694 [2023-08-24 02:03:52,616 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1947 transitions. [2023-08-24 02:03:52,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1947 transitions. [2023-08-24 02:03:52,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:03:52,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1947 transitions. [2023-08-24 02:03:52,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.26470588235294) internal successors, (1947), 34 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:52,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:52,622 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:52,622 INFO L175 Difference]: Start difference. First operand has 495 places, 836 transitions, 18149 flow. Second operand 34 states and 1947 transitions. [2023-08-24 02:03:52,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 927 transitions, 22383 flow [2023-08-24 02:03:53,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 927 transitions, 20950 flow, removed 519 selfloop flow, removed 21 redundant places. [2023-08-24 02:03:53,343 INFO L231 Difference]: Finished difference. Result has 514 places, 882 transitions, 20031 flow [2023-08-24 02:03:53,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=16800, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20031, PETRI_PLACES=514, PETRI_TRANSITIONS=882} [2023-08-24 02:03:53,344 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 493 predicate places. [2023-08-24 02:03:53,344 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 882 transitions, 20031 flow [2023-08-24 02:03:53,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:03:53,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:03:53,344 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:03:53,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-08-24 02:03:53,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:53,545 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 02:03:53,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:03:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash 176352748, now seen corresponding path program 45 times [2023-08-24 02:03:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:03:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747124712] [2023-08-24 02:03:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:03:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:03:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:03:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:54,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:03:54,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747124712] [2023-08-24 02:03:54,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747124712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:03:54,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925185025] [2023-08-24 02:03:54,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:03:54,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:03:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:03:54,651 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 02:03:54,654 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 02:03:54,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:03:54,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:03:54,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-24 02:03:54,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:03:54,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:03:54,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:03:54,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:03:55,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:03:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:03:55,380 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:03:55,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-08-24 02:03:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:03:55,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:00,819 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_subst_23 Int) (v_ArrVal_1695 (Array Int Int))) (or (< (+ v_subst_23 1) c_~N~0) (forall ((v_subst_22 Int)) (or (< (+ 2 v_subst_22) c_~N~0) (<= c_~N~0 (+ v_subst_22 1)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1695) c_~A~0.base))) (< (+ (select .cse0 (+ c_~A~0.offset (* v_subst_23 4))) (select .cse0 .cse1)) (let ((.cse2 (* v_subst_22 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse2 4)) (select .cse0 (+ c_~A~0.offset .cse2)) 1)))))) (<= c_~N~0 v_subst_23))) (forall ((v_subst_24 Int) (v_ArrVal_1695 (Array Int Int))) (or (< (+ v_subst_24 1) c_~N~0) (forall ((v_subst_21 Int)) (or (< (+ 2 v_subst_21) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1695) c_~A~0.base))) (<= (let ((.cse4 (* v_subst_21 4))) (+ c_~counter~0 (select .cse3 (+ .cse4 c_~A~0.offset)) (select .cse3 (+ .cse4 c_~A~0.offset 4)))) (+ (select .cse3 .cse1) (select .cse3 (+ c_~A~0.offset (* v_subst_24 4)))))) (<= c_~N~0 (+ v_subst_21 1)))) (<= c_~N~0 v_subst_24))))) is different from false [2023-08-24 02:04:07,007 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:04:07,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:07,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-08-24 02:04:07,060 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:04:07,060 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 342 treesize of output 300 [2023-08-24 02:04:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:07,080 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:07,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 44 [2023-08-24 02:04:07,105 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:04:07,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 53 [2023-08-24 02:04:07,161 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:07,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-08-24 02:04:07,179 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:04:07,179 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 334 treesize of output 280 [2023-08-24 02:04:07,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:04:07,187 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:04:07,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:07,189 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-08-24 02:04:07,206 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:04:07,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-08-24 02:04:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:07,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925185025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:07,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:07,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-08-24 02:04:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684742387] [2023-08-24 02:04:07,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 02:04:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:07,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 02:04:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1849, Unknown=1, NotChecked=88, Total=2162 [2023-08-24 02:04:07,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:04:07,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 882 transitions, 20031 flow. Second operand has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:07,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:07,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:04:07,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:04:14,104 INFO L124 PetriNetUnfolderBase]: 2196/3784 cut-off events. [2023-08-24 02:04:14,104 INFO L125 PetriNetUnfolderBase]: For 186630/186630 co-relation queries the response was YES. [2023-08-24 02:04:14,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45516 conditions, 3784 events. 2196/3784 cut-off events. For 186630/186630 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23214 event pairs, 250 based on Foata normal form. 2/3780 useless extension candidates. Maximal degree in co-relation 45349. Up to 3365 conditions per place. [2023-08-24 02:04:14,155 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 774 selfloop transitions, 216 changer transitions 10/1000 dead transitions. [2023-08-24 02:04:14,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1000 transitions, 24338 flow [2023-08-24 02:04:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 02:04:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 02:04:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3282 transitions. [2023-08-24 02:04:14,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26442152755398 [2023-08-24 02:04:14,158 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3282 transitions. [2023-08-24 02:04:14,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3282 transitions. [2023-08-24 02:04:14,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:04:14,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3282 transitions. [2023-08-24 02:04:14,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 56.58620689655172) internal successors, (3282), 58 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:14,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 214.0) internal successors, (12626), 59 states have internal predecessors, (12626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:14,169 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 214.0) internal successors, (12626), 59 states have internal predecessors, (12626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:14,169 INFO L175 Difference]: Start difference. First operand has 514 places, 882 transitions, 20031 flow. Second operand 58 states and 3282 transitions. [2023-08-24 02:04:14,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1000 transitions, 24338 flow [2023-08-24 02:04:14,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1000 transitions, 22038 flow, removed 906 selfloop flow, removed 24 redundant places. [2023-08-24 02:04:15,002 INFO L231 Difference]: Finished difference. Result has 556 places, 927 transitions, 20260 flow [2023-08-24 02:04:15,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=17758, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=20260, PETRI_PLACES=556, PETRI_TRANSITIONS=927} [2023-08-24 02:04:15,003 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 535 predicate places. [2023-08-24 02:04:15,003 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 927 transitions, 20260 flow [2023-08-24 02:04:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:15,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:04:15,003 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:04:15,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-24 02:04:15,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 02:04:15,204 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 02:04:15,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:04:15,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1961719594, now seen corresponding path program 46 times [2023-08-24 02:04:15,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:04:15,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192232566] [2023-08-24 02:04:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:04:15,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:04:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:15,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:04:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192232566] [2023-08-24 02:04:15,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192232566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:04:15,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793804950] [2023-08-24 02:04:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:04:15,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:15,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:04:15,907 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 02:04:15,909 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 02:04:16,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:04:16,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:04:16,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:04:16,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:04:16,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:16,334 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 15 treesize of output 14 [2023-08-24 02:04:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:16,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:16,819 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:16,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 02:04:17,244 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:04:17,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 02:04:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793804950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:17,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-08-24 02:04:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545217221] [2023-08-24 02:04:17,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:04:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:04:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 02:04:17,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:04:17,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 927 transitions, 20260 flow. Second operand has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:17,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:17,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:04:17,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:04:20,271 INFO L124 PetriNetUnfolderBase]: 2324/3994 cut-off events. [2023-08-24 02:04:20,271 INFO L125 PetriNetUnfolderBase]: For 195596/195596 co-relation queries the response was YES. [2023-08-24 02:04:20,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47636 conditions, 3994 events. 2324/3994 cut-off events. For 195596/195596 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24722 event pairs, 326 based on Foata normal form. 2/3986 useless extension candidates. Maximal degree in co-relation 47461. Up to 3449 conditions per place. [2023-08-24 02:04:20,340 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 771 selfloop transitions, 263 changer transitions 7/1041 dead transitions. [2023-08-24 02:04:20,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1041 transitions, 25266 flow [2023-08-24 02:04:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 02:04:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 02:04:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2316 transitions. [2023-08-24 02:04:20,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30062305295950154 [2023-08-24 02:04:20,343 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2316 transitions. [2023-08-24 02:04:20,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2316 transitions. [2023-08-24 02:04:20,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:04:20,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2316 transitions. [2023-08-24 02:04:20,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.33333333333333) internal successors, (2316), 36 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:20,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:20,348 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:20,348 INFO L175 Difference]: Start difference. First operand has 556 places, 927 transitions, 20260 flow. Second operand 36 states and 2316 transitions. [2023-08-24 02:04:20,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1041 transitions, 25266 flow [2023-08-24 02:04:21,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 1041 transitions, 23459 flow, removed 838 selfloop flow, removed 29 redundant places. [2023-08-24 02:04:21,361 INFO L231 Difference]: Finished difference. Result has 567 places, 982 transitions, 21849 flow [2023-08-24 02:04:21,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=18809, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=21849, PETRI_PLACES=567, PETRI_TRANSITIONS=982} [2023-08-24 02:04:21,362 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 546 predicate places. [2023-08-24 02:04:21,362 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 982 transitions, 21849 flow [2023-08-24 02:04:21,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:04:21,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:04:21,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-24 02:04:21,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:21,564 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 02:04:21,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:04:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash -228178390, now seen corresponding path program 47 times [2023-08-24 02:04:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:04:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955220353] [2023-08-24 02:04:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:04:21,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:04:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:22,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:04:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955220353] [2023-08-24 02:04:22,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955220353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:04:22,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224334737] [2023-08-24 02:04:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:04:22,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:04:22,459 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 02:04:22,463 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 02:04:22,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:04:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:04:22,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 105 conjunts are in the unsatisfiable core [2023-08-24 02:04:22,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:04:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:22,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:22,919 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:22,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-08-24 02:04:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:04:22,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:23,232 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 02:04:23,232 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 65 [2023-08-24 02:04:23,266 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:04:23,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:04:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:23,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224334737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:23,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:23,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 9] total 34 [2023-08-24 02:04:23,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594509620] [2023-08-24 02:04:23,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:23,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 02:04:23,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 02:04:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 02:04:23,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:04:23,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 982 transitions, 21849 flow. Second operand has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:23,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:23,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:04:23,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:04:26,672 INFO L124 PetriNetUnfolderBase]: 2479/4260 cut-off events. [2023-08-24 02:04:26,672 INFO L125 PetriNetUnfolderBase]: For 234470/234470 co-relation queries the response was YES. [2023-08-24 02:04:26,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53328 conditions, 4260 events. 2479/4260 cut-off events. For 234470/234470 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 26689 event pairs, 330 based on Foata normal form. 1/4251 useless extension candidates. Maximal degree in co-relation 53149. Up to 3502 conditions per place. [2023-08-24 02:04:26,742 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 805 selfloop transitions, 300 changer transitions 3/1108 dead transitions. [2023-08-24 02:04:26,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1108 transitions, 28823 flow [2023-08-24 02:04:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 02:04:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 02:04:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2162 transitions. [2023-08-24 02:04:26,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2658632562715199 [2023-08-24 02:04:26,744 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2162 transitions. [2023-08-24 02:04:26,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2162 transitions. [2023-08-24 02:04:26,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:04:26,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2162 transitions. [2023-08-24 02:04:26,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 56.89473684210526) internal successors, (2162), 38 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:26,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 214.0) internal successors, (8346), 39 states have internal predecessors, (8346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:26,750 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 214.0) internal successors, (8346), 39 states have internal predecessors, (8346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:26,750 INFO L175 Difference]: Start difference. First operand has 567 places, 982 transitions, 21849 flow. Second operand 38 states and 2162 transitions. [2023-08-24 02:04:26,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1108 transitions, 28823 flow [2023-08-24 02:04:27,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1108 transitions, 27436 flow, removed 619 selfloop flow, removed 26 redundant places. [2023-08-24 02:04:27,891 INFO L231 Difference]: Finished difference. Result has 589 places, 1059 transitions, 25579 flow [2023-08-24 02:04:27,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=20814, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=730, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=25579, PETRI_PLACES=589, PETRI_TRANSITIONS=1059} [2023-08-24 02:04:27,893 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 568 predicate places. [2023-08-24 02:04:27,893 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1059 transitions, 25579 flow [2023-08-24 02:04:27,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 54.55555555555556) internal successors, (1964), 36 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:27,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:04:27,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:04:27,899 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 02:04:28,099 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,SelfDestructingSolverStorable51 [2023-08-24 02:04:28,099 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 02:04:28,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:04:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash -585104404, now seen corresponding path program 48 times [2023-08-24 02:04:28,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:04:28,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906580911] [2023-08-24 02:04:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:04:28,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:04:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:28,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:04:28,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906580911] [2023-08-24 02:04:28,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906580911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:04:28,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453919949] [2023-08-24 02:04:28,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:04:28,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:28,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:04:28,696 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 02:04:28,698 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 02:04:28,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:04:28,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:04:28,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 02:04:28,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:04:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:29,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:29,272 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:29,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:04:29,457 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:04:29,457 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:04:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453919949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:29,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:29,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-08-24 02:04:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480576816] [2023-08-24 02:04:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:04:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:04:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2023-08-24 02:04:29,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:04:29,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1059 transitions, 25579 flow. Second operand has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:29,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:29,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:04:29,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:04:32,095 INFO L124 PetriNetUnfolderBase]: 2601/4455 cut-off events. [2023-08-24 02:04:32,095 INFO L125 PetriNetUnfolderBase]: For 285234/285234 co-relation queries the response was YES. [2023-08-24 02:04:32,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59156 conditions, 4455 events. 2601/4455 cut-off events. For 285234/285234 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 28092 event pairs, 298 based on Foata normal form. 3/4446 useless extension candidates. Maximal degree in co-relation 58965. Up to 3614 conditions per place. [2023-08-24 02:04:32,177 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 823 selfloop transitions, 330 changer transitions 5/1158 dead transitions. [2023-08-24 02:04:32,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1158 transitions, 31635 flow [2023-08-24 02:04:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 02:04:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 02:04:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1947 transitions. [2023-08-24 02:04:32,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30327102803738315 [2023-08-24 02:04:32,179 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1947 transitions. [2023-08-24 02:04:32,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1947 transitions. [2023-08-24 02:04:32,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:04:32,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1947 transitions. [2023-08-24 02:04:32,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.9) internal successors, (1947), 30 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:32,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:32,183 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:32,183 INFO L175 Difference]: Start difference. First operand has 589 places, 1059 transitions, 25579 flow. Second operand 30 states and 1947 transitions. [2023-08-24 02:04:32,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1158 transitions, 31635 flow [2023-08-24 02:04:33,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1158 transitions, 28819 flow, removed 1355 selfloop flow, removed 16 redundant places. [2023-08-24 02:04:33,818 INFO L231 Difference]: Finished difference. Result has 609 places, 1114 transitions, 27246 flow [2023-08-24 02:04:33,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=22919, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=27246, PETRI_PLACES=609, PETRI_TRANSITIONS=1114} [2023-08-24 02:04:33,819 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 588 predicate places. [2023-08-24 02:04:33,819 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1114 transitions, 27246 flow [2023-08-24 02:04:33,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:33,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:04:33,819 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:04:33,824 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 02:04:34,020 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,SelfDestructingSolverStorable52 [2023-08-24 02:04:34,020 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 02:04:34,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:04:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1450497636, now seen corresponding path program 49 times [2023-08-24 02:04:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:04:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150629897] [2023-08-24 02:04:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:04:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:04:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:04:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150629897] [2023-08-24 02:04:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150629897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:04:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156086722] [2023-08-24 02:04:34,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:04:34,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:34,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:04:34,793 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 02:04:34,794 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 02:04:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:34,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 02:04:34,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:04:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:35,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:35,347 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:35,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:04:35,482 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:04:35,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:04:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:35,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156086722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:35,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:35,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-24 02:04:35,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102183015] [2023-08-24 02:04:35,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:35,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 02:04:35,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:35,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 02:04:35,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 02:04:35,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:04:35,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1114 transitions, 27246 flow. Second operand has 33 states, 33 states have (on average 54.666666666666664) internal successors, (1804), 33 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:35,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:35,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:04:35,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:04:38,228 INFO L124 PetriNetUnfolderBase]: 2708/4631 cut-off events. [2023-08-24 02:04:38,228 INFO L125 PetriNetUnfolderBase]: For 300437/300437 co-relation queries the response was YES. [2023-08-24 02:04:38,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61251 conditions, 4631 events. 2708/4631 cut-off events. For 300437/300437 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29325 event pairs, 511 based on Foata normal form. 2/4621 useless extension candidates. Maximal degree in co-relation 61052. Up to 4243 conditions per place. [2023-08-24 02:04:38,309 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1039 selfloop transitions, 154 changer transitions 4/1197 dead transitions. [2023-08-24 02:04:38,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1197 transitions, 32563 flow [2023-08-24 02:04:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 02:04:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 02:04:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1602 transitions. [2023-08-24 02:04:38,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2673564753004005 [2023-08-24 02:04:38,311 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1602 transitions. [2023-08-24 02:04:38,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1602 transitions. [2023-08-24 02:04:38,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:04:38,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1602 transitions. [2023-08-24 02:04:38,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.214285714285715) internal successors, (1602), 28 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:38,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:38,315 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:38,315 INFO L175 Difference]: Start difference. First operand has 609 places, 1114 transitions, 27246 flow. Second operand 28 states and 1602 transitions. [2023-08-24 02:04:38,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1197 transitions, 32563 flow [2023-08-24 02:04:40,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 1197 transitions, 29566 flow, removed 1399 selfloop flow, removed 17 redundant places. [2023-08-24 02:04:40,185 INFO L231 Difference]: Finished difference. Result has 623 places, 1157 transitions, 27308 flow [2023-08-24 02:04:40,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=24301, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=27308, PETRI_PLACES=623, PETRI_TRANSITIONS=1157} [2023-08-24 02:04:40,186 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 602 predicate places. [2023-08-24 02:04:40,186 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 1157 transitions, 27308 flow [2023-08-24 02:04:40,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.666666666666664) internal successors, (1804), 33 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:40,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:04:40,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:04:40,192 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 02:04:40,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:40,387 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 02:04:40,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:04:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash -421139476, now seen corresponding path program 50 times [2023-08-24 02:04:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:04:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992655421] [2023-08-24 02:04:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:04:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:04:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:41,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:04:41,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992655421] [2023-08-24 02:04:41,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992655421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:04:41,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475707739] [2023-08-24 02:04:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:04:41,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:04:41,427 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 02:04:41,430 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 02:04:41,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:04:41,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:04:41,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 104 conjunts are in the unsatisfiable core [2023-08-24 02:04:41,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:04:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:41,681 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 02:04:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:41,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:42,175 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:42,175 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-08-24 02:04:42,203 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:42,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-08-24 02:04:42,466 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:04:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:04:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475707739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:42,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:42,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 02:04:42,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631266168] [2023-08-24 02:04:42,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 02:04:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 02:04:42,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1178, Unknown=8, NotChecked=0, Total=1332 [2023-08-24 02:04:42,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:04:42,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1157 transitions, 27308 flow. Second operand has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:04:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:04:45,775 INFO L124 PetriNetUnfolderBase]: 2785/4752 cut-off events. [2023-08-24 02:04:45,775 INFO L125 PetriNetUnfolderBase]: For 297396/297396 co-relation queries the response was YES. [2023-08-24 02:04:45,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61082 conditions, 4752 events. 2785/4752 cut-off events. For 297396/297396 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 30204 event pairs, 358 based on Foata normal form. 1/4725 useless extension candidates. Maximal degree in co-relation 60879. Up to 3866 conditions per place. [2023-08-24 02:04:45,864 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 790 selfloop transitions, 445 changer transitions 1/1236 dead transitions. [2023-08-24 02:04:45,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1236 transitions, 32564 flow [2023-08-24 02:04:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 02:04:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 02:04:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1773 transitions. [2023-08-24 02:04:45,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26725957190232136 [2023-08-24 02:04:45,866 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1773 transitions. [2023-08-24 02:04:45,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1773 transitions. [2023-08-24 02:04:45,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:04:45,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1773 transitions. [2023-08-24 02:04:45,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.193548387096776) internal successors, (1773), 31 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:45,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:45,870 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:45,870 INFO L175 Difference]: Start difference. First operand has 623 places, 1157 transitions, 27308 flow. Second operand 31 states and 1773 transitions. [2023-08-24 02:04:45,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1236 transitions, 32564 flow [2023-08-24 02:04:47,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1236 transitions, 30475 flow, removed 998 selfloop flow, removed 16 redundant places. [2023-08-24 02:04:47,676 INFO L231 Difference]: Finished difference. Result has 645 places, 1203 transitions, 29195 flow [2023-08-24 02:04:47,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=25219, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=29195, PETRI_PLACES=645, PETRI_TRANSITIONS=1203} [2023-08-24 02:04:47,678 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-08-24 02:04:47,678 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1203 transitions, 29195 flow [2023-08-24 02:04:47,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:47,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:04:47,678 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:04:47,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-08-24 02:04:47,879 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,SelfDestructingSolverStorable54 [2023-08-24 02:04:47,879 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 02:04:47,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:04:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash 616654216, now seen corresponding path program 51 times [2023-08-24 02:04:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:04:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456059999] [2023-08-24 02:04:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:04:47,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:04:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:04:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:04:48,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:04:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456059999] [2023-08-24 02:04:48,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456059999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:04:48,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650772750] [2023-08-24 02:04:48,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:04:48,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:04:48,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:04:48,665 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 02:04:48,666 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 02:04:48,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:04:48,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:04:48,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 113 conjunts are in the unsatisfiable core [2023-08-24 02:04:48,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:04:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:04:48,956 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 02:04:49,189 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:04:49,189 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 17 treesize of output 14 [2023-08-24 02:04:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:04:49,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:04:52,028 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1925 (Array Int Int)) (v_subst_30 Int)) (or (<= c_~N~0 v_subst_30) (forall ((v_subst_28 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1925) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* v_subst_30 4)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* v_subst_28 4)))))) (<= c_~N~0 v_subst_28) (< (+ v_subst_28 1) c_~N~0))) (< (+ v_subst_30 1) c_~N~0))) (forall ((v_subst_29 Int) (v_ArrVal_1925 (Array Int Int))) (or (< (+ v_subst_29 1) c_~N~0) (<= c_~N~0 v_subst_29) (forall ((v_subst_27 Int)) (or (< (+ v_subst_27 1) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1925) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2) (select .cse3 (+ c_~A~0.offset (* v_subst_27 4)))) (+ (select .cse3 .cse1) c_~counter~0 (select .cse3 (+ c_~A~0.offset (* v_subst_29 4))) 1))) (<= c_~N~0 v_subst_27))))))) is different from false [2023-08-24 02:04:52,118 INFO L322 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-08-24 02:04:52,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 129 [2023-08-24 02:04:52,172 INFO L322 Elim1Store]: treesize reduction 30, result has 62.0 percent of original size [2023-08-24 02:04:52,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 64 [2023-08-24 02:04:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:04:52,281 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:04:52,281 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 21 treesize of output 10 [2023-08-24 02:04:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:04:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650772750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:04:52,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:04:52,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 02:04:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334770800] [2023-08-24 02:04:52,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:04:52,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:04:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:04:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:04:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1549, Unknown=1, NotChecked=80, Total=1806 [2023-08-24 02:04:52,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 02:04:52,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1203 transitions, 29195 flow. Second operand has 43 states, 43 states have (on average 57.46511627906977) internal successors, (2471), 43 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:04:52,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:04:52,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 02:04:52,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:05:03,669 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 83 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:05:07,510 INFO L124 PetriNetUnfolderBase]: 2936/5058 cut-off events. [2023-08-24 02:05:07,510 INFO L125 PetriNetUnfolderBase]: For 321375/321375 co-relation queries the response was YES. [2023-08-24 02:05:07,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64678 conditions, 5058 events. 2936/5058 cut-off events. For 321375/321375 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 33051 event pairs, 266 based on Foata normal form. 2/5016 useless extension candidates. Maximal degree in co-relation 64467. Up to 4385 conditions per place. [2023-08-24 02:05:07,593 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1032 selfloop transitions, 280 changer transitions 9/1321 dead transitions. [2023-08-24 02:05:07,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 1321 transitions, 34416 flow [2023-08-24 02:05:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 02:05:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 02:05:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2111 transitions. [2023-08-24 02:05:07,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28184245660881174 [2023-08-24 02:05:07,602 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2111 transitions. [2023-08-24 02:05:07,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2111 transitions. [2023-08-24 02:05:07,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:05:07,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2111 transitions. [2023-08-24 02:05:07,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.31428571428572) internal successors, (2111), 35 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:07,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 214.0) internal successors, (7704), 36 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:07,609 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 214.0) internal successors, (7704), 36 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:07,609 INFO L175 Difference]: Start difference. First operand has 645 places, 1203 transitions, 29195 flow. Second operand 35 states and 2111 transitions. [2023-08-24 02:05:07,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 1321 transitions, 34416 flow [2023-08-24 02:05:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 663 places, 1321 transitions, 31859 flow, removed 1186 selfloop flow, removed 16 redundant places. [2023-08-24 02:05:09,746 INFO L231 Difference]: Finished difference. Result has 674 places, 1256 transitions, 29321 flow [2023-08-24 02:05:09,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=26654, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=935, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=29321, PETRI_PLACES=674, PETRI_TRANSITIONS=1256} [2023-08-24 02:05:09,747 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 653 predicate places. [2023-08-24 02:05:09,748 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 1256 transitions, 29321 flow [2023-08-24 02:05:09,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 57.46511627906977) internal successors, (2471), 43 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:09,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:05:09,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:05:09,753 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 02:05:09,948 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,SelfDestructingSolverStorable55 [2023-08-24 02:05:09,949 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 02:05:09,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:05:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1920618146, now seen corresponding path program 52 times [2023-08-24 02:05:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:05:09,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030417244] [2023-08-24 02:05:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:05:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:05:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:10,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:05:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030417244] [2023-08-24 02:05:10,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030417244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:05:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198690306] [2023-08-24 02:05:10,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:05:10,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:05:10,797 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 02:05:10,798 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 02:05:10,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:05:10,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:05:10,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:05:10,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:05:11,343 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:11,343 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 15 treesize of output 14 [2023-08-24 02:05:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:11,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:05:11,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:11,872 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 02:05:12,214 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:05:12,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 02:05:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:12,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198690306] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:05:12,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:05:12,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 02:05:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26393416] [2023-08-24 02:05:12,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:05:12,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 02:05:12,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:05:12,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 02:05:12,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 02:05:12,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:05:12,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 1256 transitions, 29321 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:12,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:05:12,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:05:12,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:05:16,466 INFO L124 PetriNetUnfolderBase]: 3005/5174 cut-off events. [2023-08-24 02:05:16,467 INFO L125 PetriNetUnfolderBase]: For 332350/332350 co-relation queries the response was YES. [2023-08-24 02:05:16,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64910 conditions, 5174 events. 3005/5174 cut-off events. For 332350/332350 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 33950 event pairs, 404 based on Foata normal form. 2/5124 useless extension candidates. Maximal degree in co-relation 64689. Up to 4697 conditions per place. [2023-08-24 02:05:16,555 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1117 selfloop transitions, 214 changer transitions 4/1335 dead transitions. [2023-08-24 02:05:16,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1335 transitions, 33884 flow [2023-08-24 02:05:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 02:05:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 02:05:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1782 transitions. [2023-08-24 02:05:16,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26861621947542963 [2023-08-24 02:05:16,557 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1782 transitions. [2023-08-24 02:05:16,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1782 transitions. [2023-08-24 02:05:16,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:05:16,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1782 transitions. [2023-08-24 02:05:16,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.483870967741936) internal successors, (1782), 31 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:16,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:16,625 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:16,625 INFO L175 Difference]: Start difference. First operand has 674 places, 1256 transitions, 29321 flow. Second operand 31 states and 1782 transitions. [2023-08-24 02:05:16,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1335 transitions, 33884 flow [2023-08-24 02:05:18,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 679 places, 1335 transitions, 32659 flow, removed 468 selfloop flow, removed 25 redundant places. [2023-08-24 02:05:18,562 INFO L231 Difference]: Finished difference. Result has 685 places, 1286 transitions, 30118 flow [2023-08-24 02:05:18,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=28096, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30118, PETRI_PLACES=685, PETRI_TRANSITIONS=1286} [2023-08-24 02:05:18,563 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 664 predicate places. [2023-08-24 02:05:18,563 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 1286 transitions, 30118 flow [2023-08-24 02:05:18,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:18,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:05:18,563 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:05:18,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-24 02:05:18,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:18,764 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 02:05:18,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:05:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1059102814, now seen corresponding path program 53 times [2023-08-24 02:05:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:05:18,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904524927] [2023-08-24 02:05:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:05:18,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:05:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:19,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:05:19,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904524927] [2023-08-24 02:05:19,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904524927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:05:19,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537795655] [2023-08-24 02:05:19,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:05:19,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:19,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:05:19,637 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 02:05:19,639 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 02:05:19,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 02:05:19,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:05:19,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 114 conjunts are in the unsatisfiable core [2023-08-24 02:05:19,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:05:19,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:05:19,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:05:19,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:05:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:20,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:05:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:05:20,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537795655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:05:20,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:05:20,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 35 [2023-08-24 02:05:20,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877294684] [2023-08-24 02:05:20,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:05:20,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 02:05:20,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:05:20,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 02:05:20,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 02:05:20,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:05:20,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1286 transitions, 30118 flow. Second operand has 37 states, 37 states have (on average 54.513513513513516) internal successors, (2017), 37 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 02:05:20,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:05:20,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:05:20,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:05:24,637 INFO L124 PetriNetUnfolderBase]: 3126/5376 cut-off events. [2023-08-24 02:05:24,637 INFO L125 PetriNetUnfolderBase]: For 370923/370923 co-relation queries the response was YES. [2023-08-24 02:05:24,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69783 conditions, 5376 events. 3126/5376 cut-off events. For 370923/370923 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35417 event pairs, 300 based on Foata normal form. 3/5327 useless extension candidates. Maximal degree in co-relation 69557. Up to 4778 conditions per place. [2023-08-24 02:05:24,730 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1092 selfloop transitions, 287 changer transitions 3/1382 dead transitions. [2023-08-24 02:05:24,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1382 transitions, 35869 flow [2023-08-24 02:05:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 02:05:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 02:05:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2082 transitions. [2023-08-24 02:05:24,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2702492211838006 [2023-08-24 02:05:24,735 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2082 transitions. [2023-08-24 02:05:24,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2082 transitions. [2023-08-24 02:05:24,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:05:24,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2082 transitions. [2023-08-24 02:05:24,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.833333333333336) internal successors, (2082), 36 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:24,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:24,741 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:24,742 INFO L175 Difference]: Start difference. First operand has 685 places, 1286 transitions, 30118 flow. Second operand 36 states and 2082 transitions. [2023-08-24 02:05:24,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1382 transitions, 35869 flow [2023-08-24 02:05:26,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1382 transitions, 35435 flow, removed 159 selfloop flow, removed 22 redundant places. [2023-08-24 02:05:26,628 INFO L231 Difference]: Finished difference. Result has 706 places, 1313 transitions, 32395 flow [2023-08-24 02:05:26,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=29684, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1014, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32395, PETRI_PLACES=706, PETRI_TRANSITIONS=1313} [2023-08-24 02:05:26,630 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 685 predicate places. [2023-08-24 02:05:26,630 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 1313 transitions, 32395 flow [2023-08-24 02:05:26,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.513513513513516) internal successors, (2017), 37 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 02:05:26,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:05:26,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:05:26,637 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 02:05:26,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:26,837 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 02:05:26,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:05:26,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1018260868, now seen corresponding path program 54 times [2023-08-24 02:05:26,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:05:26,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303007033] [2023-08-24 02:05:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:05:26,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:05:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:27,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:05:27,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303007033] [2023-08-24 02:05:27,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303007033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:05:27,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516894007] [2023-08-24 02:05:27,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:05:27,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:27,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:05:27,736 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 02:05:27,738 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 02:05:27,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:05:27,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:05:27,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 02:05:27,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:05:28,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:05:28,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:05:28,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:05:28,345 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:28,345 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 15 treesize of output 14 [2023-08-24 02:05:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:28,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:05:29,165 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_subst_34 Int) (v_ArrVal_2047 (Array Int Int))) (or (<= c_~N~0 v_subst_34) (< (+ v_subst_34 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2047) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* v_subst_34 4)))) (select .cse0 .cse1))))) (forall ((v_ArrVal_2047 (Array Int Int)) (v_subst_33 Int)) (or (<= c_~N~0 v_subst_33) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2047) c_~A~0.base))) (< (select .cse2 .cse1) (+ c_~counter~0 (select .cse2 (+ c_~A~0.offset (* v_subst_33 4))) 1))) (< (+ v_subst_33 1) c_~N~0))))) is different from false [2023-08-24 02:05:29,284 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:29,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-08-24 02:05:29,292 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:29,293 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 198 treesize of output 178 [2023-08-24 02:05:29,308 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:29,308 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 35 treesize of output 34 [2023-08-24 02:05:29,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:29,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2023-08-24 02:05:29,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:29,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-24 02:05:29,396 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:05:29,396 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 98 treesize of output 88 [2023-08-24 02:05:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:05:29,405 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 46 treesize of output 35 [2023-08-24 02:05:29,413 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:05:29,414 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 72 treesize of output 56 [2023-08-24 02:05:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:29,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516894007] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:05:29,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:05:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 02:05:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831235748] [2023-08-24 02:05:29,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:05:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 02:05:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:05:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 02:05:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1665, Unknown=1, NotChecked=84, Total=1980 [2023-08-24 02:05:29,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:05:29,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 1313 transitions, 32395 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:29,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:05:29,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:05:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:05:34,694 INFO L124 PetriNetUnfolderBase]: 3227/5570 cut-off events. [2023-08-24 02:05:34,694 INFO L125 PetriNetUnfolderBase]: For 424487/424487 co-relation queries the response was YES. [2023-08-24 02:05:34,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74061 conditions, 5570 events. 3227/5570 cut-off events. For 424487/424487 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 37189 event pairs, 328 based on Foata normal form. 2/5520 useless extension candidates. Maximal degree in co-relation 73826. Up to 5132 conditions per place. [2023-08-24 02:05:34,798 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1194 selfloop transitions, 213 changer transitions 9/1416 dead transitions. [2023-08-24 02:05:34,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 1416 transitions, 37363 flow [2023-08-24 02:05:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 02:05:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 02:05:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2389 transitions. [2023-08-24 02:05:34,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2657988429016466 [2023-08-24 02:05:34,801 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2389 transitions. [2023-08-24 02:05:34,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2389 transitions. [2023-08-24 02:05:34,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:05:34,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2389 transitions. [2023-08-24 02:05:34,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 56.88095238095238) internal successors, (2389), 42 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:34,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 214.0) internal successors, (9202), 43 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:34,806 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 214.0) internal successors, (9202), 43 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:34,807 INFO L175 Difference]: Start difference. First operand has 706 places, 1313 transitions, 32395 flow. Second operand 42 states and 2389 transitions. [2023-08-24 02:05:34,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 1416 transitions, 37363 flow [2023-08-24 02:05:37,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 1416 transitions, 35982 flow, removed 628 selfloop flow, removed 17 redundant places. [2023-08-24 02:05:37,301 INFO L231 Difference]: Finished difference. Result has 739 places, 1354 transitions, 33108 flow [2023-08-24 02:05:37,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=31190, PETRI_DIFFERENCE_MINUEND_PLACES=689, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=33108, PETRI_PLACES=739, PETRI_TRANSITIONS=1354} [2023-08-24 02:05:37,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 718 predicate places. [2023-08-24 02:05:37,303 INFO L495 AbstractCegarLoop]: Abstraction has has 739 places, 1354 transitions, 33108 flow [2023-08-24 02:05:37,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:37,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:05:37,303 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:05:37,311 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 02:05:37,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:37,509 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 02:05:37,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:05:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2137608246, now seen corresponding path program 55 times [2023-08-24 02:05:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:05:37,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541017440] [2023-08-24 02:05:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:05:37,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:05:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:38,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:05:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541017440] [2023-08-24 02:05:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541017440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:05:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74376338] [2023-08-24 02:05:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:05:38,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:05:38,389 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 02:05:38,390 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 02:05:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:38,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:05:38,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:05:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:05:38,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:05:39,007 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:39,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:05:39,130 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:05:39,130 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:05:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:05:39,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74376338] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:05:39,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:05:39,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 02:05:39,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563769991] [2023-08-24 02:05:39,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:05:39,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:05:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:05:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:05:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 02:05:39,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:05:39,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 739 places, 1354 transitions, 33108 flow. Second operand has 35 states, 35 states have (on average 54.628571428571426) internal successors, (1912), 35 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:05:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:05:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:05:43,329 INFO L124 PetriNetUnfolderBase]: 3290/5681 cut-off events. [2023-08-24 02:05:43,329 INFO L125 PetriNetUnfolderBase]: For 445325/445325 co-relation queries the response was YES. [2023-08-24 02:05:43,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76176 conditions, 5681 events. 3290/5681 cut-off events. For 445325/445325 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 38061 event pairs, 454 based on Foata normal form. 2/5631 useless extension candidates. Maximal degree in co-relation 75931. Up to 5385 conditions per place. [2023-08-24 02:05:43,433 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1277 selfloop transitions, 132 changer transitions 2/1411 dead transitions. [2023-08-24 02:05:43,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 1411 transitions, 38055 flow [2023-08-24 02:05:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 02:05:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 02:05:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1540 transitions. [2023-08-24 02:05:43,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2665282104534441 [2023-08-24 02:05:43,435 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1540 transitions. [2023-08-24 02:05:43,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1540 transitions. [2023-08-24 02:05:43,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:05:43,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1540 transitions. [2023-08-24 02:05:43,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.03703703703704) internal successors, (1540), 27 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:43,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 214.0) internal successors, (5992), 28 states have internal predecessors, (5992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:43,441 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 214.0) internal successors, (5992), 28 states have internal predecessors, (5992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:43,441 INFO L175 Difference]: Start difference. First operand has 739 places, 1354 transitions, 33108 flow. Second operand 27 states and 1540 transitions. [2023-08-24 02:05:43,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 1411 transitions, 38055 flow [2023-08-24 02:05:46,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 1411 transitions, 37458 flow, removed 249 selfloop flow, removed 24 redundant places. [2023-08-24 02:05:46,028 INFO L231 Difference]: Finished difference. Result has 749 places, 1374 transitions, 34302 flow [2023-08-24 02:05:46,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=32513, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=34302, PETRI_PLACES=749, PETRI_TRANSITIONS=1374} [2023-08-24 02:05:46,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 728 predicate places. [2023-08-24 02:05:46,029 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 1374 transitions, 34302 flow [2023-08-24 02:05:46,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.628571428571426) internal successors, (1912), 35 states have internal predecessors, (1912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:46,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:05:46,030 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:05:46,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-08-24 02:05:46,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-24 02:05:46,233 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 02:05:46,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:05:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -791242666, now seen corresponding path program 56 times [2023-08-24 02:05:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:05:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949992] [2023-08-24 02:05:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:05:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:05:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:46,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:05:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949992] [2023-08-24 02:05:46,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:05:46,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471310188] [2023-08-24 02:05:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:05:46,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:46,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:05:46,875 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 02:05:46,877 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 02:05:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:05:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:05:47,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:05:47,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:05:47,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:05:47,384 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:47,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 41 [2023-08-24 02:05:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:47,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:05:48,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:48,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-08-24 02:05:48,651 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:05:48,651 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-24 02:05:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471310188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:05:48,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:05:48,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-08-24 02:05:48,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754153379] [2023-08-24 02:05:48,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:05:48,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:05:48,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:05:48,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:05:48,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 02:05:48,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:05:48,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 1374 transitions, 34302 flow. Second operand has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:48,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:05:48,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:05:48,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:05:54,513 INFO L124 PetriNetUnfolderBase]: 3417/5900 cut-off events. [2023-08-24 02:05:54,513 INFO L125 PetriNetUnfolderBase]: For 495820/495820 co-relation queries the response was YES. [2023-08-24 02:05:54,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80858 conditions, 5900 events. 3417/5900 cut-off events. For 495820/495820 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39693 event pairs, 555 based on Foata normal form. 2/5850 useless extension candidates. Maximal degree in co-relation 80604. Up to 5499 conditions per place. [2023-08-24 02:05:54,750 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1297 selfloop transitions, 208 changer transitions 6/1511 dead transitions. [2023-08-24 02:05:54,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 800 places, 1511 transitions, 41148 flow [2023-08-24 02:05:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 02:05:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 02:05:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3313 transitions. [2023-08-24 02:05:54,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2977174694464414 [2023-08-24 02:05:54,753 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3313 transitions. [2023-08-24 02:05:54,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3313 transitions. [2023-08-24 02:05:54,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:05:54,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3313 transitions. [2023-08-24 02:05:54,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 63.71153846153846) internal successors, (3313), 52 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:54,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 214.0) internal successors, (11342), 53 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:54,761 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 214.0) internal successors, (11342), 53 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:54,761 INFO L175 Difference]: Start difference. First operand has 749 places, 1374 transitions, 34302 flow. Second operand 52 states and 3313 transitions. [2023-08-24 02:05:54,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 800 places, 1511 transitions, 41148 flow [2023-08-24 02:05:57,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 1511 transitions, 39865 flow, removed 556 selfloop flow, removed 15 redundant places. [2023-08-24 02:05:57,783 INFO L231 Difference]: Finished difference. Result has 792 places, 1439 transitions, 36564 flow [2023-08-24 02:05:57,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=33114, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=36564, PETRI_PLACES=792, PETRI_TRANSITIONS=1439} [2023-08-24 02:05:57,785 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 771 predicate places. [2023-08-24 02:05:57,785 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 1439 transitions, 36564 flow [2023-08-24 02:05:57,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:05:57,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:05:57,786 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:05:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-24 02:05:57,991 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,SelfDestructingSolverStorable60 [2023-08-24 02:05:57,992 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 02:05:57,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:05:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1574304502, now seen corresponding path program 57 times [2023-08-24 02:05:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:05:57,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945448979] [2023-08-24 02:05:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:05:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:05:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:05:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:05:58,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:05:58,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945448979] [2023-08-24 02:05:58,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945448979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:05:58,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682303093] [2023-08-24 02:05:58,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:05:58,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:05:58,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:05:58,695 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 02:05:58,696 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 02:05:58,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:05:58,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:05:58,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 115 conjunts are in the unsatisfiable core [2023-08-24 02:05:58,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:05:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:05:59,102 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 02:05:59,279 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:05:59,280 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 17 treesize of output 14 [2023-08-24 02:05:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:05:59,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:06:02,156 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_subst_39 Int) (v_ArrVal_2162 (Array Int Int))) (or (<= c_~N~0 v_subst_39) (< (+ v_subst_39 1) c_~N~0) (forall ((v_subst_37 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2162) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 (+ c_~A~0.offset (* v_subst_39 4))) (select .cse0 c_~A~0.offset)) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_37 4))) c_~counter~0 1 (select .cse0 .cse2)))) (<= c_~N~0 v_subst_37) (< (+ v_subst_37 1) c_~N~0))))) (forall ((v_subst_40 Int) (v_ArrVal_2162 (Array Int Int))) (or (forall ((v_subst_38 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2162) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse3 (+ c_~A~0.offset (* v_subst_38 4))) (select .cse3 .cse2)) (+ (select .cse3 (+ c_~A~0.offset (* v_subst_40 4))) (select .cse3 .cse1) (select .cse3 c_~A~0.offset)))) (<= c_~N~0 v_subst_38) (< (+ v_subst_38 1) c_~N~0))) (<= c_~N~0 v_subst_40) (< (+ v_subst_40 1) c_~N~0))))) is different from false [2023-08-24 02:06:02,247 INFO L322 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-08-24 02:06:02,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 127 [2023-08-24 02:06:02,299 INFO L322 Elim1Store]: treesize reduction 30, result has 62.0 percent of original size [2023-08-24 02:06:02,300 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 63 [2023-08-24 02:06:02,413 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:06:02,418 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:06:02,418 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 22 treesize of output 11 [2023-08-24 02:06:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:06:02,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682303093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:06:02,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:06:02,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2023-08-24 02:06:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636954522] [2023-08-24 02:06:02,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:06:02,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:06:02,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:06:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:06:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1522, Unknown=1, NotChecked=80, Total=1806 [2023-08-24 02:06:02,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 02:06:02,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 1439 transitions, 36564 flow. Second operand has 43 states, 43 states have (on average 57.395348837209305) internal successors, (2468), 43 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:02,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:06:02,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 02:06:02,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:06:10,676 INFO L124 PetriNetUnfolderBase]: 3624/6281 cut-off events. [2023-08-24 02:06:10,676 INFO L125 PetriNetUnfolderBase]: For 557302/557302 co-relation queries the response was YES. [2023-08-24 02:06:10,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85989 conditions, 6281 events. 3624/6281 cut-off events. For 557302/557302 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 42852 event pairs, 367 based on Foata normal form. 1/6228 useless extension candidates. Maximal degree in co-relation 85727. Up to 5152 conditions per place. [2023-08-24 02:06:10,801 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1123 selfloop transitions, 467 changer transitions 13/1603 dead transitions. [2023-08-24 02:06:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 1603 transitions, 43745 flow [2023-08-24 02:06:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 02:06:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 02:06:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2873 transitions. [2023-08-24 02:06:10,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2796923676012461 [2023-08-24 02:06:10,803 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2873 transitions. [2023-08-24 02:06:10,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2873 transitions. [2023-08-24 02:06:10,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:06:10,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2873 transitions. [2023-08-24 02:06:10,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 59.854166666666664) internal successors, (2873), 48 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:10,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 214.0) internal successors, (10486), 49 states have internal predecessors, (10486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:10,810 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 214.0) internal successors, (10486), 49 states have internal predecessors, (10486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:10,810 INFO L175 Difference]: Start difference. First operand has 792 places, 1439 transitions, 36564 flow. Second operand 48 states and 2873 transitions. [2023-08-24 02:06:10,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 1603 transitions, 43745 flow [2023-08-24 02:06:13,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 817 places, 1603 transitions, 42598 flow, removed 514 selfloop flow, removed 22 redundant places. [2023-08-24 02:06:14,004 INFO L231 Difference]: Finished difference. Result has 831 places, 1521 transitions, 39871 flow [2023-08-24 02:06:14,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=35421, PETRI_DIFFERENCE_MINUEND_PLACES=770, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=39871, PETRI_PLACES=831, PETRI_TRANSITIONS=1521} [2023-08-24 02:06:14,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 810 predicate places. [2023-08-24 02:06:14,005 INFO L495 AbstractCegarLoop]: Abstraction has has 831 places, 1521 transitions, 39871 flow [2023-08-24 02:06:14,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 57.395348837209305) internal successors, (2468), 43 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:14,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:06:14,005 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:06:14,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-08-24 02:06:14,206 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,SelfDestructingSolverStorable61 [2023-08-24 02:06:14,206 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 02:06:14,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:06:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash -463151892, now seen corresponding path program 58 times [2023-08-24 02:06:14,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:06:14,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486037284] [2023-08-24 02:06:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:06:14,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:06:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:06:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:15,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:06:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486037284] [2023-08-24 02:06:15,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486037284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:06:15,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454510140] [2023-08-24 02:06:15,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:06:15,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:06:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:06:15,096 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 02:06:15,098 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 02:06:15,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:06:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:06:15,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-24 02:06:15,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:06:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:06:15,469 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 02:06:15,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:15,662 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 15 treesize of output 14 [2023-08-24 02:06:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:15,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:06:16,195 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 8)) (.cse3 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_2201 (Array Int Int)) (v_subst_41 Int)) (or (<= c_~N~0 v_subst_41) (< (+ v_subst_41 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2201) c_~A~0.base))) (<= (+ (select .cse0 (+ c_~A~0.offset (* v_subst_41 4))) c_~counter~0 (select .cse0 .cse1)) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2) (select .cse0 .cse3)))))) (forall ((v_ArrVal_2201 (Array Int Int)) (v_subst_42 Int)) (or (< (+ v_subst_42 1) c_~N~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2201) c_~A~0.base))) (< (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse2) (select .cse4 .cse3)) (+ c_~counter~0 (select .cse4 (+ c_~A~0.offset (* v_subst_42 4))) (select .cse4 .cse1) 1))) (<= c_~N~0 v_subst_42))))) is different from false [2023-08-24 02:06:16,245 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:16,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 147 [2023-08-24 02:06:16,278 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:16,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 76 [2023-08-24 02:06:16,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:06:17,030 INFO L322 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-24 02:06:17,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-24 02:06:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:17,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454510140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:06:17,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:06:17,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-08-24 02:06:17,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496722694] [2023-08-24 02:06:17,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:06:17,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 02:06:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:06:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 02:06:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1629, Unknown=1, NotChecked=82, Total=1892 [2023-08-24 02:06:17,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:06:17,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 831 places, 1521 transitions, 39871 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 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 02:06:17,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:06:17,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:06:17,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:06:23,055 INFO L124 PetriNetUnfolderBase]: 3673/6365 cut-off events. [2023-08-24 02:06:23,055 INFO L125 PetriNetUnfolderBase]: For 616419/616419 co-relation queries the response was YES. [2023-08-24 02:06:23,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89976 conditions, 6365 events. 3673/6365 cut-off events. For 616419/616419 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43623 event pairs, 431 based on Foata normal form. 1/6316 useless extension candidates. Maximal degree in co-relation 89700. Up to 5320 conditions per place. [2023-08-24 02:06:23,191 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 1195 selfloop transitions, 422 changer transitions 3/1620 dead transitions. [2023-08-24 02:06:23,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 862 places, 1620 transitions, 45894 flow [2023-08-24 02:06:23,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 02:06:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 02:06:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1830 transitions. [2023-08-24 02:06:23,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26723130841121495 [2023-08-24 02:06:23,193 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1830 transitions. [2023-08-24 02:06:23,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1830 transitions. [2023-08-24 02:06:23,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:06:23,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1830 transitions. [2023-08-24 02:06:23,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.1875) internal successors, (1830), 32 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:23,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:23,197 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:23,197 INFO L175 Difference]: Start difference. First operand has 831 places, 1521 transitions, 39871 flow. Second operand 32 states and 1830 transitions. [2023-08-24 02:06:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 862 places, 1620 transitions, 45894 flow [2023-08-24 02:06:27,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 1620 transitions, 42997 flow, removed 1219 selfloop flow, removed 32 redundant places. [2023-08-24 02:06:27,396 INFO L231 Difference]: Finished difference. Result has 832 places, 1557 transitions, 39776 flow [2023-08-24 02:06:27,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=37149, PETRI_DIFFERENCE_MINUEND_PLACES=799, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=39776, PETRI_PLACES=832, PETRI_TRANSITIONS=1557} [2023-08-24 02:06:27,397 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 811 predicate places. [2023-08-24 02:06:27,398 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 1557 transitions, 39776 flow [2023-08-24 02:06:27,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 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 02:06:27,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:06:27,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:06:27,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-08-24 02:06:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:06:27,599 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 02:06:27,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:06:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 424895574, now seen corresponding path program 59 times [2023-08-24 02:06:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:06:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368747198] [2023-08-24 02:06:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:06:27,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:06:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:06:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:28,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:06:28,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368747198] [2023-08-24 02:06:28,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368747198] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:06:28,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875977063] [2023-08-24 02:06:28,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:06:28,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:06:28,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:06:28,443 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 02:06:28,445 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 02:06:28,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 02:06:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:06:28,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-08-24 02:06:28,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:06:28,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:06:28,767 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 02:06:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:06:28,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:06:29,174 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 8)) (.cse4 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset .cse6)) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_2240 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2240) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0 (select .cse0 .cse2)) (+ (select .cse0 .cse3) (select .cse0 c_~A~0.offset) (select .cse0 .cse4))))) (forall ((v_ArrVal_2240 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2240) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 c_~A~0.offset) (select .cse5 .cse4)) (+ (select .cse5 .cse1) c_~counter~0 (select .cse5 .cse2) 1))))))) is different from false [2023-08-24 02:06:29,212 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:29,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 134 [2023-08-24 02:06:29,241 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:29,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 70 [2023-08-24 02:06:29,453 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:06:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:06:29,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875977063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:06:29,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:06:29,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-08-24 02:06:29,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332068938] [2023-08-24 02:06:29,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:06:29,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:06:29,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:06:29,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:06:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1257, Unknown=1, NotChecked=72, Total=1482 [2023-08-24 02:06:29,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:06:29,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1557 transitions, 39776 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:29,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:06:29,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:06:29,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:06:35,652 INFO L124 PetriNetUnfolderBase]: 3801/6585 cut-off events. [2023-08-24 02:06:35,653 INFO L125 PetriNetUnfolderBase]: For 645011/645011 co-relation queries the response was YES. [2023-08-24 02:06:35,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92351 conditions, 6585 events. 3801/6585 cut-off events. For 645011/645011 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 45445 event pairs, 471 based on Foata normal form. 1/6534 useless extension candidates. Maximal degree in co-relation 92076. Up to 5816 conditions per place. [2023-08-24 02:06:35,803 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1299 selfloop transitions, 373 changer transitions 1/1673 dead transitions. [2023-08-24 02:06:35,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 872 places, 1673 transitions, 46651 flow [2023-08-24 02:06:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 02:06:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 02:06:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2344 transitions. [2023-08-24 02:06:35,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2671529519033508 [2023-08-24 02:06:35,806 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2344 transitions. [2023-08-24 02:06:35,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2344 transitions. [2023-08-24 02:06:35,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:06:35,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2344 transitions. [2023-08-24 02:06:35,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.170731707317074) internal successors, (2344), 41 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:35,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 214.0) internal successors, (8988), 42 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:35,812 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 214.0) internal successors, (8988), 42 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:35,812 INFO L175 Difference]: Start difference. First operand has 832 places, 1557 transitions, 39776 flow. Second operand 41 states and 2344 transitions. [2023-08-24 02:06:35,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 872 places, 1673 transitions, 46651 flow [2023-08-24 02:06:40,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 1673 transitions, 45982 flow, removed 188 selfloop flow, removed 24 redundant places. [2023-08-24 02:06:40,098 INFO L231 Difference]: Finished difference. Result has 859 places, 1617 transitions, 42989 flow [2023-08-24 02:06:40,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=39149, PETRI_DIFFERENCE_MINUEND_PLACES=808, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=42989, PETRI_PLACES=859, PETRI_TRANSITIONS=1617} [2023-08-24 02:06:40,099 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 838 predicate places. [2023-08-24 02:06:40,099 INFO L495 AbstractCegarLoop]: Abstraction has has 859 places, 1617 transitions, 42989 flow [2023-08-24 02:06:40,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:40,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:06:40,100 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:06:40,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-08-24 02:06:40,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:06:40,305 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 02:06:40,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:06:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 348089518, now seen corresponding path program 60 times [2023-08-24 02:06:40,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:06:40,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294256105] [2023-08-24 02:06:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:06:40,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:06:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:06:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:41,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:06:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294256105] [2023-08-24 02:06:41,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294256105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:06:41,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647819699] [2023-08-24 02:06:41,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:06:41,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:06:41,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:06:41,103 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 02:06:41,105 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 02:06:41,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:06:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:06:41,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:06:41,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:06:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:06:41,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:41,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-08-24 02:06:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:41,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:06:42,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:42,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-08-24 02:06:42,854 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:06:42,854 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-24 02:06:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:43,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647819699] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:06:43,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:06:43,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 02:06:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398662258] [2023-08-24 02:06:43,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:06:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:06:43,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:06:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:06:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 02:06:43,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:06:43,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 1617 transitions, 42989 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:43,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:06:43,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:06:43,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:06:49,070 INFO L124 PetriNetUnfolderBase]: 3856/6686 cut-off events. [2023-08-24 02:06:49,070 INFO L125 PetriNetUnfolderBase]: For 697390/697390 co-relation queries the response was YES. [2023-08-24 02:06:49,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99316 conditions, 6686 events. 3856/6686 cut-off events. For 697390/697390 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 46212 event pairs, 433 based on Foata normal form. 2/6644 useless extension candidates. Maximal degree in co-relation 99033. Up to 6316 conditions per place. [2023-08-24 02:06:49,211 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1488 selfloop transitions, 203 changer transitions 6/1697 dead transitions. [2023-08-24 02:06:49,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 897 places, 1697 transitions, 48697 flow [2023-08-24 02:06:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 02:06:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 02:06:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2217 transitions. [2023-08-24 02:06:49,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26563623292595256 [2023-08-24 02:06:49,213 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2217 transitions. [2023-08-24 02:06:49,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2217 transitions. [2023-08-24 02:06:49,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:06:49,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2217 transitions. [2023-08-24 02:06:49,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 56.84615384615385) internal successors, (2217), 39 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:49,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:49,218 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:49,218 INFO L175 Difference]: Start difference. First operand has 859 places, 1617 transitions, 42989 flow. Second operand 39 states and 2217 transitions. [2023-08-24 02:06:49,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 897 places, 1697 transitions, 48697 flow [2023-08-24 02:06:53,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 1697 transitions, 47676 flow, removed 354 selfloop flow, removed 21 redundant places. [2023-08-24 02:06:53,447 INFO L231 Difference]: Finished difference. Result has 884 places, 1642 transitions, 43862 flow [2023-08-24 02:06:53,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=41968, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=43862, PETRI_PLACES=884, PETRI_TRANSITIONS=1642} [2023-08-24 02:06:53,449 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 863 predicate places. [2023-08-24 02:06:53,449 INFO L495 AbstractCegarLoop]: Abstraction has has 884 places, 1642 transitions, 43862 flow [2023-08-24 02:06:53,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:53,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:06:53,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:06:53,456 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 02:06:53,656 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,SelfDestructingSolverStorable64 [2023-08-24 02:06:53,656 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 02:06:53,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:06:53,656 INFO L85 PathProgramCache]: Analyzing trace with hash 73766198, now seen corresponding path program 61 times [2023-08-24 02:06:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:06:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341510478] [2023-08-24 02:06:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:06:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:06:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:06:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:06:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:06:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341510478] [2023-08-24 02:06:54,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341510478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:06:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558328616] [2023-08-24 02:06:54,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:06:54,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:06:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:06:54,524 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 02:06:54,525 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 02:06:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:06:54,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:06:54,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:06:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:06:54,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:06:55,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:06:55,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:06:55,410 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:06:55,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:06:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:06:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558328616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:06:55,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:06:55,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 02:06:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534064470] [2023-08-24 02:06:55,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:06:55,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:06:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:06:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:06:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 02:06:55,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:06:55,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 884 places, 1642 transitions, 43862 flow. Second operand has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:06:55,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:06:55,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:06:55,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:07:01,248 INFO L124 PetriNetUnfolderBase]: 4005/6922 cut-off events. [2023-08-24 02:07:01,249 INFO L125 PetriNetUnfolderBase]: For 766440/766440 co-relation queries the response was YES. [2023-08-24 02:07:01,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106888 conditions, 6922 events. 4005/6922 cut-off events. For 766440/766440 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 47851 event pairs, 534 based on Foata normal form. 3/6881 useless extension candidates. Maximal degree in co-relation 106596. Up to 6298 conditions per place. [2023-08-24 02:07:01,525 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1470 selfloop transitions, 268 changer transitions 5/1743 dead transitions. [2023-08-24 02:07:01,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 914 places, 1743 transitions, 52339 flow [2023-08-24 02:07:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 02:07:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 02:07:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1783 transitions. [2023-08-24 02:07:01,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26876695809466383 [2023-08-24 02:07:01,527 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1783 transitions. [2023-08-24 02:07:01,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1783 transitions. [2023-08-24 02:07:01,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:07:01,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1783 transitions. [2023-08-24 02:07:01,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.516129032258064) internal successors, (1783), 31 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:01,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:01,531 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:01,531 INFO L175 Difference]: Start difference. First operand has 884 places, 1642 transitions, 43862 flow. Second operand 31 states and 1783 transitions. [2023-08-24 02:07:01,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 914 places, 1743 transitions, 52339 flow [2023-08-24 02:07:07,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 895 places, 1743 transitions, 51383 flow, removed 427 selfloop flow, removed 19 redundant places. [2023-08-24 02:07:07,596 INFO L231 Difference]: Finished difference. Result has 903 places, 1698 transitions, 48241 flow [2023-08-24 02:07:07,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=42906, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=48241, PETRI_PLACES=903, PETRI_TRANSITIONS=1698} [2023-08-24 02:07:07,597 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 882 predicate places. [2023-08-24 02:07:07,597 INFO L495 AbstractCegarLoop]: Abstraction has has 903 places, 1698 transitions, 48241 flow [2023-08-24 02:07:07,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:07,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:07:07,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:07:07,602 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 02:07:07,798 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,SelfDestructingSolverStorable65 [2023-08-24 02:07:07,798 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 02:07:07,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:07:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 115778614, now seen corresponding path program 62 times [2023-08-24 02:07:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:07:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343752951] [2023-08-24 02:07:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:07:07,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:07:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:07:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:08,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:07:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343752951] [2023-08-24 02:07:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343752951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:07:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117733459] [2023-08-24 02:07:08,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:07:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:07:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:07:08,791 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 02:07:08,792 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 02:07:08,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:07:08,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:07:08,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:07:08,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:07:09,324 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:07:09,325 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 15 treesize of output 14 [2023-08-24 02:07:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:09,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:07:09,832 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:07:09,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 02:07:10,534 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:07:10,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 02:07:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117733459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:07:10,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:07:10,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 02:07:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414704211] [2023-08-24 02:07:10,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:07:10,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:07:10,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:07:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:07:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 02:07:10,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:07:10,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 903 places, 1698 transitions, 48241 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:10,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:07:10,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:07:10,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:07:17,572 INFO L124 PetriNetUnfolderBase]: 4079/7055 cut-off events. [2023-08-24 02:07:17,572 INFO L125 PetriNetUnfolderBase]: For 801254/801254 co-relation queries the response was YES. [2023-08-24 02:07:17,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110793 conditions, 7055 events. 4079/7055 cut-off events. For 801254/801254 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 49042 event pairs, 556 based on Foata normal form. 2/7013 useless extension candidates. Maximal degree in co-relation 110492. Up to 6373 conditions per place. [2023-08-24 02:07:17,837 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1456 selfloop transitions, 338 changer transitions 6/1800 dead transitions. [2023-08-24 02:07:17,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 943 places, 1800 transitions, 55149 flow [2023-08-24 02:07:17,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 02:07:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 02:07:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2333 transitions. [2023-08-24 02:07:17,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2658992477775245 [2023-08-24 02:07:17,839 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2333 transitions. [2023-08-24 02:07:17,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2333 transitions. [2023-08-24 02:07:17,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:07:17,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2333 transitions. [2023-08-24 02:07:17,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 56.90243902439025) internal successors, (2333), 41 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:17,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 214.0) internal successors, (8988), 42 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:17,844 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 214.0) internal successors, (8988), 42 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:17,845 INFO L175 Difference]: Start difference. First operand has 903 places, 1698 transitions, 48241 flow. Second operand 41 states and 2333 transitions. [2023-08-24 02:07:17,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 943 places, 1800 transitions, 55149 flow [2023-08-24 02:07:23,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 926 places, 1800 transitions, 51255 flow, removed 1891 selfloop flow, removed 17 redundant places. [2023-08-24 02:07:23,916 INFO L231 Difference]: Finished difference. Result has 931 places, 1745 transitions, 48008 flow [2023-08-24 02:07:23,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=44363, PETRI_DIFFERENCE_MINUEND_PLACES=886, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=48008, PETRI_PLACES=931, PETRI_TRANSITIONS=1745} [2023-08-24 02:07:23,917 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 910 predicate places. [2023-08-24 02:07:23,917 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 1745 transitions, 48008 flow [2023-08-24 02:07:23,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:23,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:07:23,918 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:07:23,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-08-24 02:07:24,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:07:24,119 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 02:07:24,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:07:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash -758873034, now seen corresponding path program 63 times [2023-08-24 02:07:24,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:07:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031484689] [2023-08-24 02:07:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:07:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:07:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:07:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:24,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:07:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031484689] [2023-08-24 02:07:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031484689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:07:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837862372] [2023-08-24 02:07:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:07:24,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:07:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:07:24,893 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 02:07:24,895 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 02:07:25,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:07:25,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:07:25,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-08-24 02:07:25,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:07:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:07:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:07:25,550 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:07:25,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-08-24 02:07:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:25,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:07:26,268 INFO L322 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-08-24 02:07:26,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 85 [2023-08-24 02:07:26,445 INFO L322 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2023-08-24 02:07:26,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 60 [2023-08-24 02:07:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:26,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837862372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:07:26,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:07:26,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 02:07:26,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866482586] [2023-08-24 02:07:26,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:07:26,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 02:07:26,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:07:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 02:07:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 02:07:26,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:07:26,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 1745 transitions, 48008 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:26,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:07:26,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:07:26,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:07:37,352 INFO L124 PetriNetUnfolderBase]: 4179/7246 cut-off events. [2023-08-24 02:07:37,352 INFO L125 PetriNetUnfolderBase]: For 794792/794792 co-relation queries the response was YES. [2023-08-24 02:07:37,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109698 conditions, 7246 events. 4179/7246 cut-off events. For 794792/794792 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 50848 event pairs, 562 based on Foata normal form. 2/7188 useless extension candidates. Maximal degree in co-relation 109393. Up to 6816 conditions per place. [2023-08-24 02:07:37,527 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1649 selfloop transitions, 230 changer transitions 7/1886 dead transitions. [2023-08-24 02:07:37,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 1886 transitions, 55227 flow [2023-08-24 02:07:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-24 02:07:37,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-24 02:07:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3301 transitions. [2023-08-24 02:07:37,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2659523042217209 [2023-08-24 02:07:37,530 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3301 transitions. [2023-08-24 02:07:37,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3301 transitions. [2023-08-24 02:07:37,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:07:37,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3301 transitions. [2023-08-24 02:07:37,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 56.91379310344828) internal successors, (3301), 58 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:37,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 214.0) internal successors, (12626), 59 states have internal predecessors, (12626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:37,541 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 214.0) internal successors, (12626), 59 states have internal predecessors, (12626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:37,541 INFO L175 Difference]: Start difference. First operand has 931 places, 1745 transitions, 48008 flow. Second operand 58 states and 3301 transitions. [2023-08-24 02:07:37,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 1886 transitions, 55227 flow [2023-08-24 02:07:43,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 960 places, 1886 transitions, 54214 flow, removed 424 selfloop flow, removed 28 redundant places. [2023-08-24 02:07:44,011 INFO L231 Difference]: Finished difference. Result has 969 places, 1793 transitions, 50200 flow [2023-08-24 02:07:44,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=46995, PETRI_DIFFERENCE_MINUEND_PLACES=903, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=50200, PETRI_PLACES=969, PETRI_TRANSITIONS=1793} [2023-08-24 02:07:44,012 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 948 predicate places. [2023-08-24 02:07:44,012 INFO L495 AbstractCegarLoop]: Abstraction has has 969 places, 1793 transitions, 50200 flow [2023-08-24 02:07:44,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:44,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:07:44,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:07:44,018 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 02:07:44,213 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,SelfDestructingSolverStorable67 [2023-08-24 02:07:44,213 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 02:07:44,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:07:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1745938548, now seen corresponding path program 64 times [2023-08-24 02:07:44,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:07:44,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687022602] [2023-08-24 02:07:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:07:44,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:07:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:07:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:07:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687022602] [2023-08-24 02:07:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687022602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:07:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827522791] [2023-08-24 02:07:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:07:44,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:07:44,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:07:44,825 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 02:07:44,826 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 02:07:45,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:07:45,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:07:45,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:07:45,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:07:45,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:07:45,339 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 15 treesize of output 14 [2023-08-24 02:07:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:45,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:07:45,860 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:07:45,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 02:07:46,265 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:07:46,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 02:07:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:07:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827522791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:07:46,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:07:46,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-24 02:07:46,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802653745] [2023-08-24 02:07:46,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:07:46,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 02:07:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:07:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 02:07:46,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 02:07:46,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:07:46,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 969 places, 1793 transitions, 50200 flow. Second operand has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:46,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:07:46,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:07:46,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:07:53,408 INFO L124 PetriNetUnfolderBase]: 4231/7336 cut-off events. [2023-08-24 02:07:53,408 INFO L125 PetriNetUnfolderBase]: For 817266/817266 co-relation queries the response was YES. [2023-08-24 02:07:53,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112090 conditions, 7336 events. 4231/7336 cut-off events. For 817266/817266 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 51611 event pairs, 561 based on Foata normal form. 2/7278 useless extension candidates. Maximal degree in co-relation 111776. Up to 6959 conditions per place. [2023-08-24 02:07:53,584 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1706 selfloop transitions, 167 changer transitions 7/1880 dead transitions. [2023-08-24 02:07:53,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1006 places, 1880 transitions, 56271 flow [2023-08-24 02:07:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 02:07:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 02:07:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2514 transitions. [2023-08-24 02:07:53,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30122214234363764 [2023-08-24 02:07:53,586 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2514 transitions. [2023-08-24 02:07:53,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2514 transitions. [2023-08-24 02:07:53,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:07:53,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2514 transitions. [2023-08-24 02:07:53,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 64.46153846153847) internal successors, (2514), 39 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:53,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:53,592 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:53,592 INFO L175 Difference]: Start difference. First operand has 969 places, 1793 transitions, 50200 flow. Second operand 39 states and 2514 transitions. [2023-08-24 02:07:53,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1006 places, 1880 transitions, 56271 flow [2023-08-24 02:07:59,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 1880 transitions, 54063 flow, removed 1004 selfloop flow, removed 32 redundant places. [2023-08-24 02:07:59,363 INFO L231 Difference]: Finished difference. Result has 980 places, 1807 transitions, 49669 flow [2023-08-24 02:07:59,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=47996, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=49669, PETRI_PLACES=980, PETRI_TRANSITIONS=1807} [2023-08-24 02:07:59,365 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 959 predicate places. [2023-08-24 02:07:59,365 INFO L495 AbstractCegarLoop]: Abstraction has has 980 places, 1807 transitions, 49669 flow [2023-08-24 02:07:59,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:07:59,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:07:59,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:07:59,370 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 02:07:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-08-24 02:07:59,566 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 02:07:59,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:07:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1704837100, now seen corresponding path program 65 times [2023-08-24 02:07:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:07:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880462818] [2023-08-24 02:07:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:07:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:07:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:08:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:08:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880462818] [2023-08-24 02:08:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880462818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:08:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883455622] [2023-08-24 02:08:00,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:08:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:08:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:08:00,368 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 02:08:00,370 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 02:08:00,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 02:08:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:08:00,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 02:08:00,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:08:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:08:00,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:08:00,960 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:08:00,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:08:01,077 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:08:01,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:08:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:08:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883455622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:08:01,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:08:01,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-24 02:08:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629193917] [2023-08-24 02:08:01,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:08:01,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 02:08:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:08:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 02:08:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 02:08:01,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:08:01,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 1807 transitions, 49669 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:01,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:08:01,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:08:01,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:08:08,043 INFO L124 PetriNetUnfolderBase]: 4292/7450 cut-off events. [2023-08-24 02:08:08,043 INFO L125 PetriNetUnfolderBase]: For 921432/921432 co-relation queries the response was YES. [2023-08-24 02:08:08,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114646 conditions, 7450 events. 4292/7450 cut-off events. For 921432/921432 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 52643 event pairs, 465 based on Foata normal form. 3/7393 useless extension candidates. Maximal degree in co-relation 114328. Up to 7008 conditions per place. [2023-08-24 02:08:08,219 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1632 selfloop transitions, 232 changer transitions 3/1867 dead transitions. [2023-08-24 02:08:08,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1013 places, 1867 transitions, 55768 flow [2023-08-24 02:08:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 02:08:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 02:08:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1946 transitions. [2023-08-24 02:08:08,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2674546454095657 [2023-08-24 02:08:08,221 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1946 transitions. [2023-08-24 02:08:08,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1946 transitions. [2023-08-24 02:08:08,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:08:08,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1946 transitions. [2023-08-24 02:08:08,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.23529411764706) internal successors, (1946), 34 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:08,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:08,225 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:08,225 INFO L175 Difference]: Start difference. First operand has 980 places, 1807 transitions, 49669 flow. Second operand 34 states and 1946 transitions. [2023-08-24 02:08:08,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1013 places, 1867 transitions, 55768 flow [2023-08-24 02:08:14,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 981 places, 1867 transitions, 54815 flow, removed 383 selfloop flow, removed 32 redundant places. [2023-08-24 02:08:14,834 INFO L231 Difference]: Finished difference. Result has 987 places, 1822 transitions, 50750 flow [2023-08-24 02:08:14,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=48716, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1807, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=50750, PETRI_PLACES=987, PETRI_TRANSITIONS=1822} [2023-08-24 02:08:14,835 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 966 predicate places. [2023-08-24 02:08:14,835 INFO L495 AbstractCegarLoop]: Abstraction has has 987 places, 1822 transitions, 50750 flow [2023-08-24 02:08:14,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 states have internal predecessors, (1803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:14,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:08:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:08:14,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-08-24 02:08:15,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-24 02:08:15,036 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 02:08:15,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:08:15,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1746849516, now seen corresponding path program 66 times [2023-08-24 02:08:15,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:08:15,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380227793] [2023-08-24 02:08:15,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:08:15,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:08:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:08:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:15,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:08:15,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380227793] [2023-08-24 02:08:15,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380227793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:08:15,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437095873] [2023-08-24 02:08:15,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:08:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:08:15,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:08:15,742 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 02:08:15,744 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 02:08:16,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:08:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:08:16,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-08-24 02:08:16,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:08:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:08:16,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:08:16,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:08:16,330 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:08:16,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 15 [2023-08-24 02:08:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:16,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:08:16,635 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 02:08:16,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 107 [2023-08-24 02:08:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:17,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437095873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:08:17,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:08:17,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2023-08-24 02:08:17,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721135494] [2023-08-24 02:08:17,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:08:17,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 02:08:17,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:08:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 02:08:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1420, Unknown=0, NotChecked=0, Total=1640 [2023-08-24 02:08:17,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:08:17,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 1822 transitions, 50750 flow. Second operand has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:17,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:08:17,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:08:17,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:08:26,590 INFO L124 PetriNetUnfolderBase]: 4639/7985 cut-off events. [2023-08-24 02:08:26,590 INFO L125 PetriNetUnfolderBase]: For 1074042/1074042 co-relation queries the response was YES. [2023-08-24 02:08:26,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129790 conditions, 7985 events. 4639/7985 cut-off events. For 1074042/1074042 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 56662 event pairs, 484 based on Foata normal form. 2/7921 useless extension candidates. Maximal degree in co-relation 129465. Up to 7234 conditions per place. [2023-08-24 02:08:26,803 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1678 selfloop transitions, 374 changer transitions 8/2060 dead transitions. [2023-08-24 02:08:26,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1050 places, 2060 transitions, 65775 flow [2023-08-24 02:08:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-24 02:08:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-24 02:08:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3637 transitions. [2023-08-24 02:08:26,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2655519859813084 [2023-08-24 02:08:26,807 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3637 transitions. [2023-08-24 02:08:26,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3637 transitions. [2023-08-24 02:08:26,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:08:26,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3637 transitions. [2023-08-24 02:08:26,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.828125) internal successors, (3637), 64 states have internal predecessors, (3637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:26,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 214.0) internal successors, (13910), 65 states have internal predecessors, (13910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:26,822 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 214.0) internal successors, (13910), 65 states have internal predecessors, (13910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:26,822 INFO L175 Difference]: Start difference. First operand has 987 places, 1822 transitions, 50750 flow. Second operand 64 states and 3637 transitions. [2023-08-24 02:08:26,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1050 places, 2060 transitions, 65775 flow [2023-08-24 02:08:33,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1025 places, 2060 transitions, 64481 flow, removed 540 selfloop flow, removed 25 redundant places. [2023-08-24 02:08:33,700 INFO L231 Difference]: Finished difference. Result has 1038 places, 1977 transitions, 60505 flow [2023-08-24 02:08:33,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=49569, PETRI_DIFFERENCE_MINUEND_PLACES=962, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=60505, PETRI_PLACES=1038, PETRI_TRANSITIONS=1977} [2023-08-24 02:08:33,702 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1017 predicate places. [2023-08-24 02:08:33,702 INFO L495 AbstractCegarLoop]: Abstraction has has 1038 places, 1977 transitions, 60505 flow [2023-08-24 02:08:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.41463414634146) internal successors, (2231), 41 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:33,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:08:33,702 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:08:33,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-08-24 02:08:33,904 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,SelfDestructingSolverStorable70 [2023-08-24 02:08:33,904 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 02:08:33,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:08:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -427937842, now seen corresponding path program 67 times [2023-08-24 02:08:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:08:33,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238830754] [2023-08-24 02:08:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:08:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:08:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:08:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:08:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238830754] [2023-08-24 02:08:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238830754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:08:34,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200048960] [2023-08-24 02:08:34,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:08:34,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:08:34,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:08:34,623 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 02:08:34,624 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 02:08:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:08:34,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:08:34,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:08:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:08:35,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:08:35,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:08:35,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:08:35,363 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:08:35,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:08:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:08:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200048960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:08:35,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:08:35,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 32 [2023-08-24 02:08:35,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163869716] [2023-08-24 02:08:35,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:08:35,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 02:08:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:08:35,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 02:08:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 02:08:35,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:08:35,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 1977 transitions, 60505 flow. Second operand has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:35,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:08:35,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:08:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:08:43,043 INFO L124 PetriNetUnfolderBase]: 4783/8230 cut-off events. [2023-08-24 02:08:43,043 INFO L125 PetriNetUnfolderBase]: For 1161584/1161584 co-relation queries the response was YES. [2023-08-24 02:08:43,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137893 conditions, 8230 events. 4783/8230 cut-off events. For 1161584/1161584 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 58758 event pairs, 564 based on Foata normal form. 2/8178 useless extension candidates. Maximal degree in co-relation 137554. Up to 7451 conditions per place. [2023-08-24 02:08:43,389 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 1806 selfloop transitions, 286 changer transitions 4/2096 dead transitions. [2023-08-24 02:08:43,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1067 places, 2096 transitions, 69972 flow [2023-08-24 02:08:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 02:08:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 02:08:43,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1946 transitions. [2023-08-24 02:08:43,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3031152647975078 [2023-08-24 02:08:43,391 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1946 transitions. [2023-08-24 02:08:43,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1946 transitions. [2023-08-24 02:08:43,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:08:43,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1946 transitions. [2023-08-24 02:08:43,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.86666666666666) internal successors, (1946), 30 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:43,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:43,396 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:43,396 INFO L175 Difference]: Start difference. First operand has 1038 places, 1977 transitions, 60505 flow. Second operand 30 states and 1946 transitions. [2023-08-24 02:08:43,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1067 places, 2096 transitions, 69972 flow [2023-08-24 02:08:52,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1037 places, 2096 transitions, 60910 flow, removed 4447 selfloop flow, removed 30 redundant places. [2023-08-24 02:08:53,036 INFO L231 Difference]: Finished difference. Result has 1043 places, 2021 transitions, 56129 flow [2023-08-24 02:08:53,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=52811, PETRI_DIFFERENCE_MINUEND_PLACES=1008, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=56129, PETRI_PLACES=1043, PETRI_TRANSITIONS=2021} [2023-08-24 02:08:53,038 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1022 predicate places. [2023-08-24 02:08:53,038 INFO L495 AbstractCegarLoop]: Abstraction has has 1043 places, 2021 transitions, 56129 flow [2023-08-24 02:08:53,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.64705882352941) internal successors, (2096), 34 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:53,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:08:53,038 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:08:53,047 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 02:08:53,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:08:53,245 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 02:08:53,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:08:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1189195542, now seen corresponding path program 68 times [2023-08-24 02:08:53,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:08:53,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496988442] [2023-08-24 02:08:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:08:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:08:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:08:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:54,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:08:54,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496988442] [2023-08-24 02:08:54,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496988442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:08:54,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203280511] [2023-08-24 02:08:54,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:08:54,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:08:54,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:08:54,076 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 02:08:54,078 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 02:08:54,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:08:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:08:54,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:08:54,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:08:54,602 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:08:54,603 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 15 treesize of output 14 [2023-08-24 02:08:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:54,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:08:55,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:08:55,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-08-24 02:08:55,531 INFO L322 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-24 02:08:55,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-08-24 02:08:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:08:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203280511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:08:55,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:08:55,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 02:08:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061915216] [2023-08-24 02:08:55,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:08:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:08:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:08:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:08:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 02:08:55,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:08:55,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1043 places, 2021 transitions, 56129 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:08:55,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:08:55,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:08:55,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:09:04,250 INFO L124 PetriNetUnfolderBase]: 4847/8342 cut-off events. [2023-08-24 02:09:04,250 INFO L125 PetriNetUnfolderBase]: For 1112590/1112590 co-relation queries the response was YES. [2023-08-24 02:09:04,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130586 conditions, 8342 events. 4847/8342 cut-off events. For 1112590/1112590 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 59656 event pairs, 599 based on Foata normal form. 2/8292 useless extension candidates. Maximal degree in co-relation 130242. Up to 7919 conditions per place. [2023-08-24 02:09:04,460 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1842 selfloop transitions, 250 changer transitions 6/2098 dead transitions. [2023-08-24 02:09:04,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1080 places, 2098 transitions, 63339 flow [2023-08-24 02:09:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 02:09:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 02:09:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2154 transitions. [2023-08-24 02:09:04,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.264879488440728 [2023-08-24 02:09:04,463 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2154 transitions. [2023-08-24 02:09:04,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2154 transitions. [2023-08-24 02:09:04,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:09:04,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2154 transitions. [2023-08-24 02:09:04,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 56.68421052631579) internal successors, (2154), 38 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:04,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 214.0) internal successors, (8346), 39 states have internal predecessors, (8346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:04,468 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 214.0) internal successors, (8346), 39 states have internal predecessors, (8346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:04,468 INFO L175 Difference]: Start difference. First operand has 1043 places, 2021 transitions, 56129 flow. Second operand 38 states and 2154 transitions. [2023-08-24 02:09:04,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1080 places, 2098 transitions, 63339 flow [2023-08-24 02:09:12,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1060 places, 2098 transitions, 61963 flow, removed 573 selfloop flow, removed 20 redundant places. [2023-08-24 02:09:12,276 INFO L231 Difference]: Finished difference. Result has 1065 places, 2055 transitions, 57777 flow [2023-08-24 02:09:12,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=54754, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=57777, PETRI_PLACES=1065, PETRI_TRANSITIONS=2055} [2023-08-24 02:09:12,278 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1044 predicate places. [2023-08-24 02:09:12,278 INFO L495 AbstractCegarLoop]: Abstraction has has 1065 places, 2055 transitions, 57777 flow [2023-08-24 02:09:12,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:12,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:09:12,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:09:12,287 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 02:09:12,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:09:12,485 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 02:09:12,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:09:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1418163510, now seen corresponding path program 69 times [2023-08-24 02:09:12,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:09:12,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472851380] [2023-08-24 02:09:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:09:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:09:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:09:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:09:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:09:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472851380] [2023-08-24 02:09:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472851380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:09:13,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413666109] [2023-08-24 02:09:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:09:13,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:09:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:09:13,424 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 02:09:13,425 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 02:09:13,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 02:09:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:09:13,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-24 02:09:13,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:09:13,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-24 02:09:13,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:09:13,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:09:14,159 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:09:14,159 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 17 treesize of output 14 [2023-08-24 02:09:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:09:14,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:09:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:09:14,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413666109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:09:14,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:09:14,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 37 [2023-08-24 02:09:14,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144230646] [2023-08-24 02:09:14,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:09:14,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:09:14,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:09:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:09:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 02:09:14,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:09:14,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1065 places, 2055 transitions, 57777 flow. Second operand has 39 states, 39 states have (on average 54.64102564102564) internal successors, (2131), 39 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:14,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:09:14,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:09:14,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:09:24,356 INFO L124 PetriNetUnfolderBase]: 4952/8528 cut-off events. [2023-08-24 02:09:24,356 INFO L125 PetriNetUnfolderBase]: For 1148176/1148176 co-relation queries the response was YES. [2023-08-24 02:09:24,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135742 conditions, 8528 events. 4952/8528 cut-off events. For 1148176/1148176 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 61377 event pairs, 610 based on Foata normal form. 2/8478 useless extension candidates. Maximal degree in co-relation 135394. Up to 7992 conditions per place. [2023-08-24 02:09:24,626 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1863 selfloop transitions, 297 changer transitions 7/2167 dead transitions. [2023-08-24 02:09:24,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 2167 transitions, 67027 flow [2023-08-24 02:09:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 02:09:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 02:09:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2280 transitions. [2023-08-24 02:09:24,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26635514018691586 [2023-08-24 02:09:24,628 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2280 transitions. [2023-08-24 02:09:24,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2280 transitions. [2023-08-24 02:09:24,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:09:24,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2280 transitions. [2023-08-24 02:09:24,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.0) internal successors, (2280), 40 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:24,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:24,633 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:24,633 INFO L175 Difference]: Start difference. First operand has 1065 places, 2055 transitions, 57777 flow. Second operand 40 states and 2280 transitions. [2023-08-24 02:09:24,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 2167 transitions, 67027 flow [2023-08-24 02:09:33,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1076 places, 2167 transitions, 65756 flow, removed 534 selfloop flow, removed 28 redundant places. [2023-08-24 02:09:33,558 INFO L231 Difference]: Finished difference. Result has 1083 places, 2110 transitions, 61073 flow [2023-08-24 02:09:33,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=56520, PETRI_DIFFERENCE_MINUEND_PLACES=1037, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=61073, PETRI_PLACES=1083, PETRI_TRANSITIONS=2110} [2023-08-24 02:09:33,561 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1062 predicate places. [2023-08-24 02:09:33,561 INFO L495 AbstractCegarLoop]: Abstraction has has 1083 places, 2110 transitions, 61073 flow [2023-08-24 02:09:33,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.64102564102564) internal successors, (2131), 39 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:33,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:09:33,561 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:09:33,570 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 02:09:33,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:09:33,768 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 02:09:33,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:09:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash 902152684, now seen corresponding path program 70 times [2023-08-24 02:09:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:09:33,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548414651] [2023-08-24 02:09:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:09:33,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:09:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:09:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:09:34,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:09:34,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548414651] [2023-08-24 02:09:34,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548414651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:09:34,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614616766] [2023-08-24 02:09:34,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:09:34,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:09:34,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:09:34,635 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 02:09:34,636 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 02:09:34,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:09:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:09:34,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:09:34,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:09:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:09:35,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:09:35,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:09:35,314 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:09:35,447 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:09:35,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:09:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:09:35,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614616766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:09:35,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:09:35,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 02:09:35,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51810732] [2023-08-24 02:09:35,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:09:35,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:09:35,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:09:35,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:09:35,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 02:09:35,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:09:35,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1083 places, 2110 transitions, 61073 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:35,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:09:35,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:09:35,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:09:44,478 INFO L124 PetriNetUnfolderBase]: 5129/8813 cut-off events. [2023-08-24 02:09:44,479 INFO L125 PetriNetUnfolderBase]: For 1321127/1321127 co-relation queries the response was YES. [2023-08-24 02:09:44,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148246 conditions, 8813 events. 5129/8813 cut-off events. For 1321127/1321127 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 63331 event pairs, 495 based on Foata normal form. 3/8764 useless extension candidates. Maximal degree in co-relation 147891. Up to 8235 conditions per place. [2023-08-24 02:09:44,706 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1945 selfloop transitions, 301 changer transitions 3/2249 dead transitions. [2023-08-24 02:09:44,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1121 places, 2249 transitions, 73281 flow [2023-08-24 02:09:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 02:09:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 02:09:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2306 transitions. [2023-08-24 02:09:44,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.269392523364486 [2023-08-24 02:09:44,708 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2306 transitions. [2023-08-24 02:09:44,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2306 transitions. [2023-08-24 02:09:44,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:09:44,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2306 transitions. [2023-08-24 02:09:44,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.65) internal successors, (2306), 40 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:44,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:44,714 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:44,714 INFO L175 Difference]: Start difference. First operand has 1083 places, 2110 transitions, 61073 flow. Second operand 40 states and 2306 transitions. [2023-08-24 02:09:44,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1121 places, 2249 transitions, 73281 flow [2023-08-24 02:09:53,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1099 places, 2249 transitions, 71668 flow, removed 721 selfloop flow, removed 22 redundant places. [2023-08-24 02:09:53,921 INFO L231 Difference]: Finished difference. Result has 1110 places, 2183 transitions, 66902 flow [2023-08-24 02:09:53,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=59528, PETRI_DIFFERENCE_MINUEND_PLACES=1060, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1844, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=66902, PETRI_PLACES=1110, PETRI_TRANSITIONS=2183} [2023-08-24 02:09:53,923 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1089 predicate places. [2023-08-24 02:09:53,924 INFO L495 AbstractCegarLoop]: Abstraction has has 1110 places, 2183 transitions, 66902 flow [2023-08-24 02:09:53,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:53,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:09:53,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:09:53,933 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 02:09:54,130 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,SelfDestructingSolverStorable74 [2023-08-24 02:09:54,130 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 02:09:54,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:09:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash 430692212, now seen corresponding path program 71 times [2023-08-24 02:09:54,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:09:54,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142812394] [2023-08-24 02:09:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:09:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:09:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:09:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:09:54,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:09:54,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142812394] [2023-08-24 02:09:54,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142812394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:09:54,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364143501] [2023-08-24 02:09:54,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:09:54,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:09:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:09:54,985 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 02:09:54,987 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 02:09:55,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:09:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:09:55,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:09:55,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:09:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:09:55,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:09:55,628 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:09:55,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:09:55,814 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:09:55,815 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:09:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:09:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364143501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:09:55,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:09:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 02:09:55,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255971843] [2023-08-24 02:09:55,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:09:55,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:09:55,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:09:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:09:55,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 02:09:55,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:09:55,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1110 places, 2183 transitions, 66902 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:09:55,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:09:55,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:09:55,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:10:05,054 INFO L124 PetriNetUnfolderBase]: 5280/9051 cut-off events. [2023-08-24 02:10:05,054 INFO L125 PetriNetUnfolderBase]: For 1460640/1460640 co-relation queries the response was YES. [2023-08-24 02:10:05,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154675 conditions, 9051 events. 5280/9051 cut-off events. For 1460640/1460640 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 65167 event pairs, 635 based on Foata normal form. 2/8999 useless extension candidates. Maximal degree in co-relation 154310. Up to 8318 conditions per place. [2023-08-24 02:10:05,300 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1928 selfloop transitions, 355 changer transitions 8/2291 dead transitions. [2023-08-24 02:10:05,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1144 places, 2291 transitions, 75546 flow [2023-08-24 02:10:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 02:10:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 02:10:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2004 transitions. [2023-08-24 02:10:05,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26755674232309745 [2023-08-24 02:10:05,302 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2004 transitions. [2023-08-24 02:10:05,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2004 transitions. [2023-08-24 02:10:05,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:10:05,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2004 transitions. [2023-08-24 02:10:05,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.25714285714286) internal successors, (2004), 35 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 02:10:05,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 214.0) internal successors, (7704), 36 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:05,307 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 214.0) internal successors, (7704), 36 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:05,307 INFO L175 Difference]: Start difference. First operand has 1110 places, 2183 transitions, 66902 flow. Second operand 35 states and 2004 transitions. [2023-08-24 02:10:05,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1144 places, 2291 transitions, 75546 flow [2023-08-24 02:10:16,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1125 places, 2291 transitions, 71088 flow, removed 2162 selfloop flow, removed 19 redundant places. [2023-08-24 02:10:16,498 INFO L231 Difference]: Finished difference. Result has 1132 places, 2232 transitions, 66406 flow [2023-08-24 02:10:16,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=62452, PETRI_DIFFERENCE_MINUEND_PLACES=1091, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=66406, PETRI_PLACES=1132, PETRI_TRANSITIONS=2232} [2023-08-24 02:10:16,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1111 predicate places. [2023-08-24 02:10:16,500 INFO L495 AbstractCegarLoop]: Abstraction has has 1132 places, 2232 transitions, 66406 flow [2023-08-24 02:10:16,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:16,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:10:16,501 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:10:16,509 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 02:10:16,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:10:16,707 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 02:10:16,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:10:16,707 INFO L85 PathProgramCache]: Analyzing trace with hash -371992204, now seen corresponding path program 72 times [2023-08-24 02:10:16,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:10:16,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301895592] [2023-08-24 02:10:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:10:16,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:10:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:10:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:10:17,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:10:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301895592] [2023-08-24 02:10:17,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301895592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:10:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781352351] [2023-08-24 02:10:17,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:10:17,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:10:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:10:17,468 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 02:10:17,470 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 02:10:17,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:10:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:10:17,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 02:10:17,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:10:17,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:10:17,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:10:17,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:10:18,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:18,213 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 15 treesize of output 14 [2023-08-24 02:10:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:10:18,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:10:18,994 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_subst_56 Int) (v_ArrVal_2742 (Array Int Int))) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2742) c_~A~0.base))) (< (select .cse0 (+ c_~A~0.offset (* v_subst_56 4))) (+ (select .cse0 .cse1) c_~counter~0 1))) (< (+ v_subst_56 1) c_~N~0) (<= c_~N~0 v_subst_56))) (forall ((v_ArrVal_2742 (Array Int Int)) (v_subst_55 Int)) (or (< (+ v_subst_55 1) c_~N~0) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2742) c_~A~0.base))) (<= (+ (select .cse2 .cse1) c_~counter~0) (select .cse2 (+ c_~A~0.offset (* v_subst_55 4))))) (<= c_~N~0 v_subst_55))))) is different from false [2023-08-24 02:10:19,102 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:19,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-08-24 02:10:19,109 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:19,109 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 198 treesize of output 178 [2023-08-24 02:10:19,119 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:19,119 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 35 treesize of output 34 [2023-08-24 02:10:19,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:19,127 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 44 treesize of output 33 [2023-08-24 02:10:19,189 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:19,189 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-08-24 02:10:19,200 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:10:19,200 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 98 treesize of output 88 [2023-08-24 02:10:19,211 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:10:19,212 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 83 treesize of output 67 [2023-08-24 02:10:19,229 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:10:19,230 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 35 treesize of output 30 [2023-08-24 02:10:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:10:19,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781352351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:10:19,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:10:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 02:10:19,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106029292] [2023-08-24 02:10:19,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:10:19,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 02:10:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:10:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 02:10:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1661, Unknown=1, NotChecked=84, Total=1980 [2023-08-24 02:10:19,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:10:19,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1132 places, 2232 transitions, 66406 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:19,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:10:19,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:10:19,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:10:29,657 INFO L124 PetriNetUnfolderBase]: 5346/9167 cut-off events. [2023-08-24 02:10:29,657 INFO L125 PetriNetUnfolderBase]: For 1462573/1462573 co-relation queries the response was YES. [2023-08-24 02:10:29,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153525 conditions, 9167 events. 5346/9167 cut-off events. For 1462573/1462573 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 66199 event pairs, 519 based on Foata normal form. 2/9117 useless extension candidates. Maximal degree in co-relation 153152. Up to 8685 conditions per place. [2023-08-24 02:10:29,915 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2028 selfloop transitions, 286 changer transitions 7/2321 dead transitions. [2023-08-24 02:10:29,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1174 places, 2321 transitions, 74077 flow [2023-08-24 02:10:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 02:10:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 02:10:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2458 transitions. [2023-08-24 02:10:29,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26711584438165614 [2023-08-24 02:10:29,917 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2458 transitions. [2023-08-24 02:10:29,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2458 transitions. [2023-08-24 02:10:29,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:10:29,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2458 transitions. [2023-08-24 02:10:29,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 57.16279069767442) internal successors, (2458), 43 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:29,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 214.0) internal successors, (9416), 44 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:29,923 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 214.0) internal successors, (9416), 44 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:29,923 INFO L175 Difference]: Start difference. First operand has 1132 places, 2232 transitions, 66406 flow. Second operand 43 states and 2458 transitions. [2023-08-24 02:10:29,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1174 places, 2321 transitions, 74077 flow [2023-08-24 02:10:41,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1153 places, 2321 transitions, 71178 flow, removed 1318 selfloop flow, removed 21 redundant places. [2023-08-24 02:10:41,308 INFO L231 Difference]: Finished difference. Result has 1160 places, 2257 transitions, 66348 flow [2023-08-24 02:10:41,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=63507, PETRI_DIFFERENCE_MINUEND_PLACES=1111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=66348, PETRI_PLACES=1160, PETRI_TRANSITIONS=2257} [2023-08-24 02:10:41,310 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1139 predicate places. [2023-08-24 02:10:41,310 INFO L495 AbstractCegarLoop]: Abstraction has has 1160 places, 2257 transitions, 66348 flow [2023-08-24 02:10:41,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:41,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:10:41,310 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:10:41,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-08-24 02:10:41,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:10:41,511 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 02:10:41,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:10:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1245732884, now seen corresponding path program 73 times [2023-08-24 02:10:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:10:41,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930840806] [2023-08-24 02:10:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:10:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:10:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:10:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:10:42,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:10:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930840806] [2023-08-24 02:10:42,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930840806] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:10:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418713574] [2023-08-24 02:10:42,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:10:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:10:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:10:42,251 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 02:10:42,252 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 02:10:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:10:42,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:10:42,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:10:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:10:42,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:10:42,906 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:10:42,906 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 02:10:43,034 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 02:10:43,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 02:10:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:10:43,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418713574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:10:43,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:10:43,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 02:10:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694490787] [2023-08-24 02:10:43,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:10:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:10:43,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:10:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:10:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 02:10:43,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:10:43,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1160 places, 2257 transitions, 66348 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:43,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:10:43,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:10:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:10:52,969 INFO L124 PetriNetUnfolderBase]: 5461/9352 cut-off events. [2023-08-24 02:10:52,970 INFO L125 PetriNetUnfolderBase]: For 1569320/1569320 co-relation queries the response was YES. [2023-08-24 02:10:53,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159253 conditions, 9352 events. 5461/9352 cut-off events. For 1569320/1569320 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 67826 event pairs, 521 based on Foata normal form. 3/9303 useless extension candidates. Maximal degree in co-relation 158872. Up to 8790 conditions per place. [2023-08-24 02:10:53,239 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2048 selfloop transitions, 303 changer transitions 5/2356 dead transitions. [2023-08-24 02:10:53,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1198 places, 2356 transitions, 76616 flow [2023-08-24 02:10:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 02:10:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 02:10:53,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2232 transitions. [2023-08-24 02:10:53,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2674335010783609 [2023-08-24 02:10:53,241 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2232 transitions. [2023-08-24 02:10:53,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2232 transitions. [2023-08-24 02:10:53,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:10:53,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2232 transitions. [2023-08-24 02:10:53,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 57.23076923076923) internal successors, (2232), 39 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 02:10:53,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:53,354 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:10:53,354 INFO L175 Difference]: Start difference. First operand has 1160 places, 2257 transitions, 66348 flow. Second operand 39 states and 2232 transitions. [2023-08-24 02:10:53,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1198 places, 2356 transitions, 76616 flow [2023-08-24 02:11:07,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1169 places, 2356 transitions, 75505 flow, removed 464 selfloop flow, removed 29 redundant places. [2023-08-24 02:11:07,795 INFO L231 Difference]: Finished difference. Result has 1177 places, 2303 transitions, 70425 flow [2023-08-24 02:11:07,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=65255, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1975, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=70425, PETRI_PLACES=1177, PETRI_TRANSITIONS=2303} [2023-08-24 02:11:07,798 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1156 predicate places. [2023-08-24 02:11:07,798 INFO L495 AbstractCegarLoop]: Abstraction has has 1177 places, 2303 transitions, 70425 flow [2023-08-24 02:11:07,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:07,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:11:07,798 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:11:07,805 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 02:11:08,005 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,SelfDestructingSolverStorable77 [2023-08-24 02:11:08,005 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 02:11:08,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:11:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 390101934, now seen corresponding path program 74 times [2023-08-24 02:11:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:11:08,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134105610] [2023-08-24 02:11:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:11:08,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:11:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:11:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:11:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:11:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134105610] [2023-08-24 02:11:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134105610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:11:08,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231503373] [2023-08-24 02:11:08,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:11:08,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:11:08,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:11:08,805 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 02:11:08,807 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 02:11:09,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:11:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:11:09,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:11:09,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:11:09,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:11:09,393 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:11:09,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2023-08-24 02:11:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:11:09,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:11:10,257 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:11:10,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-08-24 02:11:10,710 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 02:11:10,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-24 02:11:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:11:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231503373] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:11:11,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:11:11,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 02:11:11,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057209517] [2023-08-24 02:11:11,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:11:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:11:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:11:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:11:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 02:11:11,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:11:11,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1177 places, 2303 transitions, 70425 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:11,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:11:11,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:11:11,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:11:21,862 INFO L124 PetriNetUnfolderBase]: 5554/9527 cut-off events. [2023-08-24 02:11:21,862 INFO L125 PetriNetUnfolderBase]: For 1740702/1740702 co-relation queries the response was YES. [2023-08-24 02:11:22,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166350 conditions, 9527 events. 5554/9527 cut-off events. For 1740702/1740702 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 69252 event pairs, 543 based on Foata normal form. 2/9477 useless extension candidates. Maximal degree in co-relation 165962. Up to 9022 conditions per place. [2023-08-24 02:11:22,133 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 2127 selfloop transitions, 264 changer transitions 6/2397 dead transitions. [2023-08-24 02:11:22,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1219 places, 2397 transitions, 79418 flow [2023-08-24 02:11:22,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 02:11:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 02:11:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2442 transitions. [2023-08-24 02:11:22,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2653770919365355 [2023-08-24 02:11:22,135 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2442 transitions. [2023-08-24 02:11:22,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2442 transitions. [2023-08-24 02:11:22,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:11:22,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2442 transitions. [2023-08-24 02:11:22,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 56.7906976744186) internal successors, (2442), 43 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:22,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 214.0) internal successors, (9416), 44 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:22,141 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 214.0) internal successors, (9416), 44 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:22,141 INFO L175 Difference]: Start difference. First operand has 1177 places, 2303 transitions, 70425 flow. Second operand 43 states and 2442 transitions. [2023-08-24 02:11:22,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1219 places, 2397 transitions, 79418 flow [2023-08-24 02:11:34,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1196 places, 2397 transitions, 75246 flow, removed 1932 selfloop flow, removed 23 redundant places. [2023-08-24 02:11:34,850 INFO L231 Difference]: Finished difference. Result has 1203 places, 2336 transitions, 69551 flow [2023-08-24 02:11:34,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=66337, PETRI_DIFFERENCE_MINUEND_PLACES=1154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2052, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=69551, PETRI_PLACES=1203, PETRI_TRANSITIONS=2336} [2023-08-24 02:11:34,852 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1182 predicate places. [2023-08-24 02:11:34,852 INFO L495 AbstractCegarLoop]: Abstraction has has 1203 places, 2336 transitions, 69551 flow [2023-08-24 02:11:34,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:34,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:11:34,853 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:11:34,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-24 02:11:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-08-24 02:11:35,056 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 02:11:35,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:11:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1231207958, now seen corresponding path program 75 times [2023-08-24 02:11:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:11:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911933010] [2023-08-24 02:11:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:11:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:11:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:11:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:11:35,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:11:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911933010] [2023-08-24 02:11:35,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911933010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:11:35,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134151880] [2023-08-24 02:11:35,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:11:35,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:11:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:11:35,908 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 02:11:35,909 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 02:11:36,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 02:11:36,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:11:36,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-24 02:11:36,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:11:36,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:11:36,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:11:36,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:11:36,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:11:36,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:11:36,778 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:11:36,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 33 [2023-08-24 02:11:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:11:36,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:11:40,251 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_subst_59 Int) (v_ArrVal_2860 (Array Int Int))) (or (< (+ 2 v_subst_59) c_~N~0) (<= c_~N~0 (+ v_subst_59 1)) (forall ((v_subst_62 Int)) (or (<= c_~N~0 v_subst_62) (< (+ v_subst_62 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2860) c_~A~0.base))) (<= (let ((.cse1 (* v_subst_59 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) (select .cse0 (+ c_~A~0.offset 4 .cse1)) c_~counter~0)) (+ (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* v_subst_62 4)))))))))) (forall ((v_ArrVal_2860 (Array Int Int)) (v_subst_60 Int)) (or (< (+ 2 v_subst_60) c_~N~0) (forall ((v_subst_61 Int)) (or (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2860) c_~A~0.base))) (< (+ (select .cse3 .cse2) (select .cse3 (+ c_~A~0.offset (* v_subst_61 4)))) (let ((.cse4 (* v_subst_60 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) c_~counter~0 (select .cse3 (+ c_~A~0.offset .cse4)) 1)))) (<= c_~N~0 v_subst_61) (< (+ v_subst_61 1) c_~N~0))) (<= c_~N~0 (+ v_subst_60 1)))))) is different from false [2023-08-24 02:11:46,450 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:11:46,474 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:11:46,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-08-24 02:11:46,501 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:11:46,501 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 166 treesize of output 155 [2023-08-24 02:11:46,528 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:11:46,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 132 treesize of output 106 [2023-08-24 02:11:46,557 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:11:46,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 50 [2023-08-24 02:11:46,683 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:11:46,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-08-24 02:11:46,708 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:11:46,708 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 334 treesize of output 280 [2023-08-24 02:11:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:11:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:11:46,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:11:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:11:46,722 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-08-24 02:11:46,746 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:11:46,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2023-08-24 02:11:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:11:46,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134151880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:11:46,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:11:46,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-08-24 02:11:46,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99754110] [2023-08-24 02:11:46,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:11:46,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 02:11:46,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:11:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 02:11:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1859, Unknown=1, NotChecked=88, Total=2162 [2023-08-24 02:11:46,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:11:46,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1203 places, 2336 transitions, 69551 flow. Second operand has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:11:46,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:11:46,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:11:46,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:12:00,948 INFO L124 PetriNetUnfolderBase]: 5605/9634 cut-off events. [2023-08-24 02:12:00,948 INFO L125 PetriNetUnfolderBase]: For 1758130/1758130 co-relation queries the response was YES. [2023-08-24 02:12:01,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164917 conditions, 9634 events. 5605/9634 cut-off events. For 1758130/1758130 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 70468 event pairs, 581 based on Foata normal form. 2/9578 useless extension candidates. Maximal degree in co-relation 164522. Up to 9033 conditions per place. [2023-08-24 02:12:01,237 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 2076 selfloop transitions, 352 changer transitions 9/2437 dead transitions. [2023-08-24 02:12:01,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1255 places, 2437 transitions, 77906 flow [2023-08-24 02:12:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 02:12:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 02:12:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2995 transitions. [2023-08-24 02:12:01,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26406277552459884 [2023-08-24 02:12:01,240 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2995 transitions. [2023-08-24 02:12:01,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2995 transitions. [2023-08-24 02:12:01,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:12:01,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2995 transitions. [2023-08-24 02:12:01,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 56.509433962264154) internal successors, (2995), 53 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:01,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 214.0) internal successors, (11556), 54 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:01,247 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 214.0) internal successors, (11556), 54 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:01,247 INFO L175 Difference]: Start difference. First operand has 1203 places, 2336 transitions, 69551 flow. Second operand 53 states and 2995 transitions. [2023-08-24 02:12:01,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1255 places, 2437 transitions, 77906 flow [2023-08-24 02:12:14,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1229 places, 2437 transitions, 76325 flow, removed 700 selfloop flow, removed 26 redundant places. [2023-08-24 02:12:14,274 INFO L231 Difference]: Finished difference. Result has 1240 places, 2375 transitions, 71473 flow [2023-08-24 02:12:14,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=68144, PETRI_DIFFERENCE_MINUEND_PLACES=1177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=71473, PETRI_PLACES=1240, PETRI_TRANSITIONS=2375} [2023-08-24 02:12:14,277 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1219 predicate places. [2023-08-24 02:12:14,277 INFO L495 AbstractCegarLoop]: Abstraction has has 1240 places, 2375 transitions, 71473 flow [2023-08-24 02:12:14,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.297872340425535) internal successors, (2552), 47 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:14,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:12:14,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:12:14,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-24 02:12:14,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:12:14,484 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 02:12:14,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:12:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2096307402, now seen corresponding path program 76 times [2023-08-24 02:12:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:12:14,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894125423] [2023-08-24 02:12:14,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:12:14,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:12:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:12:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:12:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:12:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894125423] [2023-08-24 02:12:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894125423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:12:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214861497] [2023-08-24 02:12:15,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:12:15,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:12:15,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:12:15,068 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 02:12:15,069 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 02:12:15,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:12:15,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:12:15,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 02:12:15,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:12:15,642 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:12:15,643 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 15 treesize of output 14 [2023-08-24 02:12:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:12:15,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:12:16,269 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:12:16,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 110 [2023-08-24 02:12:16,844 INFO L322 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-24 02:12:16,844 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-08-24 02:12:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:12:17,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214861497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:12:17,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:12:17,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-24 02:12:17,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060918059] [2023-08-24 02:12:17,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:12:17,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 02:12:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:12:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 02:12:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 02:12:17,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:12:17,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1240 places, 2375 transitions, 71473 flow. Second operand has 42 states, 42 states have (on average 54.45238095238095) internal successors, (2287), 42 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:17,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:12:17,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:12:17,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:12:28,417 INFO L124 PetriNetUnfolderBase]: 5660/9726 cut-off events. [2023-08-24 02:12:28,418 INFO L125 PetriNetUnfolderBase]: For 1899406/1899406 co-relation queries the response was YES. [2023-08-24 02:12:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169664 conditions, 9726 events. 5660/9726 cut-off events. For 1899406/1899406 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 71237 event pairs, 688 based on Foata normal form. 2/9670 useless extension candidates. Maximal degree in co-relation 169257. Up to 9480 conditions per place. [2023-08-24 02:12:28,697 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 2306 selfloop transitions, 129 changer transitions 3/2438 dead transitions. [2023-08-24 02:12:28,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1272 places, 2438 transitions, 79362 flow [2023-08-24 02:12:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 02:12:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 02:12:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1937 transitions. [2023-08-24 02:12:28,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2662177020340847 [2023-08-24 02:12:28,699 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1937 transitions. [2023-08-24 02:12:28,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1937 transitions. [2023-08-24 02:12:28,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:12:28,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1937 transitions. [2023-08-24 02:12:28,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 56.970588235294116) internal successors, (1937), 34 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:28,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:28,704 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:28,704 INFO L175 Difference]: Start difference. First operand has 1240 places, 2375 transitions, 71473 flow. Second operand 34 states and 1937 transitions. [2023-08-24 02:12:28,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1272 places, 2438 transitions, 79362 flow [2023-08-24 02:12:45,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1233 places, 2438 transitions, 77788 flow, removed 644 selfloop flow, removed 39 redundant places. [2023-08-24 02:12:45,297 INFO L231 Difference]: Finished difference. Result has 1237 places, 2390 transitions, 71781 flow [2023-08-24 02:12:45,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=69899, PETRI_DIFFERENCE_MINUEND_PLACES=1200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=71781, PETRI_PLACES=1237, PETRI_TRANSITIONS=2390} [2023-08-24 02:12:45,299 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1216 predicate places. [2023-08-24 02:12:45,299 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 2390 transitions, 71781 flow [2023-08-24 02:12:45,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.45238095238095) internal successors, (2287), 42 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:45,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:12:45,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:12:45,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-08-24 02:12:45,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:12:45,500 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 02:12:45,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:12:45,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1983112906, now seen corresponding path program 77 times [2023-08-24 02:12:45,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:12:45,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712997277] [2023-08-24 02:12:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:12:45,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:12:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:12:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:12:46,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:12:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712997277] [2023-08-24 02:12:46,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712997277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:12:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14025057] [2023-08-24 02:12:46,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:12:46,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:12:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:12:46,099 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 02:12:46,101 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 02:12:46,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 02:12:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:12:46,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 02:12:46,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:12:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:12:46,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:12:46,744 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:12:46,744 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 02:12:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:12:46,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14025057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:12:46,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:12:46,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-08-24 02:12:46,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511920688] [2023-08-24 02:12:46,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:12:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:12:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:12:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:12:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2023-08-24 02:12:46,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 02:12:46,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1237 places, 2390 transitions, 71781 flow. Second operand has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:46,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:12:46,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 02:12:46,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:12:58,119 INFO L124 PetriNetUnfolderBase]: 5779/9915 cut-off events. [2023-08-24 02:12:58,119 INFO L125 PetriNetUnfolderBase]: For 2021171/2021171 co-relation queries the response was YES. [2023-08-24 02:12:58,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176835 conditions, 9915 events. 5779/9915 cut-off events. For 2021171/2021171 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 72744 event pairs, 669 based on Foata normal form. 2/9859 useless extension candidates. Maximal degree in co-relation 176426. Up to 9411 conditions per place. [2023-08-24 02:12:58,405 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 2185 selfloop transitions, 318 changer transitions 3/2506 dead transitions. [2023-08-24 02:12:58,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1273 places, 2506 transitions, 83179 flow [2023-08-24 02:12:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 02:12:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 02:12:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2376 transitions. [2023-08-24 02:12:58,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3000757767112907 [2023-08-24 02:12:58,407 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2376 transitions. [2023-08-24 02:12:58,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2376 transitions. [2023-08-24 02:12:58,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:12:58,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2376 transitions. [2023-08-24 02:12:58,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.21621621621621) internal successors, (2376), 37 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:58,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 214.0) internal successors, (8132), 38 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:58,412 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 214.0) internal successors, (8132), 38 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:12:58,412 INFO L175 Difference]: Start difference. First operand has 1237 places, 2390 transitions, 71781 flow. Second operand 37 states and 2376 transitions. [2023-08-24 02:12:58,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1273 places, 2506 transitions, 83179 flow [2023-08-24 02:13:15,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1242 places, 2506 transitions, 81657 flow, removed 622 selfloop flow, removed 31 redundant places. [2023-08-24 02:13:15,698 INFO L231 Difference]: Finished difference. Result has 1250 places, 2456 transitions, 76792 flow [2023-08-24 02:13:15,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=70586, PETRI_DIFFERENCE_MINUEND_PLACES=1206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2093, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=76792, PETRI_PLACES=1250, PETRI_TRANSITIONS=2456} [2023-08-24 02:13:15,700 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1229 predicate places. [2023-08-24 02:13:15,700 INFO L495 AbstractCegarLoop]: Abstraction has has 1250 places, 2456 transitions, 76792 flow [2023-08-24 02:13:15,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.84375) internal successors, (1979), 32 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:13:15,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:13:15,700 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:13:15,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-08-24 02:13:15,900 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,SelfDestructingSolverStorable81 [2023-08-24 02:13:15,901 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 02:13:15,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:13:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 480597228, now seen corresponding path program 78 times [2023-08-24 02:13:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:13:15,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613584323] [2023-08-24 02:13:15,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:13:15,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:13:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:13:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:13:16,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:13:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613584323] [2023-08-24 02:13:16,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613584323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:13:16,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742893930] [2023-08-24 02:13:16,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:13:16,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:13:16,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:13:16,516 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 02:13:16,517 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 02:13:16,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:13:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:13:16,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-24 02:13:16,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:13:16,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:13:16,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:13:16,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:13:17,209 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:13:17,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 51 [2023-08-24 02:13:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:13:17,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:13:20,760 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_2978 (Array Int Int)) (v_subst_67 Int)) (or (< (+ v_subst_67 1) c_~N~0) (<= c_~N~0 v_subst_67) (forall ((v_subst_65 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2978) c_~A~0.base))) (<= (let ((.cse1 (* v_subst_65 4))) (+ (select .cse0 (+ .cse1 c_~A~0.offset 4)) (select .cse0 (+ .cse1 c_~A~0.offset)) c_~counter~0)) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_67 4))) (select .cse0 .cse2)))) (< (+ 2 v_subst_65) c_~N~0) (<= c_~N~0 (+ v_subst_65 1)))))) (forall ((v_ArrVal_2978 (Array Int Int)) (v_subst_68 Int)) (or (<= c_~N~0 v_subst_68) (forall ((v_subst_66 Int)) (or (<= c_~N~0 (+ v_subst_66 1)) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2978) c_~A~0.base))) (< (+ (select .cse3 .cse2) (select .cse3 (+ c_~A~0.offset (* v_subst_68 4)))) (let ((.cse4 (* v_subst_66 4))) (+ (select .cse3 (+ c_~A~0.offset .cse4)) c_~counter~0 (select .cse3 (+ c_~A~0.offset .cse4 4)) 1)))) (< (+ 2 v_subst_66) c_~N~0))) (< (+ v_subst_68 1) c_~N~0))))) is different from false [2023-08-24 02:13:26,941 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:13:26,966 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:13:26,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 76 [2023-08-24 02:13:26,992 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:13:26,992 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 334 treesize of output 292 [2023-08-24 02:13:27,000 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:13:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:13:27,011 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:13:27,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 42 [2023-08-24 02:13:27,037 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 02:13:27,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 51 [2023-08-24 02:13:27,094 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:13:27,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 77 [2023-08-24 02:13:27,112 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:13:27,112 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 166 treesize of output 143 [2023-08-24 02:13:27,131 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:13:27,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 93 [2023-08-24 02:13:27,159 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 02:13:27,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 02:13:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:13:27,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742893930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:13:27,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:13:27,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 44 [2023-08-24 02:13:27,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696754492] [2023-08-24 02:13:27,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:13:27,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-24 02:13:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:13:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-24 02:13:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1749, Unknown=1, NotChecked=86, Total=2070 [2023-08-24 02:13:27,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 02:13:27,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1250 places, 2456 transitions, 76792 flow. Second operand has 46 states, 46 states have (on average 54.32608695652174) internal successors, (2499), 46 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:13:27,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:13:27,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 02:13:27,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:13:46,279 INFO L124 PetriNetUnfolderBase]: 5968/10244 cut-off events. [2023-08-24 02:13:46,279 INFO L125 PetriNetUnfolderBase]: For 2227832/2227832 co-relation queries the response was YES. [2023-08-24 02:13:46,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189004 conditions, 10244 events. 5968/10244 cut-off events. For 2227832/2227832 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 75622 event pairs, 528 based on Foata normal form. 2/10188 useless extension candidates. Maximal degree in co-relation 188592. Up to 9381 conditions per place. [2023-08-24 02:13:46,606 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 2204 selfloop transitions, 426 changer transitions 7/2637 dead transitions. [2023-08-24 02:13:46,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1313 places, 2637 transitions, 90403 flow [2023-08-24 02:13:46,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-24 02:13:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-24 02:13:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3633 transitions. [2023-08-24 02:13:46,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26525992990654207 [2023-08-24 02:13:46,609 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3633 transitions. [2023-08-24 02:13:46,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3633 transitions. [2023-08-24 02:13:46,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:13:46,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3633 transitions. [2023-08-24 02:13:46,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 56.765625) internal successors, (3633), 64 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 02:13:46,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 214.0) internal successors, (13910), 65 states have internal predecessors, (13910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:13:46,744 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 214.0) internal successors, (13910), 65 states have internal predecessors, (13910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:13:46,744 INFO L175 Difference]: Start difference. First operand has 1250 places, 2456 transitions, 76792 flow. Second operand 64 states and 3633 transitions. [2023-08-24 02:13:46,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1313 places, 2637 transitions, 90403 flow Received shutdown request... [2023-08-24 02:13:57,035 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 02:13:57,038 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:13:57,038 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 02:13:57,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-08-24 02:13:57,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:13:57,237 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 02:13:57,238 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 02:13:57,238 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 02:13:57,238 INFO L445 BasicCegarLoop]: Path program histogram: [78, 1, 1, 1, 1, 1] [2023-08-24 02:13:57,240 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 02:13:57,240 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 02:13:57,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:13:57 BasicIcfg [2023-08-24 02:13:57,243 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 02:13:57,243 INFO L158 Benchmark]: Toolchain (without parser) took 767067.35ms. Allocated memory was 408.9MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 385.6MB in the beginning and 5.0GB in the end (delta: -4.6GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-24 02:13:57,243 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 408.9MB. Free memory is still 385.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:13:57,243 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.71ms. Allocated memory is still 408.9MB. Free memory was 385.1MB in the beginning and 373.7MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 02:13:57,243 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.97ms. Allocated memory is still 408.9MB. Free memory was 373.7MB in the beginning and 371.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:13:57,243 INFO L158 Benchmark]: Boogie Preprocessor took 23.10ms. Allocated memory is still 408.9MB. Free memory was 371.7MB in the beginning and 370.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:13:57,243 INFO L158 Benchmark]: RCFGBuilder took 539.38ms. Allocated memory is still 408.9MB. Free memory was 370.2MB in the beginning and 344.5MB in the end (delta: 25.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-24 02:13:57,244 INFO L158 Benchmark]: TraceAbstraction took 766253.35ms. Allocated memory was 408.9MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 344.0MB in the beginning and 5.0GB in the end (delta: -4.6GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-24 02:13:57,244 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 408.9MB. Free memory is still 385.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 213.71ms. Allocated memory is still 408.9MB. Free memory was 385.1MB in the beginning and 373.7MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.97ms. Allocated memory is still 408.9MB. Free memory was 373.7MB in the beginning and 371.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.10ms. Allocated memory is still 408.9MB. Free memory was 371.7MB in the beginning and 370.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 539.38ms. Allocated memory is still 408.9MB. Free memory was 370.2MB in the beginning and 344.5MB in the end (delta: 25.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 766253.35ms. Allocated memory was 408.9MB in the beginning and 8.2GB in the end (delta: 7.8GB). Free memory was 344.0MB in the beginning and 5.0GB in the end (delta: -4.6GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 100 PlacesBefore, 21 PlacesAfterwards, 102 TransitionsBefore, 17 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 59 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 102 TotalNumberOfCompositions, 647 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 608, independent: 597, independent conditional: 0, independent unconditional: 597, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 302, independent: 297, independent conditional: 0, independent unconditional: 297, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 608, independent: 300, independent conditional: 0, independent unconditional: 300, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 302, unknown conditional: 0, unknown unconditional: 302] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: 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: 76]: 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, 126 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: 766.1s, OverallIterations: 83, TraceHistogramMax: 3, PathProgramHistogramMax: 78, EmptinessCheckTime: 0.0s, AutomataDifference: 563.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 21 mSolverCounterUnknown, 7777 SdHoareTripleChecker+Valid, 58.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7777 mSDsluCounter, 3728 SdHoareTripleChecker+Invalid, 52.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3760 IncrementalHoareTripleChecker+Unchecked, 3410 mSDsCounter, 2327 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 76859 IncrementalHoareTripleChecker+Invalid, 82967 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2327 mSolverCounterUnsat, 318 mSDtfsCounter, 76859 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5725 GetRequests, 1712 SyntacticMatches, 215 SemanticMatches, 3798 ConstructedPredicates, 28 IntricatePredicates, 3 DeprecatedPredicates, 58950 ImplicationChecksByTransitivity, 178.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76792occurred in iteration=82, InterpolantAutomatonStates: 2251, 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: 1.1s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 167.9s InterpolantComputationTime, 3474 NumberOfCodeBlocks, 3474 NumberOfCodeBlocksAsserted, 271 NumberOfCheckSat, 4946 ConstructedInterpolants, 299 QuantifiedInterpolants, 103834 SizeOfPredicates, 2543 NumberOfNonLiveVariables, 21627 ConjunctsInSsa, 6745 ConjunctsInUnsatCore, 243 InterpolantComputations, 5 PerfectInterpolantSequences, 474/3299 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