/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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:09:56,297 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:09:56,376 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 [2023-08-26 13:09:56,381 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:09:56,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:09:56,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:09:56,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:09:56,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:09:56,413 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:09:56,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:09:56,417 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:09:56,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:09:56,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:09:56,418 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:09:56,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:09:56,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:09:56,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:09:56,419 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:09:56,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:09:56,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:09:56,420 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:09:56,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:09:56,421 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:09:56,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:09:56,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:09:56,422 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:09:56,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:09:56,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:09:56,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:09:56,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:09:56,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:09:56,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:09:56,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:09:56,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:09:56,423 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:09:56,423 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:09:56,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:09:56,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:09:56,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:09:56,759 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:09:56,760 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:09:56,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-26 13:09:57,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:09:58,161 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:09:58,161 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-26 13:09:58,167 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add1be51f/aca3deb36c194fec8042ed8a74f761e1/FLAGbaaf240c4 [2023-08-26 13:09:58,181 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add1be51f/aca3deb36c194fec8042ed8a74f761e1 [2023-08-26 13:09:58,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:09:58,187 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:09:58,189 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:09:58,189 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:09:58,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:09:58,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,194 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35af24d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58, skipping insertion in model container [2023-08-26 13:09:58,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,212 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:09:58,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:09:58,374 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:09:58,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:09:58,407 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:09:58,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58 WrapperNode [2023-08-26 13:09:58,408 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:09:58,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:09:58,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:09:58,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:09:58,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,434 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2023-08-26 13:09:58,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:09:58,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:09:58,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:09:58,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:09:58,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,451 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,453 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:09:58,453 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:09:58,453 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:09:58,453 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:09:58,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (1/1) ... [2023-08-26 13:09:58,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:09:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:09:58,480 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) [2023-08-26 13:09:58,492 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 [2023-08-26 13:09:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:09:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:09:58,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:09:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:09:58,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:09:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:09:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:09:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:09:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:09:58,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:09:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:09:58,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:09:58,517 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 13:09:58,584 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:09:58,586 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:09:58,817 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:09:58,822 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:09:58,822 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 13:09:58,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:09:58 BoogieIcfgContainer [2023-08-26 13:09:58,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:09:58,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:09:58,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:09:58,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:09:58,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:09:58" (1/3) ... [2023-08-26 13:09:58,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8cc20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:09:58, skipping insertion in model container [2023-08-26 13:09:58,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:09:58" (2/3) ... [2023-08-26 13:09:58,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8cc20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:09:58, skipping insertion in model container [2023-08-26 13:09:58,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:09:58" (3/3) ... [2023-08-26 13:09:58,830 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-08-26 13:09:58,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:09:58,847 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 13:09:58,847 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:09:58,939 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 13:09:58,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2023-08-26 13:09:59,043 INFO L124 PetriNetUnfolderBase]: 5/86 cut-off events. [2023-08-26 13:09:59,043 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:09:59,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-26 13:09:59,051 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2023-08-26 13:09:59,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 77 transitions, 166 flow [2023-08-26 13:09:59,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:09:59,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 77 transitions, 166 flow [2023-08-26 13:09:59,074 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 77 transitions, 166 flow [2023-08-26 13:09:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 166 flow [2023-08-26 13:09:59,110 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-26 13:09:59,111 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:09:59,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-26 13:09:59,113 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 13:10:01,203 INFO L134 LiptonReduction]: Checked pairs total: 715 [2023-08-26 13:10:01,204 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-26 13:10:01,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:10:01,221 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;@1b3471b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:10:01,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 13:10:01,223 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:10:01,223 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 13:10:01,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:10:01,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:01,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:10:01,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:01,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash 331, now seen corresponding path program 1 times [2023-08-26 13:10:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:01,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916356561] [2023-08-26 13:10:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:01,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:01,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:01,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916356561] [2023-08-26 13:10:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916356561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:01,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:01,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:10:01,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128279782] [2023-08-26 13:10:01,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:01,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:10:01,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:10:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:10:01,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 165 [2023-08-26 13:10:01,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:01,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 165 [2023-08-26 13:10:01,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:01,410 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-08-26 13:10:01,410 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 13:10:01,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 526 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-26 13:10:01,414 INFO L140 encePairwiseOnDemand]: 163/165 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 13:10:01,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-26 13:10:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:10:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:10:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 181 transitions. [2023-08-26 13:10:01,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484848484848485 [2023-08-26 13:10:01,428 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 181 transitions. [2023-08-26 13:10:01,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 181 transitions. [2023-08-26 13:10:01,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:01,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 181 transitions. [2023-08-26 13:10:01,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,444 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,446 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 181 transitions. [2023-08-26 13:10:01,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-26 13:10:01,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 13:10:01,449 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 13:10:01,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 13:10:01,456 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 13:10:01,456 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 13:10:01,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:01,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:10:01,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:10:01,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:01,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 324234, now seen corresponding path program 1 times [2023-08-26 13:10:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:01,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188165940] [2023-08-26 13:10:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:01,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:01,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188165940] [2023-08-26 13:10:01,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188165940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:01,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:01,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757742095] [2023-08-26 13:10:01,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:01,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:01,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:10:01,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:01,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:10:01,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:01,643 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-08-26 13:10:01,643 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:10:01,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-26 13:10:01,644 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 13:10:01,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-26 13:10:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:01,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 13:10:01,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080808080808081 [2023-08-26 13:10:01,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 13:10:01,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 13:10:01,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:01,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 13:10:01,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,650 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 202 transitions. [2023-08-26 13:10:01,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-26 13:10:01,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:10:01,651 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 13:10:01,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 13:10:01,652 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 13:10:01,652 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 13:10:01,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:01,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:10:01,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:10:01,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:01,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash 324235, now seen corresponding path program 1 times [2023-08-26 13:10:01,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:01,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607457887] [2023-08-26 13:10:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:01,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:01,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:01,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607457887] [2023-08-26 13:10:01,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607457887] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:01,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:01,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:01,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194724519] [2023-08-26 13:10:01,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:01,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:01,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:01,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:01,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:01,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 165 [2023-08-26 13:10:01,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:01,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 165 [2023-08-26 13:10:01,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:01,796 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-08-26 13:10:01,796 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:10:01,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 415 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-26 13:10:01,797 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:10:01,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-26 13:10:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-08-26 13:10:01,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161616161616162 [2023-08-26 13:10:01,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-08-26 13:10:01,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-08-26 13:10:01,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:01,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-08-26 13:10:01,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,803 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 206 transitions. [2023-08-26 13:10:01,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-26 13:10:01,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:01,804 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 13:10:01,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 13:10:01,805 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 13:10:01,805 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 13:10:01,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:01,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:10:01,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:10:01,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:01,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash 311595067, now seen corresponding path program 1 times [2023-08-26 13:10:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892748268] [2023-08-26 13:10:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:01,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:01,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:01,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892748268] [2023-08-26 13:10:01,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892748268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:01,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:01,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:10:01,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10587710] [2023-08-26 13:10:01,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:01,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:10:01,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:01,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:10:01,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:10:01,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:01,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:01,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:01,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:01,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:02,016 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-08-26 13:10:02,016 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:10:02,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 290 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-26 13:10:02,021 INFO L140 encePairwiseOnDemand]: 163/165 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 13:10:02,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-26 13:10:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:02,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-08-26 13:10:02,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-08-26 13:10:02,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-08-26 13:10:02,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-08-26 13:10:02,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:02,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-08-26 13:10:02,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,027 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 192 transitions. [2023-08-26 13:10:02,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-26 13:10:02,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:02,028 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 13:10:02,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 13:10:02,030 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 13:10:02,030 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 13:10:02,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:02,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:10:02,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:10:02,031 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:02,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:02,032 INFO L85 PathProgramCache]: Analyzing trace with hash 311595066, now seen corresponding path program 1 times [2023-08-26 13:10:02,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:02,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262418281] [2023-08-26 13:10:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:02,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:02,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:02,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262418281] [2023-08-26 13:10:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262418281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:02,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:02,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:10:02,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761427260] [2023-08-26 13:10:02,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:02,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:10:02,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:10:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:10:02,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 165 [2023-08-26 13:10:02,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:02,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 165 [2023-08-26 13:10:02,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:02,171 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-08-26 13:10:02,172 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 13:10:02,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-26 13:10:02,174 INFO L140 encePairwiseOnDemand]: 163/165 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 13:10:02,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 13:10:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-26 13:10:02,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797979797979798 [2023-08-26 13:10:02,181 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-26 13:10:02,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-26 13:10:02,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:02,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-26 13:10:02,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,184 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 188 transitions. [2023-08-26 13:10:02,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 13:10:02,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:02,186 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 13:10:02,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 13:10:02,189 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 13:10:02,189 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 13:10:02,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:02,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:10:02,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:02,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash -683633089, now seen corresponding path program 1 times [2023-08-26 13:10:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:02,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855838875] [2023-08-26 13:10:02,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:02,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:02,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:02,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855838875] [2023-08-26 13:10:02,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855838875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:10:02,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:10:02,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:10:02,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175198513] [2023-08-26 13:10:02,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:10:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:10:02,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:10:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:10:02,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 165 [2023-08-26 13:10:02,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:02,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 165 [2023-08-26 13:10:02,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:02,474 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-08-26 13:10:02,474 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 13:10:02,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-26 13:10:02,476 INFO L140 encePairwiseOnDemand]: 161/165 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-26 13:10:02,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-08-26 13:10:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:10:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:10:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-26 13:10:02,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-08-26 13:10:02,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-26 13:10:02,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-26 13:10:02,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:02,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-26 13:10:02,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,481 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 249 transitions. [2023-08-26 13:10:02,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-08-26 13:10:02,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:02,482 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2023-08-26 13:10:02,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-26 13:10:02,484 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -4 predicate places. [2023-08-26 13:10:02,487 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2023-08-26 13:10:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:02,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:02,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:02,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:10:02,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:02,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 355104081, now seen corresponding path program 1 times [2023-08-26 13:10:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062757798] [2023-08-26 13:10:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:02,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:02,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062757798] [2023-08-26 13:10:02,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062757798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:02,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175306787] [2023-08-26 13:10:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:02,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:02,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:02,781 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) [2023-08-26 13:10:02,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:10:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:02,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 13:10:02,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:03,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175306787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:03,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:03,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2023-08-26 13:10:03,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232347951] [2023-08-26 13:10:03,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:03,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:10:03,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:10:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:10:03,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:10:03,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:03,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:10:03,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:03,440 INFO L124 PetriNetUnfolderBase]: 87/160 cut-off events. [2023-08-26 13:10:03,440 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 13:10:03,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 160 events. 87/160 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 506 event pairs, 2 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 392. Up to 75 conditions per place. [2023-08-26 13:10:03,441 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 24 selfloop transitions, 5 changer transitions 21/50 dead transitions. [2023-08-26 13:10:03,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 242 flow [2023-08-26 13:10:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:10:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:10:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 478 transitions. [2023-08-26 13:10:03,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41385281385281386 [2023-08-26 13:10:03,446 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 478 transitions. [2023-08-26 13:10:03,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 478 transitions. [2023-08-26 13:10:03,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:03,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 478 transitions. [2023-08-26 13:10:03,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,450 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,451 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 7 states and 478 transitions. [2023-08-26 13:10:03,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 242 flow [2023-08-26 13:10:03,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:10:03,453 INFO L231 Difference]: Finished difference. Result has 34 places, 19 transitions, 86 flow [2023-08-26 13:10:03,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2023-08-26 13:10:03,453 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-26 13:10:03,454 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 86 flow [2023-08-26 13:10:03,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:03,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:03,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:03,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:03,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:03,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1259958227, now seen corresponding path program 1 times [2023-08-26 13:10:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007041736] [2023-08-26 13:10:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:03,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007041736] [2023-08-26 13:10:03,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007041736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:03,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350218907] [2023-08-26 13:10:03,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:03,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:03,851 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) [2023-08-26 13:10:03,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:10:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:03,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 13:10:03,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:04,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:04,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350218907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:04,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:04,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-26 13:10:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275395564] [2023-08-26 13:10:04,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 13:10:04,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 13:10:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-26 13:10:04,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:10:04,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 86 flow. Second operand has 9 states, 9 states have (on average 69.88888888888889) internal successors, (629), 9 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:04,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:04,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:10:04,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:04,271 INFO L124 PetriNetUnfolderBase]: 48/93 cut-off events. [2023-08-26 13:10:04,271 INFO L125 PetriNetUnfolderBase]: For 50/57 co-relation queries the response was YES. [2023-08-26 13:10:04,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 93 events. 48/93 cut-off events. For 50/57 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 8 based on Foata normal form. 8/101 useless extension candidates. Maximal degree in co-relation 281. Up to 69 conditions per place. [2023-08-26 13:10:04,272 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 17 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2023-08-26 13:10:04,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 201 flow [2023-08-26 13:10:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:10:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:10:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 434 transitions. [2023-08-26 13:10:04,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383838383838384 [2023-08-26 13:10:04,274 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 434 transitions. [2023-08-26 13:10:04,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 434 transitions. [2023-08-26 13:10:04,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:04,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 434 transitions. [2023-08-26 13:10:04,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:04,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:04,277 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:04,277 INFO L175 Difference]: Start difference. First operand has 34 places, 19 transitions, 86 flow. Second operand 6 states and 434 transitions. [2023-08-26 13:10:04,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 201 flow [2023-08-26 13:10:04,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 171 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 13:10:04,279 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 98 flow [2023-08-26 13:10:04,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-08-26 13:10:04,279 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-26 13:10:04,279 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 98 flow [2023-08-26 13:10:04,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 69.88888888888889) internal successors, (629), 9 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:04,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:04,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:04,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:04,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-26 13:10:04,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:04,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:04,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1776123691, now seen corresponding path program 2 times [2023-08-26 13:10:04,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:04,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983398115] [2023-08-26 13:10:04,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:04,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:04,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:04,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983398115] [2023-08-26 13:10:04,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983398115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:04,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723169729] [2023-08-26 13:10:04,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:04,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:04,690 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) [2023-08-26 13:10:04,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:10:04,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:04,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 13:10:04,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:04,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723169729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:05,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 13 [2023-08-26 13:10:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590503741] [2023-08-26 13:10:05,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:05,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 13:10:05,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 13:10:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-08-26 13:10:05,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:05,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 98 flow. Second operand has 15 states, 15 states have (on average 61.4) internal successors, (921), 15 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:05,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:05,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:05,233 INFO L124 PetriNetUnfolderBase]: 113/211 cut-off events. [2023-08-26 13:10:05,234 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 13:10:05,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 211 events. 113/211 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 682 event pairs, 5 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 611. Up to 92 conditions per place. [2023-08-26 13:10:05,235 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 44 selfloop transitions, 24 changer transitions 14/82 dead transitions. [2023-08-26 13:10:05,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 82 transitions, 452 flow [2023-08-26 13:10:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:10:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:10:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 910 transitions. [2023-08-26 13:10:05,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2023-08-26 13:10:05,239 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 910 transitions. [2023-08-26 13:10:05,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 910 transitions. [2023-08-26 13:10:05,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:05,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 910 transitions. [2023-08-26 13:10:05,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.0) internal successors, (910), 14 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,246 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,247 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 98 flow. Second operand 14 states and 910 transitions. [2023-08-26 13:10:05,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 82 transitions, 452 flow [2023-08-26 13:10:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 82 transitions, 439 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:05,251 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 250 flow [2023-08-26 13:10:05,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=250, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-26 13:10:05,252 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-08-26 13:10:05,252 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 250 flow [2023-08-26 13:10:05,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.4) internal successors, (921), 15 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:05,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:05,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:05,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:05,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash -168198231, now seen corresponding path program 3 times [2023-08-26 13:10:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:05,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701733535] [2023-08-26 13:10:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:05,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701733535] [2023-08-26 13:10:05,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701733535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605355198] [2023-08-26 13:10:05,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:10:05,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:05,648 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) [2023-08-26 13:10:05,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:10:05,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:10:05,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:05,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:05,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:05,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605355198] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:05,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:05,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-26 13:10:05,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114882375] [2023-08-26 13:10:05,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:05,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:10:05,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:05,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:10:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:10:05,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:10:05,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:05,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:05,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:10:05,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:06,071 INFO L124 PetriNetUnfolderBase]: 116/216 cut-off events. [2023-08-26 13:10:06,071 INFO L125 PetriNetUnfolderBase]: For 516/521 co-relation queries the response was YES. [2023-08-26 13:10:06,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 216 events. 116/216 cut-off events. For 516/521 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 701 event pairs, 14 based on Foata normal form. 7/223 useless extension candidates. Maximal degree in co-relation 872. Up to 164 conditions per place. [2023-08-26 13:10:06,073 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 42 selfloop transitions, 15 changer transitions 8/67 dead transitions. [2023-08-26 13:10:06,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 509 flow [2023-08-26 13:10:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:10:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:10:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 586 transitions. [2023-08-26 13:10:06,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44393939393939397 [2023-08-26 13:10:06,075 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 586 transitions. [2023-08-26 13:10:06,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 586 transitions. [2023-08-26 13:10:06,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:06,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 586 transitions. [2023-08-26 13:10:06,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.25) internal successors, (586), 8 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,079 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,079 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 250 flow. Second operand 8 states and 586 transitions. [2023-08-26 13:10:06,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 509 flow [2023-08-26 13:10:06,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 421 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-08-26 13:10:06,085 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 268 flow [2023-08-26 13:10:06,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-26 13:10:06,085 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2023-08-26 13:10:06,085 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 268 flow [2023-08-26 13:10:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:06,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:06,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:06,292 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:06,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1163260319, now seen corresponding path program 2 times [2023-08-26 13:10:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:06,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943394753] [2023-08-26 13:10:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943394753] [2023-08-26 13:10:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943394753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429270313] [2023-08-26 13:10:06,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:06,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:06,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:06,473 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) [2023-08-26 13:10:06,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:10:06,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:06,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:06,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:06,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:06,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429270313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:06,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:06,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-26 13:10:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903394914] [2023-08-26 13:10:06,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:10:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:10:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:10:06,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:10:06,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:06,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:10:06,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:06,898 INFO L124 PetriNetUnfolderBase]: 142/264 cut-off events. [2023-08-26 13:10:06,898 INFO L125 PetriNetUnfolderBase]: For 786/797 co-relation queries the response was YES. [2023-08-26 13:10:06,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 264 events. 142/264 cut-off events. For 786/797 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 955 event pairs, 18 based on Foata normal form. 11/271 useless extension candidates. Maximal degree in co-relation 1047. Up to 204 conditions per place. [2023-08-26 13:10:06,901 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 51 selfloop transitions, 14 changer transitions 4/73 dead transitions. [2023-08-26 13:10:06,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 548 flow [2023-08-26 13:10:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:10:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:10:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 584 transitions. [2023-08-26 13:10:06,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-08-26 13:10:06,903 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 584 transitions. [2023-08-26 13:10:06,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 584 transitions. [2023-08-26 13:10:06,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:06,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 584 transitions. [2023-08-26 13:10:06,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.0) internal successors, (584), 8 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,907 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,907 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 268 flow. Second operand 8 states and 584 transitions. [2023-08-26 13:10:06,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 548 flow [2023-08-26 13:10:06,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 501 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-26 13:10:06,911 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 327 flow [2023-08-26 13:10:06,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-26 13:10:06,912 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2023-08-26 13:10:06,912 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 327 flow [2023-08-26 13:10:06,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:06,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:06,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:06,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:07,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 13:10:07,123 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:07,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:07,123 INFO L85 PathProgramCache]: Analyzing trace with hash 296253715, now seen corresponding path program 3 times [2023-08-26 13:10:07,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:07,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732927474] [2023-08-26 13:10:07,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:07,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:07,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732927474] [2023-08-26 13:10:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732927474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017078792] [2023-08-26 13:10:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:10:07,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:07,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:07,342 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) [2023-08-26 13:10:07,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:10:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:10:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:07,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 13:10:07,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:07,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:07,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017078792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:07,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:07,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-08-26 13:10:07,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479658972] [2023-08-26 13:10:07,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:07,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:10:07,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:10:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:10:07,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:10:07,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 327 flow. Second operand has 11 states, 11 states have (on average 69.72727272727273) internal successors, (767), 11 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:07,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:07,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:10:07,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:07,813 INFO L124 PetriNetUnfolderBase]: 186/348 cut-off events. [2023-08-26 13:10:07,813 INFO L125 PetriNetUnfolderBase]: For 1047/1055 co-relation queries the response was YES. [2023-08-26 13:10:07,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 348 events. 186/348 cut-off events. For 1047/1055 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1391 event pairs, 27 based on Foata normal form. 9/353 useless extension candidates. Maximal degree in co-relation 1402. Up to 238 conditions per place. [2023-08-26 13:10:07,816 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 60 selfloop transitions, 20 changer transitions 7/91 dead transitions. [2023-08-26 13:10:07,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 704 flow [2023-08-26 13:10:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:10:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:10:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 730 transitions. [2023-08-26 13:10:07,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-08-26 13:10:07,819 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 730 transitions. [2023-08-26 13:10:07,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 730 transitions. [2023-08-26 13:10:07,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:07,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 730 transitions. [2023-08-26 13:10:07,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:07,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:07,824 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:07,824 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 327 flow. Second operand 10 states and 730 transitions. [2023-08-26 13:10:07,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 704 flow [2023-08-26 13:10:07,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 651 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-26 13:10:07,830 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 424 flow [2023-08-26 13:10:07,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=424, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-08-26 13:10:07,831 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 41 predicate places. [2023-08-26 13:10:07,831 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 424 flow [2023-08-26 13:10:07,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 69.72727272727273) internal successors, (767), 11 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:07,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:07,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:07,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 13:10:08,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:08,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:08,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1880880287, now seen corresponding path program 1 times [2023-08-26 13:10:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:08,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767924172] [2023-08-26 13:10:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:08,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:08,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767924172] [2023-08-26 13:10:08,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767924172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:08,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449253077] [2023-08-26 13:10:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:08,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:08,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:08,451 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) [2023-08-26 13:10:08,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:10:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:08,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:10:08,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:08,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:10,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449253077] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:10,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:10,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:10:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100920842] [2023-08-26 13:10:10,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:10:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:10:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:10:10,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:10,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 424 flow. Second operand has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:10,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:10,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:10,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:12,132 INFO L124 PetriNetUnfolderBase]: 283/544 cut-off events. [2023-08-26 13:10:12,133 INFO L125 PetriNetUnfolderBase]: For 1551/1551 co-relation queries the response was YES. [2023-08-26 13:10:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 544 events. 283/544 cut-off events. For 1551/1551 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2556 event pairs, 33 based on Foata normal form. 3/547 useless extension candidates. Maximal degree in co-relation 2167. Up to 270 conditions per place. [2023-08-26 13:10:12,136 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 93 selfloop transitions, 49 changer transitions 28/170 dead transitions. [2023-08-26 13:10:12,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 170 transitions, 1240 flow [2023-08-26 13:10:12,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:10:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:10:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1492 transitions. [2023-08-26 13:10:12,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39314888010540183 [2023-08-26 13:10:12,141 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1492 transitions. [2023-08-26 13:10:12,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1492 transitions. [2023-08-26 13:10:12,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:12,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1492 transitions. [2023-08-26 13:10:12,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.8695652173913) internal successors, (1492), 23 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:12,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:12,150 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:12,151 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 424 flow. Second operand 23 states and 1492 transitions. [2023-08-26 13:10:12,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 170 transitions, 1240 flow [2023-08-26 13:10:12,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 170 transitions, 1169 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-08-26 13:10:12,162 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 668 flow [2023-08-26 13:10:12,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=668, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-08-26 13:10:12,163 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2023-08-26 13:10:12,163 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 668 flow [2023-08-26 13:10:12,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:12,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:12,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:12,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 13:10:12,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:12,368 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:12,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2144859197, now seen corresponding path program 2 times [2023-08-26 13:10:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726897484] [2023-08-26 13:10:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:12,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:12,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:12,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726897484] [2023-08-26 13:10:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726897484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:12,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923895681] [2023-08-26 13:10:12,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:10:12,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:12,863 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) [2023-08-26 13:10:12,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:10:12,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:10:12,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:12,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:10:12,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:13,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923895681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:14,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 13:10:14,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031526643] [2023-08-26 13:10:14,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:10:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:10:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:10:14,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:14,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 668 flow. Second operand has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:14,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:14,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:14,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:16,715 INFO L124 PetriNetUnfolderBase]: 324/630 cut-off events. [2023-08-26 13:10:16,715 INFO L125 PetriNetUnfolderBase]: For 4298/4298 co-relation queries the response was YES. [2023-08-26 13:10:16,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3239 conditions, 630 events. 324/630 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3154 event pairs, 27 based on Foata normal form. 3/633 useless extension candidates. Maximal degree in co-relation 3206. Up to 281 conditions per place. [2023-08-26 13:10:16,721 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 92 selfloop transitions, 73 changer transitions 21/186 dead transitions. [2023-08-26 13:10:16,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 1765 flow [2023-08-26 13:10:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 13:10:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 13:10:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1618 transitions. [2023-08-26 13:10:16,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922424242424242 [2023-08-26 13:10:16,727 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1618 transitions. [2023-08-26 13:10:16,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1618 transitions. [2023-08-26 13:10:16,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:16,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1618 transitions. [2023-08-26 13:10:16,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.72) internal successors, (1618), 25 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:16,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:16,737 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:16,738 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 668 flow. Second operand 25 states and 1618 transitions. [2023-08-26 13:10:16,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 1765 flow [2023-08-26 13:10:16,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 186 transitions, 1611 flow, removed 59 selfloop flow, removed 12 redundant places. [2023-08-26 13:10:16,753 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 1130 flow [2023-08-26 13:10:16,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1130, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2023-08-26 13:10:16,754 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 92 predicate places. [2023-08-26 13:10:16,754 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 1130 flow [2023-08-26 13:10:16,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:16,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:16,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:16,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:16,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 13:10:16,961 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:16,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash -749395943, now seen corresponding path program 4 times [2023-08-26 13:10:16,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:16,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326253195] [2023-08-26 13:10:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326253195] [2023-08-26 13:10:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326253195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696625193] [2023-08-26 13:10:17,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:10:17,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:17,141 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) [2023-08-26 13:10:17,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 13:10:17,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:10:17,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:17,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:10:17,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:17,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:17,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696625193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:17,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-08-26 13:10:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137345057] [2023-08-26 13:10:17,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:10:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:10:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:10:17,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:10:17,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 1130 flow. Second operand has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:17,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:17,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:10:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:17,936 INFO L124 PetriNetUnfolderBase]: 325/624 cut-off events. [2023-08-26 13:10:17,936 INFO L125 PetriNetUnfolderBase]: For 5599/5599 co-relation queries the response was YES. [2023-08-26 13:10:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3495 conditions, 624 events. 325/624 cut-off events. For 5599/5599 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3030 event pairs, 60 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 3454. Up to 526 conditions per place. [2023-08-26 13:10:17,942 INFO L140 encePairwiseOnDemand]: 158/165 looper letters, 109 selfloop transitions, 18 changer transitions 21/148 dead transitions. [2023-08-26 13:10:17,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 148 transitions, 1611 flow [2023-08-26 13:10:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:10:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:10:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 865 transitions. [2023-08-26 13:10:17,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2023-08-26 13:10:17,946 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 865 transitions. [2023-08-26 13:10:17,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 865 transitions. [2023-08-26 13:10:17,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:17,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 865 transitions. [2023-08-26 13:10:17,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.53846153846153) internal successors, (865), 13 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:17,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:17,951 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:17,951 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 1130 flow. Second operand 13 states and 865 transitions. [2023-08-26 13:10:17,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 148 transitions, 1611 flow [2023-08-26 13:10:17,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1290 flow, removed 142 selfloop flow, removed 13 redundant places. [2023-08-26 13:10:17,981 INFO L231 Difference]: Finished difference. Result has 119 places, 111 transitions, 897 flow [2023-08-26 13:10:17,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=897, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2023-08-26 13:10:17,982 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 91 predicate places. [2023-08-26 13:10:17,982 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 897 flow [2023-08-26 13:10:17,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:17,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:17,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:17,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 13:10:18,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 13:10:18,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:18,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1943691345, now seen corresponding path program 3 times [2023-08-26 13:10:18,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:18,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491983822] [2023-08-26 13:10:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:18,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:19,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491983822] [2023-08-26 13:10:19,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491983822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:19,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933072211] [2023-08-26 13:10:19,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:10:19,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:19,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:19,151 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) [2023-08-26 13:10:19,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 13:10:19,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:10:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:19,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:10:19,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:19,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:23,085 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse4 (div (+ (mod c_~x_1~0 4294967296) (- 4294967294)) 4294967296))) (and (forall ((v_z_55 Int)) (or (< .cse0 v_z_55) (let ((.cse1 (* v_z_55 2))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse1) 4294967296) 4294967296)) (+ c_~x_2~0 .cse1 4294967295 .cse2))) (<= v_z_55 .cse3))) (or (forall ((v_z_55 Int)) (or (< .cse0 v_z_55) (<= v_z_55 .cse3) (let ((.cse5 (* v_z_55 2))) (< (+ (* .cse4 4294967296) c_~x_2~0 .cse5 .cse2 4294967293) (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse5) 4294967296) 4294967296)))))) (< .cse4 0)) (forall ((v_z_55 Int)) (or (let ((.cse6 (* v_z_55 2))) (< (+ c_~x_2~0 .cse6 .cse2) (+ c_~x_1~0 3 (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296)))) (< .cse0 v_z_55) (<= v_z_55 .cse3))) (or (forall ((v_z_55 Int)) (or (< .cse0 v_z_55) (<= v_z_55 .cse3) (let ((.cse7 (* v_z_55 2))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) 1) (+ c_~x_2~0 .cse7 .cse2))))) (< 0 (+ .cse4 1))))) is different from false [2023-08-26 13:10:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 13:10:23,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933072211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:23,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:23,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-26 13:10:23,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894925691] [2023-08-26 13:10:23,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:23,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:10:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:10:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=331, Unknown=1, NotChecked=38, Total=462 [2023-08-26 13:10:23,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:23,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 897 flow. Second operand has 22 states, 22 states have (on average 60.81818181818182) internal successors, (1338), 22 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:23,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:23,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:23,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:29,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:10:32,224 INFO L124 PetriNetUnfolderBase]: 410/782 cut-off events. [2023-08-26 13:10:32,224 INFO L125 PetriNetUnfolderBase]: For 5515/5515 co-relation queries the response was YES. [2023-08-26 13:10:32,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 782 events. 410/782 cut-off events. For 5515/5515 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3967 event pairs, 26 based on Foata normal form. 4/778 useless extension candidates. Maximal degree in co-relation 4017. Up to 293 conditions per place. [2023-08-26 13:10:32,231 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 116 selfloop transitions, 104 changer transitions 20/240 dead transitions. [2023-08-26 13:10:32,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 240 transitions, 2256 flow [2023-08-26 13:10:32,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 13:10:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 13:10:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2133 transitions. [2023-08-26 13:10:32,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39173553719008264 [2023-08-26 13:10:32,235 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2133 transitions. [2023-08-26 13:10:32,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2133 transitions. [2023-08-26 13:10:32,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:32,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2133 transitions. [2023-08-26 13:10:32,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.63636363636364) internal successors, (2133), 33 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,246 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,247 INFO L175 Difference]: Start difference. First operand has 119 places, 111 transitions, 897 flow. Second operand 33 states and 2133 transitions. [2023-08-26 13:10:32,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 240 transitions, 2256 flow [2023-08-26 13:10:32,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 240 transitions, 2183 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-08-26 13:10:32,268 INFO L231 Difference]: Finished difference. Result has 144 places, 142 transitions, 1580 flow [2023-08-26 13:10:32,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1580, PETRI_PLACES=144, PETRI_TRANSITIONS=142} [2023-08-26 13:10:32,268 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2023-08-26 13:10:32,269 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 142 transitions, 1580 flow [2023-08-26 13:10:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.81818181818182) internal successors, (1338), 22 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:32,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:32,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:32,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 13:10:32,475 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:32,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1752844233, now seen corresponding path program 4 times [2023-08-26 13:10:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:32,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246769482] [2023-08-26 13:10:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:32,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:32,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246769482] [2023-08-26 13:10:32,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246769482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:32,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321394611] [2023-08-26 13:10:32,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:10:32,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:32,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:32,997 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) [2023-08-26 13:10:33,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 13:10:33,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:10:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:33,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:10:33,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:33,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:36,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321394611] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:36,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:36,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:10:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421538264] [2023-08-26 13:10:36,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:36,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:10:36,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:10:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:10:36,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:36,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 142 transitions, 1580 flow. Second operand has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 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) [2023-08-26 13:10:36,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:36,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:36,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:37,413 INFO L124 PetriNetUnfolderBase]: 446/853 cut-off events. [2023-08-26 13:10:37,414 INFO L125 PetriNetUnfolderBase]: For 7895/7895 co-relation queries the response was YES. [2023-08-26 13:10:37,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5078 conditions, 853 events. 446/853 cut-off events. For 7895/7895 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4435 event pairs, 71 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 5033. Up to 730 conditions per place. [2023-08-26 13:10:37,422 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 161 selfloop transitions, 34 changer transitions 16/211 dead transitions. [2023-08-26 13:10:37,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 211 transitions, 2514 flow [2023-08-26 13:10:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:10:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:10:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1036 transitions. [2023-08-26 13:10:37,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924242424242424 [2023-08-26 13:10:37,425 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1036 transitions. [2023-08-26 13:10:37,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1036 transitions. [2023-08-26 13:10:37,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:37,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1036 transitions. [2023-08-26 13:10:37,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.75) internal successors, (1036), 16 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:37,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:37,457 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:37,458 INFO L175 Difference]: Start difference. First operand has 144 places, 142 transitions, 1580 flow. Second operand 16 states and 1036 transitions. [2023-08-26 13:10:37,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 211 transitions, 2514 flow [2023-08-26 13:10:37,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 211 transitions, 1905 flow, removed 216 selfloop flow, removed 26 redundant places. [2023-08-26 13:10:37,498 INFO L231 Difference]: Finished difference. Result has 140 places, 165 transitions, 1430 flow [2023-08-26 13:10:37,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1430, PETRI_PLACES=140, PETRI_TRANSITIONS=165} [2023-08-26 13:10:37,499 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2023-08-26 13:10:37,499 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 165 transitions, 1430 flow [2023-08-26 13:10:37,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 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) [2023-08-26 13:10:37,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:37,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:37,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:37,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 13:10:37,706 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:37,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1596765795, now seen corresponding path program 5 times [2023-08-26 13:10:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368481864] [2023-08-26 13:10:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:38,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368481864] [2023-08-26 13:10:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368481864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143164984] [2023-08-26 13:10:38,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:10:38,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:38,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:38,187 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) [2023-08-26 13:10:38,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 13:10:38,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:10:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:38,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:10:38,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:38,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143164984] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:42,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:42,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:10:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009939337] [2023-08-26 13:10:42,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:42,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:10:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:42,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:10:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:10:42,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:42,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 165 transitions, 1430 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:42,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:42,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:42,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:44,186 INFO L124 PetriNetUnfolderBase]: 466/899 cut-off events. [2023-08-26 13:10:44,187 INFO L125 PetriNetUnfolderBase]: For 6543/6543 co-relation queries the response was YES. [2023-08-26 13:10:44,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 899 events. 466/899 cut-off events. For 6543/6543 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4795 event pairs, 73 based on Foata normal form. 2/889 useless extension candidates. Maximal degree in co-relation 4761. Up to 739 conditions per place. [2023-08-26 13:10:44,196 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 153 selfloop transitions, 47 changer transitions 16/216 dead transitions. [2023-08-26 13:10:44,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 216 transitions, 2237 flow [2023-08-26 13:10:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 13:10:44,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 13:10:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1149 transitions. [2023-08-26 13:10:44,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38686868686868686 [2023-08-26 13:10:44,199 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1149 transitions. [2023-08-26 13:10:44,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1149 transitions. [2023-08-26 13:10:44,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:44,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1149 transitions. [2023-08-26 13:10:44,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:44,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:44,204 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:44,204 INFO L175 Difference]: Start difference. First operand has 140 places, 165 transitions, 1430 flow. Second operand 18 states and 1149 transitions. [2023-08-26 13:10:44,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 216 transitions, 2237 flow [2023-08-26 13:10:44,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2095 flow, removed 69 selfloop flow, removed 2 redundant places. [2023-08-26 13:10:44,238 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1640 flow [2023-08-26 13:10:44,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1640, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2023-08-26 13:10:44,238 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 132 predicate places. [2023-08-26 13:10:44,238 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1640 flow [2023-08-26 13:10:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:44,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:44,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:44,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 13:10:44,444 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:44,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1538318201, now seen corresponding path program 4 times [2023-08-26 13:10:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:44,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717183567] [2023-08-26 13:10:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:44,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717183567] [2023-08-26 13:10:44,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717183567] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694185849] [2023-08-26 13:10:44,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:10:44,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:44,696 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) [2023-08-26 13:10:44,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 13:10:44,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:10:44,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:44,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:10:44,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:44,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:47,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694185849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:47,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-26 13:10:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095054172] [2023-08-26 13:10:47,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:47,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 13:10:47,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 13:10:47,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=110, Unknown=1, NotChecked=0, Total=156 [2023-08-26 13:10:47,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:10:47,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1640 flow. Second operand has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:47,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:47,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:10:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:47,562 INFO L124 PetriNetUnfolderBase]: 456/876 cut-off events. [2023-08-26 13:10:47,563 INFO L125 PetriNetUnfolderBase]: For 6921/6921 co-relation queries the response was YES. [2023-08-26 13:10:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4802 conditions, 876 events. 456/876 cut-off events. For 6921/6921 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4662 event pairs, 68 based on Foata normal form. 4/868 useless extension candidates. Maximal degree in co-relation 4752. Up to 753 conditions per place. [2023-08-26 13:10:47,569 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 155 selfloop transitions, 26 changer transitions 30/215 dead transitions. [2023-08-26 13:10:47,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 215 transitions, 2296 flow [2023-08-26 13:10:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:10:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:10:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 806 transitions. [2023-08-26 13:10:47,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440771349862259 [2023-08-26 13:10:47,571 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 806 transitions. [2023-08-26 13:10:47,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 806 transitions. [2023-08-26 13:10:47,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:47,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 806 transitions. [2023-08-26 13:10:47,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 73.27272727272727) internal successors, (806), 11 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:47,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 165.0) internal successors, (1980), 12 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:47,574 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 165.0) internal successors, (1980), 12 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:47,574 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1640 flow. Second operand 11 states and 806 transitions. [2023-08-26 13:10:47,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 215 transitions, 2296 flow [2023-08-26 13:10:47,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 215 transitions, 2137 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-08-26 13:10:47,610 INFO L231 Difference]: Finished difference. Result has 160 places, 171 transitions, 1510 flow [2023-08-26 13:10:47,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1510, PETRI_PLACES=160, PETRI_TRANSITIONS=171} [2023-08-26 13:10:47,611 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 132 predicate places. [2023-08-26 13:10:47,611 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 171 transitions, 1510 flow [2023-08-26 13:10:47,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:47,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:47,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:47,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:47,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:47,819 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:47,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1344004749, now seen corresponding path program 6 times [2023-08-26 13:10:47,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:47,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787217905] [2023-08-26 13:10:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:47,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:48,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:48,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787217905] [2023-08-26 13:10:48,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787217905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:48,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201043581] [2023-08-26 13:10:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:10:48,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:48,349 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) [2023-08-26 13:10:48,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 13:10:48,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:10:48,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:10:48,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:10:48,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:48,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201043581] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:53,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:10:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660679977] [2023-08-26 13:10:53,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:53,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:10:53,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:10:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:10:53,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:53,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 171 transitions, 1510 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:53,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:53,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:53,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:10:54,613 INFO L124 PetriNetUnfolderBase]: 504/945 cut-off events. [2023-08-26 13:10:54,613 INFO L125 PetriNetUnfolderBase]: For 7669/7669 co-relation queries the response was YES. [2023-08-26 13:10:54,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5326 conditions, 945 events. 504/945 cut-off events. For 7669/7669 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4968 event pairs, 72 based on Foata normal form. 2/933 useless extension candidates. Maximal degree in co-relation 5274. Up to 819 conditions per place. [2023-08-26 13:10:54,621 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 175 selfloop transitions, 46 changer transitions 10/231 dead transitions. [2023-08-26 13:10:54,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 231 transitions, 2543 flow [2023-08-26 13:10:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:10:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:10:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1208 transitions. [2023-08-26 13:10:54,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853269537480064 [2023-08-26 13:10:54,623 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1208 transitions. [2023-08-26 13:10:54,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1208 transitions. [2023-08-26 13:10:54,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:10:54,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1208 transitions. [2023-08-26 13:10:54,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 63.578947368421055) internal successors, (1208), 19 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) [2023-08-26 13:10:54,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:54,629 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:54,629 INFO L175 Difference]: Start difference. First operand has 160 places, 171 transitions, 1510 flow. Second operand 19 states and 1208 transitions. [2023-08-26 13:10:54,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 231 transitions, 2543 flow [2023-08-26 13:10:54,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 231 transitions, 2449 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-26 13:10:54,665 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 1935 flow [2023-08-26 13:10:54,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1935, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2023-08-26 13:10:54,665 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 140 predicate places. [2023-08-26 13:10:54,665 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 1935 flow [2023-08-26 13:10:54,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:10:54,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:10:54,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:10:54,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 13:10:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:54,871 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:10:54,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:10:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1617408075, now seen corresponding path program 7 times [2023-08-26 13:10:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:10:54,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107160980] [2023-08-26 13:10:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:10:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:10:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:55,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:10:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107160980] [2023-08-26 13:10:55,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107160980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:10:55,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997789913] [2023-08-26 13:10:55,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:10:55,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:10:55,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:10:55,308 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) [2023-08-26 13:10:55,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 13:10:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:10:55,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:10:55,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:10:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:55,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:10:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:10:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997789913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:10:59,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:10:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:10:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970942353] [2023-08-26 13:10:59,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:10:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:10:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:10:59,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:10:59,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:10:59,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:10:59,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 1935 flow. Second operand has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 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) [2023-08-26 13:10:59,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:10:59,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:10:59,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:00,554 INFO L124 PetriNetUnfolderBase]: 503/948 cut-off events. [2023-08-26 13:11:00,554 INFO L125 PetriNetUnfolderBase]: For 8939/8939 co-relation queries the response was YES. [2023-08-26 13:11:00,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5482 conditions, 948 events. 503/948 cut-off events. For 8939/8939 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5013 event pairs, 71 based on Foata normal form. 2/936 useless extension candidates. Maximal degree in co-relation 5429. Up to 785 conditions per place. [2023-08-26 13:11:00,565 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 170 selfloop transitions, 55 changer transitions 10/235 dead transitions. [2023-08-26 13:11:00,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 2592 flow [2023-08-26 13:11:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:11:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:11:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1094 transitions. [2023-08-26 13:11:00,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39001782531194296 [2023-08-26 13:11:00,568 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1094 transitions. [2023-08-26 13:11:00,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1094 transitions. [2023-08-26 13:11:00,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:00,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1094 transitions. [2023-08-26 13:11:00,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 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) [2023-08-26 13:11:00,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:00,573 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:00,573 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 1935 flow. Second operand 17 states and 1094 transitions. [2023-08-26 13:11:00,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 2592 flow [2023-08-26 13:11:00,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 235 transitions, 2380 flow, removed 87 selfloop flow, removed 11 redundant places. [2023-08-26 13:11:00,620 INFO L231 Difference]: Finished difference. Result has 174 places, 196 transitions, 1916 flow [2023-08-26 13:11:00,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1916, PETRI_PLACES=174, PETRI_TRANSITIONS=196} [2023-08-26 13:11:00,621 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 146 predicate places. [2023-08-26 13:11:00,621 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 196 transitions, 1916 flow [2023-08-26 13:11:00,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 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) [2023-08-26 13:11:00,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:00,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:00,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-26 13:11:00,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:00,827 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:00,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash 987588193, now seen corresponding path program 8 times [2023-08-26 13:11:00,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:00,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566312807] [2023-08-26 13:11:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:00,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:01,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566312807] [2023-08-26 13:11:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566312807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:01,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097161552] [2023-08-26 13:11:01,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:11:01,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:01,301 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) [2023-08-26 13:11:01,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 13:11:01,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:11:01,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:01,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:01,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:01,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097161552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:05,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:05,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:05,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579284695] [2023-08-26 13:11:05,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:05,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:05,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:05,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:05,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:05,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:05,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 196 transitions, 1916 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:05,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:05,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:05,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:07,455 INFO L124 PetriNetUnfolderBase]: 497/946 cut-off events. [2023-08-26 13:11:07,455 INFO L125 PetriNetUnfolderBase]: For 8317/8317 co-relation queries the response was YES. [2023-08-26 13:11:07,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5399 conditions, 946 events. 497/946 cut-off events. For 8317/8317 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5035 event pairs, 74 based on Foata normal form. 2/932 useless extension candidates. Maximal degree in co-relation 5344. Up to 820 conditions per place. [2023-08-26 13:11:07,463 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 182 selfloop transitions, 49 changer transitions 8/239 dead transitions. [2023-08-26 13:11:07,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 239 transitions, 2648 flow [2023-08-26 13:11:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 13:11:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 13:11:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1334 transitions. [2023-08-26 13:11:07,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384992784992785 [2023-08-26 13:11:07,466 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1334 transitions. [2023-08-26 13:11:07,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1334 transitions. [2023-08-26 13:11:07,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:07,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1334 transitions. [2023-08-26 13:11:07,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.523809523809526) internal successors, (1334), 21 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:07,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:07,471 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:07,472 INFO L175 Difference]: Start difference. First operand has 174 places, 196 transitions, 1916 flow. Second operand 21 states and 1334 transitions. [2023-08-26 13:11:07,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 239 transitions, 2648 flow [2023-08-26 13:11:07,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 239 transitions, 2491 flow, removed 48 selfloop flow, removed 14 redundant places. [2023-08-26 13:11:07,503 INFO L231 Difference]: Finished difference. Result has 182 places, 201 transitions, 1989 flow [2023-08-26 13:11:07,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1989, PETRI_PLACES=182, PETRI_TRANSITIONS=201} [2023-08-26 13:11:07,503 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 154 predicate places. [2023-08-26 13:11:07,504 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 201 transitions, 1989 flow [2023-08-26 13:11:07,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:07,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:07,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:07,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 13:11:07,705 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:07,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash -728971575, now seen corresponding path program 9 times [2023-08-26 13:11:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:07,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91457264] [2023-08-26 13:11:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:07,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:08,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:08,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91457264] [2023-08-26 13:11:08,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91457264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:08,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227904001] [2023-08-26 13:11:08,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:11:08,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:08,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:08,280 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) [2023-08-26 13:11:08,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 13:11:08,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:11:08,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:08,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:08,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:08,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227904001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:11,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203825916] [2023-08-26 13:11:11,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:11,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:11,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:11,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 201 transitions, 1989 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:11,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:11,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:11,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:13,822 INFO L124 PetriNetUnfolderBase]: 499/959 cut-off events. [2023-08-26 13:11:13,822 INFO L125 PetriNetUnfolderBase]: For 8350/8350 co-relation queries the response was YES. [2023-08-26 13:11:13,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5486 conditions, 959 events. 499/959 cut-off events. For 8350/8350 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5171 event pairs, 78 based on Foata normal form. 3/946 useless extension candidates. Maximal degree in co-relation 5430. Up to 878 conditions per place. [2023-08-26 13:11:13,831 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 190 selfloop transitions, 35 changer transitions 8/233 dead transitions. [2023-08-26 13:11:13,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 233 transitions, 2639 flow [2023-08-26 13:11:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:11:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:11:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1076 transitions. [2023-08-26 13:11:13,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3836007130124777 [2023-08-26 13:11:13,834 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1076 transitions. [2023-08-26 13:11:13,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1076 transitions. [2023-08-26 13:11:13,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:13,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1076 transitions. [2023-08-26 13:11:13,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.294117647058826) internal successors, (1076), 17 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:13,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:13,839 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:13,839 INFO L175 Difference]: Start difference. First operand has 182 places, 201 transitions, 1989 flow. Second operand 17 states and 1076 transitions. [2023-08-26 13:11:13,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 233 transitions, 2639 flow [2023-08-26 13:11:13,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 233 transitions, 2451 flow, removed 62 selfloop flow, removed 16 redundant places. [2023-08-26 13:11:13,878 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 1975 flow [2023-08-26 13:11:13,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1975, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2023-08-26 13:11:13,879 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 158 predicate places. [2023-08-26 13:11:13,879 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1975 flow [2023-08-26 13:11:13,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:13,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:13,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:13,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:14,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:14,085 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:14,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:14,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1961337369, now seen corresponding path program 10 times [2023-08-26 13:11:14,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:14,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955191748] [2023-08-26 13:11:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:14,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955191748] [2023-08-26 13:11:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955191748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:14,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753574931] [2023-08-26 13:11:14,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:11:14,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:14,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:14,537 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) [2023-08-26 13:11:14,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 13:11:14,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:11:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:14,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:14,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:14,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:18,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753574931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:18,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:18,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398198657] [2023-08-26 13:11:18,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:18,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:18,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1975 flow. Second operand has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:18,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:18,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:18,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:19,548 INFO L124 PetriNetUnfolderBase]: 525/996 cut-off events. [2023-08-26 13:11:19,549 INFO L125 PetriNetUnfolderBase]: For 8602/8602 co-relation queries the response was YES. [2023-08-26 13:11:19,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 996 events. 525/996 cut-off events. For 8602/8602 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5356 event pairs, 70 based on Foata normal form. 2/980 useless extension candidates. Maximal degree in co-relation 5768. Up to 887 conditions per place. [2023-08-26 13:11:19,557 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 209 selfloop transitions, 38 changer transitions 11/258 dead transitions. [2023-08-26 13:11:19,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 258 transitions, 2910 flow [2023-08-26 13:11:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:11:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:11:19,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1092 transitions. [2023-08-26 13:11:19,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893048128342246 [2023-08-26 13:11:19,559 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1092 transitions. [2023-08-26 13:11:19,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1092 transitions. [2023-08-26 13:11:19,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:19,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1092 transitions. [2023-08-26 13:11:19,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.23529411764706) internal successors, (1092), 17 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) [2023-08-26 13:11:19,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,564 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,564 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 1975 flow. Second operand 17 states and 1092 transitions. [2023-08-26 13:11:19,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 258 transitions, 2910 flow [2023-08-26 13:11:19,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 258 transitions, 2811 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-08-26 13:11:19,603 INFO L231 Difference]: Finished difference. Result has 195 places, 218 transitions, 2240 flow [2023-08-26 13:11:19,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2240, PETRI_PLACES=195, PETRI_TRANSITIONS=218} [2023-08-26 13:11:19,604 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 167 predicate places. [2023-08-26 13:11:19,604 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 218 transitions, 2240 flow [2023-08-26 13:11:19,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:19,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:19,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:19,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:19,810 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:19,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1056284441, now seen corresponding path program 11 times [2023-08-26 13:11:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492081226] [2023-08-26 13:11:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:20,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492081226] [2023-08-26 13:11:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492081226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398500751] [2023-08-26 13:11:20,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:11:20,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:20,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:20,321 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) [2023-08-26 13:11:20,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 13:11:20,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:11:20,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:20,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:20,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:20,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:23,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398500751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:23,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:23,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576280175] [2023-08-26 13:11:23,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:23,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:23,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:23,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:23,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 218 transitions, 2240 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:23,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:23,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:23,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:24,615 INFO L124 PetriNetUnfolderBase]: 549/1046 cut-off events. [2023-08-26 13:11:24,616 INFO L125 PetriNetUnfolderBase]: For 12294/12294 co-relation queries the response was YES. [2023-08-26 13:11:24,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6514 conditions, 1046 events. 549/1046 cut-off events. For 12294/12294 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5731 event pairs, 76 based on Foata normal form. 2/1030 useless extension candidates. Maximal degree in co-relation 6451. Up to 886 conditions per place. [2023-08-26 13:11:24,623 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 202 selfloop transitions, 53 changer transitions 11/266 dead transitions. [2023-08-26 13:11:24,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 266 transitions, 3248 flow [2023-08-26 13:11:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 13:11:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 13:11:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1270 transitions. [2023-08-26 13:11:24,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2023-08-26 13:11:24,625 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1270 transitions. [2023-08-26 13:11:24,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1270 transitions. [2023-08-26 13:11:24,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:24,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1270 transitions. [2023-08-26 13:11:24,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.5) internal successors, (1270), 20 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:24,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:24,630 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:24,630 INFO L175 Difference]: Start difference. First operand has 195 places, 218 transitions, 2240 flow. Second operand 20 states and 1270 transitions. [2023-08-26 13:11:24,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 266 transitions, 3248 flow [2023-08-26 13:11:24,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2998 flow, removed 103 selfloop flow, removed 11 redundant places. [2023-08-26 13:11:24,688 INFO L231 Difference]: Finished difference. Result has 207 places, 228 transitions, 2422 flow [2023-08-26 13:11:24,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2422, PETRI_PLACES=207, PETRI_TRANSITIONS=228} [2023-08-26 13:11:24,689 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 179 predicate places. [2023-08-26 13:11:24,689 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 228 transitions, 2422 flow [2023-08-26 13:11:24,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:24,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:24,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:24,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:24,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:24,893 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:24,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1665522661, now seen corresponding path program 12 times [2023-08-26 13:11:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:24,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589624150] [2023-08-26 13:11:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:25,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:25,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589624150] [2023-08-26 13:11:25,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589624150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:25,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265574551] [2023-08-26 13:11:25,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:11:25,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:25,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:25,211 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) [2023-08-26 13:11:25,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 13:11:25,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:11:25,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:25,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:25,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:25,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:26,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265574551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:26,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:26,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 13:11:26,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274683740] [2023-08-26 13:11:26,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:26,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:11:26,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:26,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:11:26,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:11:26,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:26,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 228 transitions, 2422 flow. Second operand has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:26,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:26,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:26,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:27,607 INFO L124 PetriNetUnfolderBase]: 611/1167 cut-off events. [2023-08-26 13:11:27,608 INFO L125 PetriNetUnfolderBase]: For 16430/16430 co-relation queries the response was YES. [2023-08-26 13:11:27,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7420 conditions, 1167 events. 611/1167 cut-off events. For 16430/16430 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6612 event pairs, 78 based on Foata normal form. 3/1154 useless extension candidates. Maximal degree in co-relation 7356. Up to 937 conditions per place. [2023-08-26 13:11:27,616 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 220 selfloop transitions, 71 changer transitions 21/312 dead transitions. [2023-08-26 13:11:27,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4004 flow [2023-08-26 13:11:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:11:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 13:11:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1412 transitions. [2023-08-26 13:11:27,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38898071625344355 [2023-08-26 13:11:27,618 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1412 transitions. [2023-08-26 13:11:27,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1412 transitions. [2023-08-26 13:11:27,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:27,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1412 transitions. [2023-08-26 13:11:27,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.18181818181819) internal successors, (1412), 22 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:27,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:27,623 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:27,623 INFO L175 Difference]: Start difference. First operand has 207 places, 228 transitions, 2422 flow. Second operand 22 states and 1412 transitions. [2023-08-26 13:11:27,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4004 flow [2023-08-26 13:11:27,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 312 transitions, 3754 flow, removed 95 selfloop flow, removed 16 redundant places. [2023-08-26 13:11:27,679 INFO L231 Difference]: Finished difference. Result has 214 places, 259 transitions, 2979 flow [2023-08-26 13:11:27,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2979, PETRI_PLACES=214, PETRI_TRANSITIONS=259} [2023-08-26 13:11:27,679 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 186 predicate places. [2023-08-26 13:11:27,679 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 259 transitions, 2979 flow [2023-08-26 13:11:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:27,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:27,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:27,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:27,885 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,SelfDestructingSolverStorable25 [2023-08-26 13:11:27,886 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:27,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1508407487, now seen corresponding path program 13 times [2023-08-26 13:11:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:27,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128192480] [2023-08-26 13:11:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:28,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:28,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128192480] [2023-08-26 13:11:28,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128192480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571969870] [2023-08-26 13:11:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:11:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:28,317 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) [2023-08-26 13:11:28,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 13:11:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:28,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:28,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:28,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571969870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:32,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:32,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:32,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663302414] [2023-08-26 13:11:32,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:32,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:32,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:32,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:32,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 259 transitions, 2979 flow. Second operand has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:32,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:32,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:32,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:33,201 INFO L124 PetriNetUnfolderBase]: 630/1185 cut-off events. [2023-08-26 13:11:33,201 INFO L125 PetriNetUnfolderBase]: For 16508/16508 co-relation queries the response was YES. [2023-08-26 13:11:33,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1185 events. 630/1185 cut-off events. For 16508/16508 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6637 event pairs, 78 based on Foata normal form. 2/1169 useless extension candidates. Maximal degree in co-relation 7819. Up to 1043 conditions per place. [2023-08-26 13:11:33,210 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 242 selfloop transitions, 52 changer transitions 10/304 dead transitions. [2023-08-26 13:11:33,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 304 transitions, 4204 flow [2023-08-26 13:11:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:11:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:11:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1021 transitions. [2023-08-26 13:11:33,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867424242424242 [2023-08-26 13:11:33,214 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1021 transitions. [2023-08-26 13:11:33,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1021 transitions. [2023-08-26 13:11:33,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:33,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1021 transitions. [2023-08-26 13:11:33,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:33,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:33,219 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:33,219 INFO L175 Difference]: Start difference. First operand has 214 places, 259 transitions, 2979 flow. Second operand 16 states and 1021 transitions. [2023-08-26 13:11:33,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 304 transitions, 4204 flow [2023-08-26 13:11:33,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 304 transitions, 3696 flow, removed 242 selfloop flow, removed 9 redundant places. [2023-08-26 13:11:33,284 INFO L231 Difference]: Finished difference. Result has 223 places, 272 transitions, 3008 flow [2023-08-26 13:11:33,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3008, PETRI_PLACES=223, PETRI_TRANSITIONS=272} [2023-08-26 13:11:33,284 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 195 predicate places. [2023-08-26 13:11:33,284 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 272 transitions, 3008 flow [2023-08-26 13:11:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:33,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:33,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:33,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:33,485 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,SelfDestructingSolverStorable26 [2023-08-26 13:11:33,485 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:33,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash -932546927, now seen corresponding path program 14 times [2023-08-26 13:11:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:33,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785250906] [2023-08-26 13:11:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785250906] [2023-08-26 13:11:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785250906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507085970] [2023-08-26 13:11:33,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:11:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:33,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:33,937 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) [2023-08-26 13:11:33,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 13:11:34,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:11:34,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:34,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:34,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:34,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:35,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507085970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:35,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 13:11:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428645277] [2023-08-26 13:11:35,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:11:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:11:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:11:35,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:35,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 272 transitions, 3008 flow. Second operand has 19 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:35,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:35,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:35,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:36,975 INFO L124 PetriNetUnfolderBase]: 671/1266 cut-off events. [2023-08-26 13:11:36,975 INFO L125 PetriNetUnfolderBase]: For 21687/21687 co-relation queries the response was YES. [2023-08-26 13:11:36,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8620 conditions, 1266 events. 671/1266 cut-off events. For 21687/21687 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7236 event pairs, 72 based on Foata normal form. 3/1245 useless extension candidates. Maximal degree in co-relation 8554. Up to 996 conditions per place. [2023-08-26 13:11:36,984 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 234 selfloop transitions, 91 changer transitions 16/341 dead transitions. [2023-08-26 13:11:36,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 341 transitions, 4503 flow [2023-08-26 13:11:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:11:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:11:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1540 transitions. [2023-08-26 13:11:36,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 13:11:36,987 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1540 transitions. [2023-08-26 13:11:36,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1540 transitions. [2023-08-26 13:11:36,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:36,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1540 transitions. [2023-08-26 13:11:36,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.16666666666667) internal successors, (1540), 24 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) [2023-08-26 13:11:36,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:36,993 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:36,993 INFO L175 Difference]: Start difference. First operand has 223 places, 272 transitions, 3008 flow. Second operand 24 states and 1540 transitions. [2023-08-26 13:11:36,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 341 transitions, 4503 flow [2023-08-26 13:11:37,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 341 transitions, 4194 flow, removed 131 selfloop flow, removed 9 redundant places. [2023-08-26 13:11:37,080 INFO L231 Difference]: Finished difference. Result has 238 places, 286 transitions, 3343 flow [2023-08-26 13:11:37,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3343, PETRI_PLACES=238, PETRI_TRANSITIONS=286} [2023-08-26 13:11:37,081 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 210 predicate places. [2023-08-26 13:11:37,081 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 286 transitions, 3343 flow [2023-08-26 13:11:37,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:37,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:37,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:37,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:37,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 13:11:37,287 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:37,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash 515271591, now seen corresponding path program 15 times [2023-08-26 13:11:37,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:37,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499116015] [2023-08-26 13:11:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:37,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:37,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:37,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499116015] [2023-08-26 13:11:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499116015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524515280] [2023-08-26 13:11:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:11:37,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:37,574 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) [2023-08-26 13:11:37,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 13:11:37,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:11:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:37,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:37,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:37,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:38,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524515280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:38,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:38,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 13:11:38,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312218420] [2023-08-26 13:11:38,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:38,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:11:38,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:11:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-26 13:11:38,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:38,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 286 transitions, 3343 flow. Second operand has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:38,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:38,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:38,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:40,255 INFO L124 PetriNetUnfolderBase]: 668/1269 cut-off events. [2023-08-26 13:11:40,256 INFO L125 PetriNetUnfolderBase]: For 22154/22154 co-relation queries the response was YES. [2023-08-26 13:11:40,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8587 conditions, 1269 events. 668/1269 cut-off events. For 22154/22154 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7329 event pairs, 68 based on Foata normal form. 3/1246 useless extension candidates. Maximal degree in co-relation 8520. Up to 1079 conditions per place. [2023-08-26 13:11:40,269 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 255 selfloop transitions, 68 changer transitions 19/342 dead transitions. [2023-08-26 13:11:40,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 342 transitions, 4403 flow [2023-08-26 13:11:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:11:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:11:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1465 transitions. [2023-08-26 13:11:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38603425559947296 [2023-08-26 13:11:40,272 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1465 transitions. [2023-08-26 13:11:40,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1465 transitions. [2023-08-26 13:11:40,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:40,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1465 transitions. [2023-08-26 13:11:40,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.69565217391305) internal successors, (1465), 23 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:40,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:40,277 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:40,277 INFO L175 Difference]: Start difference. First operand has 238 places, 286 transitions, 3343 flow. Second operand 23 states and 1465 transitions. [2023-08-26 13:11:40,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 342 transitions, 4403 flow [2023-08-26 13:11:40,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 342 transitions, 3933 flow, removed 204 selfloop flow, removed 10 redundant places. [2023-08-26 13:11:40,380 INFO L231 Difference]: Finished difference. Result has 255 places, 291 transitions, 3232 flow [2023-08-26 13:11:40,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3232, PETRI_PLACES=255, PETRI_TRANSITIONS=291} [2023-08-26 13:11:40,383 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 227 predicate places. [2023-08-26 13:11:40,383 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 291 transitions, 3232 flow [2023-08-26 13:11:40,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:40,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:40,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:40,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:40,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:40,589 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:40,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:40,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1076926721, now seen corresponding path program 16 times [2023-08-26 13:11:40,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:40,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842545088] [2023-08-26 13:11:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:40,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842545088] [2023-08-26 13:11:40,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842545088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:40,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600583035] [2023-08-26 13:11:40,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:11:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:40,921 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) [2023-08-26 13:11:40,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 13:11:40,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:11:40,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:40,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:40,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:41,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:44,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600583035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:44,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:44,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:44,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463143143] [2023-08-26 13:11:44,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:44,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:44,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:44,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:44,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 291 transitions, 3232 flow. Second operand has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 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) [2023-08-26 13:11:44,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:44,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:46,190 INFO L124 PetriNetUnfolderBase]: 668/1268 cut-off events. [2023-08-26 13:11:46,190 INFO L125 PetriNetUnfolderBase]: For 17963/17963 co-relation queries the response was YES. [2023-08-26 13:11:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8220 conditions, 1268 events. 668/1268 cut-off events. For 17963/17963 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7314 event pairs, 70 based on Foata normal form. 2/1244 useless extension candidates. Maximal degree in co-relation 8144. Up to 1111 conditions per place. [2023-08-26 13:11:46,200 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 275 selfloop transitions, 54 changer transitions 10/339 dead transitions. [2023-08-26 13:11:46,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 339 transitions, 4163 flow [2023-08-26 13:11:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:11:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 13:11:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1404 transitions. [2023-08-26 13:11:46,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867768595041322 [2023-08-26 13:11:46,204 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1404 transitions. [2023-08-26 13:11:46,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1404 transitions. [2023-08-26 13:11:46,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:46,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1404 transitions. [2023-08-26 13:11:46,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.81818181818182) internal successors, (1404), 22 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:46,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:46,208 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:46,208 INFO L175 Difference]: Start difference. First operand has 255 places, 291 transitions, 3232 flow. Second operand 22 states and 1404 transitions. [2023-08-26 13:11:46,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 339 transitions, 4163 flow [2023-08-26 13:11:46,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 339 transitions, 4036 flow, removed 31 selfloop flow, removed 15 redundant places. [2023-08-26 13:11:46,311 INFO L231 Difference]: Finished difference. Result has 261 places, 294 transitions, 3338 flow [2023-08-26 13:11:46,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3338, PETRI_PLACES=261, PETRI_TRANSITIONS=294} [2023-08-26 13:11:46,312 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 233 predicate places. [2023-08-26 13:11:46,312 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 294 transitions, 3338 flow [2023-08-26 13:11:46,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 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) [2023-08-26 13:11:46,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:46,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:46,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:46,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:46,518 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:46,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:46,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1528069547, now seen corresponding path program 17 times [2023-08-26 13:11:46,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:46,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661835892] [2023-08-26 13:11:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:46,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:47,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:47,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661835892] [2023-08-26 13:11:47,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661835892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:47,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842033340] [2023-08-26 13:11:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:11:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:47,267 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) [2023-08-26 13:11:47,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 13:11:47,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:11:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:47,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:11:47,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:47,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:50,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842033340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:50,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:50,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:11:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495457488] [2023-08-26 13:11:50,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:50,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:11:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:11:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:11:50,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:50,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 294 transitions, 3338 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:50,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:50,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:50,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:11:52,474 INFO L124 PetriNetUnfolderBase]: 662/1266 cut-off events. [2023-08-26 13:11:52,475 INFO L125 PetriNetUnfolderBase]: For 18077/18077 co-relation queries the response was YES. [2023-08-26 13:11:52,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8279 conditions, 1266 events. 662/1266 cut-off events. For 18077/18077 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7340 event pairs, 78 based on Foata normal form. 2/1242 useless extension candidates. Maximal degree in co-relation 8202. Up to 1124 conditions per place. [2023-08-26 13:11:52,485 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 267 selfloop transitions, 55 changer transitions 8/330 dead transitions. [2023-08-26 13:11:52,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 330 transitions, 4291 flow [2023-08-26 13:11:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:11:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:11:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1086 transitions. [2023-08-26 13:11:52,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871657754010695 [2023-08-26 13:11:52,494 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1086 transitions. [2023-08-26 13:11:52,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1086 transitions. [2023-08-26 13:11:52,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:11:52,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1086 transitions. [2023-08-26 13:11:52,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.88235294117647) internal successors, (1086), 17 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:52,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:52,498 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:52,498 INFO L175 Difference]: Start difference. First operand has 261 places, 294 transitions, 3338 flow. Second operand 17 states and 1086 transitions. [2023-08-26 13:11:52,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 330 transitions, 4291 flow [2023-08-26 13:11:52,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 330 transitions, 4071 flow, removed 76 selfloop flow, removed 19 redundant places. [2023-08-26 13:11:52,595 INFO L231 Difference]: Finished difference. Result has 260 places, 299 transitions, 3406 flow [2023-08-26 13:11:52,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3406, PETRI_PLACES=260, PETRI_TRANSITIONS=299} [2023-08-26 13:11:52,596 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 232 predicate places. [2023-08-26 13:11:52,596 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 299 transitions, 3406 flow [2023-08-26 13:11:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:52,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:11:52,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:11:52,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-26 13:11:52,797 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,SelfDestructingSolverStorable30 [2023-08-26 13:11:52,797 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:11:52,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:11:52,797 INFO L85 PathProgramCache]: Analyzing trace with hash -448827175, now seen corresponding path program 18 times [2023-08-26 13:11:52,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:11:52,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316479489] [2023-08-26 13:11:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:11:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:11:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:11:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:53,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:11:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316479489] [2023-08-26 13:11:53,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316479489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:11:53,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020659382] [2023-08-26 13:11:53,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:11:53,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:11:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:11:53,666 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) [2023-08-26 13:11:53,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 13:11:53,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:11:53,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:11:53,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:11:53,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:11:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:11:54,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:11:56,748 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* (div (+ (mod c_~x_2~0 4294967296) (- 4294967294)) 4294967296) 4294967296)) (.cse0 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse2 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296))) (and (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse1 (* 2 v_z_266))) (< (+ .cse1 c_~x_1~0 .cse2) (+ c_~x_2~0 3 (* (div (+ .cse1 c_~x_1~0) 4294967296) 4294967296)))) (<= v_z_266 .cse3))) (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse4 (* 2 v_z_266))) (< (+ c_~x_2~0 (* (div (+ .cse4 c_~x_1~0) 4294967296) 4294967296)) (+ .cse4 c_~x_1~0 4294967295 .cse5 .cse2))) (<= v_z_266 .cse3))) (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse6 (* 2 v_z_266))) (< (+ .cse6 c_~x_1~0 .cse5 .cse2 4294967293) (+ c_~x_2~0 (* (div (+ .cse6 c_~x_1~0) 4294967296) 4294967296)))) (<= v_z_266 .cse3))) (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse7 (* 2 v_z_266))) (< (+ c_~x_2~0 (* (div (+ .cse7 c_~x_1~0) 4294967296) 4294967296)) (+ .cse7 c_~x_1~0 4294967295 .cse2))) (<= v_z_266 .cse3))))) is different from false [2023-08-26 13:11:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 13:11:56,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020659382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:11:56,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:11:56,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-26 13:11:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486863910] [2023-08-26 13:11:56,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:11:56,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:11:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:11:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:11:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=331, Unknown=1, NotChecked=38, Total=462 [2023-08-26 13:11:56,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:11:56,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 299 transitions, 3406 flow. Second operand has 22 states, 22 states have (on average 60.72727272727273) internal successors, (1336), 22 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:11:56,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:11:56,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:11:56,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:06,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:10,880 INFO L124 PetriNetUnfolderBase]: 736/1415 cut-off events. [2023-08-26 13:12:10,880 INFO L125 PetriNetUnfolderBase]: For 24896/24896 co-relation queries the response was YES. [2023-08-26 13:12:10,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9828 conditions, 1415 events. 736/1415 cut-off events. For 24896/24896 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 8427 event pairs, 70 based on Foata normal form. 4/1393 useless extension candidates. Maximal degree in co-relation 9750. Up to 1027 conditions per place. [2023-08-26 13:12:10,891 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 254 selfloop transitions, 131 changer transitions 18/403 dead transitions. [2023-08-26 13:12:10,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 403 transitions, 5530 flow [2023-08-26 13:12:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-26 13:12:10,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-26 13:12:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2045 transitions. [2023-08-26 13:12:10,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3873106060606061 [2023-08-26 13:12:10,895 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2045 transitions. [2023-08-26 13:12:10,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2045 transitions. [2023-08-26 13:12:10,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:10,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2045 transitions. [2023-08-26 13:12:10,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 63.90625) internal successors, (2045), 32 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:10,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 165.0) internal successors, (5445), 33 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:10,902 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 165.0) internal successors, (5445), 33 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:10,902 INFO L175 Difference]: Start difference. First operand has 260 places, 299 transitions, 3406 flow. Second operand 32 states and 2045 transitions. [2023-08-26 13:12:10,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 403 transitions, 5530 flow [2023-08-26 13:12:11,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 403 transitions, 5263 flow, removed 99 selfloop flow, removed 14 redundant places. [2023-08-26 13:12:11,012 INFO L231 Difference]: Finished difference. Result has 283 places, 332 transitions, 4395 flow [2023-08-26 13:12:11,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3152, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4395, PETRI_PLACES=283, PETRI_TRANSITIONS=332} [2023-08-26 13:12:11,012 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 255 predicate places. [2023-08-26 13:12:11,012 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 332 transitions, 4395 flow [2023-08-26 13:12:11,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.72727272727273) internal successors, (1336), 22 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:11,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:11,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:11,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 13:12:11,214 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,SelfDestructingSolverStorable31 [2023-08-26 13:12:11,214 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:11,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash -188490221, now seen corresponding path program 19 times [2023-08-26 13:12:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:11,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745323550] [2023-08-26 13:12:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:11,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:11,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:11,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745323550] [2023-08-26 13:12:11,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745323550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:11,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779185297] [2023-08-26 13:12:11,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:12:11,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:11,553 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) [2023-08-26 13:12:11,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 13:12:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:11,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 13:12:11,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:11,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:14,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779185297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:14,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:14,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 13:12:14,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602840019] [2023-08-26 13:12:14,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:14,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:12:14,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:12:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-26 13:12:14,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:12:14,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 332 transitions, 4395 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:14,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:14,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:12:14,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:15,285 INFO L124 PetriNetUnfolderBase]: 730/1410 cut-off events. [2023-08-26 13:12:15,285 INFO L125 PetriNetUnfolderBase]: For 25107/25107 co-relation queries the response was YES. [2023-08-26 13:12:15,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10063 conditions, 1410 events. 730/1410 cut-off events. For 25107/25107 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 8428 event pairs, 86 based on Foata normal form. 3/1387 useless extension candidates. Maximal degree in co-relation 9981. Up to 1329 conditions per place. [2023-08-26 13:12:15,295 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 315 selfloop transitions, 36 changer transitions 8/359 dead transitions. [2023-08-26 13:12:15,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 359 transitions, 5332 flow [2023-08-26 13:12:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:12:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:12:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 950 transitions. [2023-08-26 13:12:15,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2023-08-26 13:12:15,298 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 950 transitions. [2023-08-26 13:12:15,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 950 transitions. [2023-08-26 13:12:15,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:15,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 950 transitions. [2023-08-26 13:12:15,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 63.333333333333336) internal successors, (950), 15 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:15,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:15,301 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:15,302 INFO L175 Difference]: Start difference. First operand has 283 places, 332 transitions, 4395 flow. Second operand 15 states and 950 transitions. [2023-08-26 13:12:15,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 359 transitions, 5332 flow [2023-08-26 13:12:15,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 359 transitions, 4571 flow, removed 329 selfloop flow, removed 18 redundant places. [2023-08-26 13:12:15,428 INFO L231 Difference]: Finished difference. Result has 281 places, 335 transitions, 3811 flow [2023-08-26 13:12:15,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3811, PETRI_PLACES=281, PETRI_TRANSITIONS=335} [2023-08-26 13:12:15,429 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 253 predicate places. [2023-08-26 13:12:15,429 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 335 transitions, 3811 flow [2023-08-26 13:12:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:15,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:15,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:15,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 13:12:15,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:15,630 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:15,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1237609447, now seen corresponding path program 20 times [2023-08-26 13:12:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:15,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614402106] [2023-08-26 13:12:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614402106] [2023-08-26 13:12:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614402106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593929648] [2023-08-26 13:12:16,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:12:16,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:16,144 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) [2023-08-26 13:12:16,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-26 13:12:16,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:12:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:12:16,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:12:16,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:16,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:20,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593929648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:20,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:20,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-26 13:12:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335930612] [2023-08-26 13:12:20,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:12:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:12:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-08-26 13:12:20,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:12:20,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 335 transitions, 3811 flow. Second operand has 21 states, 21 states have (on average 60.80952380952381) internal successors, (1277), 21 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:20,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:20,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:12:20,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:23,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:28,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:31,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:37,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:40,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:43,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:45,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:12:46,661 INFO L124 PetriNetUnfolderBase]: 857/1638 cut-off events. [2023-08-26 13:12:46,661 INFO L125 PetriNetUnfolderBase]: For 37332/37332 co-relation queries the response was YES. [2023-08-26 13:12:46,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12083 conditions, 1638 events. 857/1638 cut-off events. For 37332/37332 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10077 event pairs, 55 based on Foata normal form. 3/1615 useless extension candidates. Maximal degree in co-relation 11999. Up to 1217 conditions per place. [2023-08-26 13:12:46,674 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 334 selfloop transitions, 101 changer transitions 23/458 dead transitions. [2023-08-26 13:12:46,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 458 transitions, 6308 flow [2023-08-26 13:12:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 13:12:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 13:12:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1935 transitions. [2023-08-26 13:12:46,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2023-08-26 13:12:46,677 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1935 transitions. [2023-08-26 13:12:46,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1935 transitions. [2023-08-26 13:12:46,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:46,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1935 transitions. [2023-08-26 13:12:46,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.5) internal successors, (1935), 30 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:46,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 165.0) internal successors, (5115), 31 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:46,682 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 165.0) internal successors, (5115), 31 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:46,682 INFO L175 Difference]: Start difference. First operand has 281 places, 335 transitions, 3811 flow. Second operand 30 states and 1935 transitions. [2023-08-26 13:12:46,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 458 transitions, 6308 flow [2023-08-26 13:12:46,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 458 transitions, 6165 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-08-26 13:12:46,814 INFO L231 Difference]: Finished difference. Result has 305 places, 370 transitions, 4914 flow [2023-08-26 13:12:46,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4914, PETRI_PLACES=305, PETRI_TRANSITIONS=370} [2023-08-26 13:12:46,814 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 277 predicate places. [2023-08-26 13:12:46,814 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 370 transitions, 4914 flow [2023-08-26 13:12:46,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.80952380952381) internal successors, (1277), 21 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:46,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:46,815 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:46,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-26 13:12:47,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:47,015 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:47,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1067676895, now seen corresponding path program 5 times [2023-08-26 13:12:47,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:47,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247704221] [2023-08-26 13:12:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:47,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:47,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:47,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247704221] [2023-08-26 13:12:47,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247704221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:47,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112169760] [2023-08-26 13:12:47,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:12:47,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:47,225 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) [2023-08-26 13:12:47,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-26 13:12:47,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:12:47,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:12:47,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 13:12:47,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:47,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:47,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112169760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:47,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:47,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-08-26 13:12:47,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804500146] [2023-08-26 13:12:47,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:47,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:12:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:12:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:12:47,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:12:47,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 370 transitions, 4914 flow. Second operand has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:47,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:47,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:12:47,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:48,492 INFO L124 PetriNetUnfolderBase]: 845/1633 cut-off events. [2023-08-26 13:12:48,493 INFO L125 PetriNetUnfolderBase]: For 39940/39940 co-relation queries the response was YES. [2023-08-26 13:12:48,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12594 conditions, 1633 events. 845/1633 cut-off events. For 39940/39940 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 10164 event pairs, 48 based on Foata normal form. 5/1614 useless extension candidates. Maximal degree in co-relation 12503. Up to 1350 conditions per place. [2023-08-26 13:12:48,508 INFO L140 encePairwiseOnDemand]: 158/165 looper letters, 332 selfloop transitions, 72 changer transitions 25/429 dead transitions. [2023-08-26 13:12:48,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 429 transitions, 6555 flow [2023-08-26 13:12:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:12:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:12:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1263 transitions. [2023-08-26 13:12:48,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028708133971292 [2023-08-26 13:12:48,510 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1263 transitions. [2023-08-26 13:12:48,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1263 transitions. [2023-08-26 13:12:48,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:12:48,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1263 transitions. [2023-08-26 13:12:48,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.47368421052632) internal successors, (1263), 19 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:48,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:48,514 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:48,514 INFO L175 Difference]: Start difference. First operand has 305 places, 370 transitions, 4914 flow. Second operand 19 states and 1263 transitions. [2023-08-26 13:12:48,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 429 transitions, 6555 flow [2023-08-26 13:12:48,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 429 transitions, 5681 flow, removed 408 selfloop flow, removed 13 redundant places. [2023-08-26 13:12:48,715 INFO L231 Difference]: Finished difference. Result has 309 places, 369 transitions, 4424 flow [2023-08-26 13:12:48,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4424, PETRI_PLACES=309, PETRI_TRANSITIONS=369} [2023-08-26 13:12:48,716 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 281 predicate places. [2023-08-26 13:12:48,716 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 369 transitions, 4424 flow [2023-08-26 13:12:48,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:48,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:12:48,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:12:48,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-26 13:12:48,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:48,917 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:12:48,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:12:48,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1036934931, now seen corresponding path program 21 times [2023-08-26 13:12:48,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:12:48,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173852831] [2023-08-26 13:12:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:12:48,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:12:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:12:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:49,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:12:49,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173852831] [2023-08-26 13:12:49,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173852831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:12:49,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439184584] [2023-08-26 13:12:49,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:12:49,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:12:49,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:12:49,434 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) [2023-08-26 13:12:49,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-26 13:12:49,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:12:49,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:12:49,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:12:49,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:12:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:50,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:12:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:12:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439184584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:12:55,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:12:55,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-26 13:12:55,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958489331] [2023-08-26 13:12:55,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:12:55,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:12:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:12:55,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:12:55,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=328, Unknown=1, NotChecked=0, Total=420 [2023-08-26 13:12:55,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:12:55,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 369 transitions, 4424 flow. Second operand has 21 states, 21 states have (on average 60.76190476190476) internal successors, (1276), 21 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:12:55,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:12:55,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:12:55,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:12:58,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:13:04,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:13:06,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:13:12,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:13:15,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:13:17,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:13:18,838 INFO L124 PetriNetUnfolderBase]: 905/1750 cut-off events. [2023-08-26 13:13:18,838 INFO L125 PetriNetUnfolderBase]: For 45130/45130 co-relation queries the response was YES. [2023-08-26 13:13:18,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13326 conditions, 1750 events. 905/1750 cut-off events. For 45130/45130 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 11053 event pairs, 53 based on Foata normal form. 2/1724 useless extension candidates. Maximal degree in co-relation 13235. Up to 1197 conditions per place. [2023-08-26 13:13:18,853 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 329 selfloop transitions, 139 changer transitions 11/479 dead transitions. [2023-08-26 13:13:18,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 479 transitions, 6783 flow [2023-08-26 13:13:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 13:13:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 13:13:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2189 transitions. [2023-08-26 13:13:18,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39019607843137255 [2023-08-26 13:13:18,856 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2189 transitions. [2023-08-26 13:13:18,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2189 transitions. [2023-08-26 13:13:18,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:13:18,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2189 transitions. [2023-08-26 13:13:18,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.38235294117646) internal successors, (2189), 34 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:18,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 165.0) internal successors, (5775), 35 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:18,863 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 165.0) internal successors, (5775), 35 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:18,863 INFO L175 Difference]: Start difference. First operand has 309 places, 369 transitions, 4424 flow. Second operand 34 states and 2189 transitions. [2023-08-26 13:13:18,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 479 transitions, 6783 flow [2023-08-26 13:13:19,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 479 transitions, 6593 flow, removed 39 selfloop flow, removed 17 redundant places. [2023-08-26 13:13:19,076 INFO L231 Difference]: Finished difference. Result has 331 places, 390 transitions, 5251 flow [2023-08-26 13:13:19,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5251, PETRI_PLACES=331, PETRI_TRANSITIONS=390} [2023-08-26 13:13:19,077 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 303 predicate places. [2023-08-26 13:13:19,077 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 390 transitions, 5251 flow [2023-08-26 13:13:19,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.76190476190476) internal successors, (1276), 21 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:13:19,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:13:19,077 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:13:19,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-26 13:13:19,277 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,SelfDestructingSolverStorable35 [2023-08-26 13:13:19,278 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:13:19,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:13:19,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019199, now seen corresponding path program 6 times [2023-08-26 13:13:19,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:13:19,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50997007] [2023-08-26 13:13:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:13:19,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:13:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:13:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:13:19,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:13:19,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50997007] [2023-08-26 13:13:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50997007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:13:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754704199] [2023-08-26 13:13:19,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:13:19,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:13:19,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:13:19,477 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) [2023-08-26 13:13:19,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-26 13:13:19,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:13:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:13:19,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 13:13:19,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:13:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:13:19,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:13:56,011 WARN L234 SmtUtils]: Spent 9.81s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:14:05,133 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323)))) is different from false [2023-08-26 13:14:07,182 WARN L861 $PredicateComparison]: unable to prove that (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323)))) is different from true [2023-08-26 13:14:13,664 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (< v_z_323 0) (= (mod c_~x_2~0 4294967296) (+ (mod c_~x_1~0 4294967296) v_z_323)) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_323)))) is different from false [2023-08-26 13:14:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:14:19,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754704199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:14:19,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:14:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2023-08-26 13:14:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326565608] [2023-08-26 13:14:19,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:14:19,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 13:14:19,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:14:19,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 13:14:19,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=199, Unknown=9, NotChecked=62, Total=342 [2023-08-26 13:14:19,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:14:19,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 390 transitions, 5251 flow. Second operand has 19 states, 19 states have (on average 63.1578947368421) internal successors, (1200), 19 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:14:19,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:14:19,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:14:19,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:14:21,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:23,813 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (< v_z_323 0) (= (mod c_~x_2~0 4294967296) (+ (mod c_~x_1~0 4294967296) v_z_323)) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_323)))) (= c_~x_1~0 0)) is different from false [2023-08-26 13:14:25,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:27,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:29,931 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323)))) (= c_~x_1~0 0)) is different from false [2023-08-26 13:14:31,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:36,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:37,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:39,667 WARN L839 $PredicateComparison]: unable to prove that (and (or (< 4294967294 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:14:41,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:44,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:49,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:51,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:14:56,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:00,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:02,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:04,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:06,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:08,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:12,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:14,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:16,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:18,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:20,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:23,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:25,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:27,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:29,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:31,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:33,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:35,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:37,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:39,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:41,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:43,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:15:43,760 INFO L124 PetriNetUnfolderBase]: 996/1961 cut-off events. [2023-08-26 13:15:43,760 INFO L125 PetriNetUnfolderBase]: For 66161/66161 co-relation queries the response was YES. [2023-08-26 13:15:43,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16797 conditions, 1961 events. 996/1961 cut-off events. For 66161/66161 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12868 event pairs, 81 based on Foata normal form. 7/1944 useless extension candidates. Maximal degree in co-relation 16703. Up to 1523 conditions per place. [2023-08-26 13:15:43,778 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 388 selfloop transitions, 69 changer transitions 50/507 dead transitions. [2023-08-26 13:15:43,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 507 transitions, 8483 flow [2023-08-26 13:15:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 13:15:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 13:15:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1331 transitions. [2023-08-26 13:15:43,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2023-08-26 13:15:43,780 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1331 transitions. [2023-08-26 13:15:43,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1331 transitions. [2023-08-26 13:15:43,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:15:43,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1331 transitions. [2023-08-26 13:15:43,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.55) internal successors, (1331), 20 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:43,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:43,783 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:43,784 INFO L175 Difference]: Start difference. First operand has 331 places, 390 transitions, 5251 flow. Second operand 20 states and 1331 transitions. [2023-08-26 13:15:43,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 507 transitions, 8483 flow [2023-08-26 13:15:44,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 507 transitions, 7816 flow, removed 271 selfloop flow, removed 21 redundant places. [2023-08-26 13:15:44,116 INFO L231 Difference]: Finished difference. Result has 337 places, 401 transitions, 5400 flow [2023-08-26 13:15:44,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5400, PETRI_PLACES=337, PETRI_TRANSITIONS=401} [2023-08-26 13:15:44,117 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 309 predicate places. [2023-08-26 13:15:44,117 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 401 transitions, 5400 flow [2023-08-26 13:15:44,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.1578947368421) internal successors, (1200), 19 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:44,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:15:44,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:15:44,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-26 13:15:44,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-26 13:15:44,321 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:15:44,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:15:44,321 INFO L85 PathProgramCache]: Analyzing trace with hash -731168397, now seen corresponding path program 22 times [2023-08-26 13:15:44,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:15:44,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625986349] [2023-08-26 13:15:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:15:44,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:15:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:15:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:44,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:15:44,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625986349] [2023-08-26 13:15:44,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625986349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:15:44,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483771381] [2023-08-26 13:15:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:15:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:15:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:15:44,984 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) [2023-08-26 13:15:44,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-26 13:15:45,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:15:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:15:45,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:15:45,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:15:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:46,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:15:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:15:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483771381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:15:49,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:15:49,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:15:49,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363851500] [2023-08-26 13:15:49,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:15:49,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:15:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:15:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:15:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:15:49,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:15:49,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 401 transitions, 5400 flow. Second operand has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:15:49,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:15:49,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:15:49,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:15:52,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:15:55,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:15:57,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:00,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:03,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:05,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:07,958 INFO L124 PetriNetUnfolderBase]: 931/1809 cut-off events. [2023-08-26 13:16:07,958 INFO L125 PetriNetUnfolderBase]: For 57070/57070 co-relation queries the response was YES. [2023-08-26 13:16:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15250 conditions, 1809 events. 931/1809 cut-off events. For 57070/57070 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 11431 event pairs, 113 based on Foata normal form. 2/1787 useless extension candidates. Maximal degree in co-relation 15150. Up to 1650 conditions per place. [2023-08-26 13:16:07,982 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 341 selfloop transitions, 98 changer transitions 10/449 dead transitions. [2023-08-26 13:16:07,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 449 transitions, 6689 flow [2023-08-26 13:16:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 13:16:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 13:16:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1587 transitions. [2023-08-26 13:16:07,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38472727272727275 [2023-08-26 13:16:07,984 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1587 transitions. [2023-08-26 13:16:07,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1587 transitions. [2023-08-26 13:16:07,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:07,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1587 transitions. [2023-08-26 13:16:07,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 63.48) internal successors, (1587), 25 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:07,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:07,989 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:07,989 INFO L175 Difference]: Start difference. First operand has 337 places, 401 transitions, 5400 flow. Second operand 25 states and 1587 transitions. [2023-08-26 13:16:07,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 449 transitions, 6689 flow [2023-08-26 13:16:08,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 449 transitions, 6526 flow, removed 65 selfloop flow, removed 12 redundant places. [2023-08-26 13:16:08,270 INFO L231 Difference]: Finished difference. Result has 342 places, 410 transitions, 5650 flow [2023-08-26 13:16:08,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5245, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5650, PETRI_PLACES=342, PETRI_TRANSITIONS=410} [2023-08-26 13:16:08,271 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 314 predicate places. [2023-08-26 13:16:08,271 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 410 transitions, 5650 flow [2023-08-26 13:16:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:08,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:08,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:08,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-26 13:16:08,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 13:16:08,472 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:16:08,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1750647411, now seen corresponding path program 23 times [2023-08-26 13:16:08,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:08,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890290960] [2023-08-26 13:16:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:09,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:09,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890290960] [2023-08-26 13:16:09,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890290960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:09,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699593332] [2023-08-26 13:16:09,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:16:09,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:09,032 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) [2023-08-26 13:16:09,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-26 13:16:09,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:16:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:16:09,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:16:09,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:09,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:16:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:14,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699593332] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:16:14,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:16:14,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:16:14,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590668485] [2023-08-26 13:16:14,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:16:14,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:16:14,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:16:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:16:14,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:16:14,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 410 transitions, 5650 flow. Second operand has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:14,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:14,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:16:14,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:16,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:20,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:22,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:24,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:26,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:29,326 INFO L124 PetriNetUnfolderBase]: 973/1899 cut-off events. [2023-08-26 13:16:29,326 INFO L125 PetriNetUnfolderBase]: For 55966/55966 co-relation queries the response was YES. [2023-08-26 13:16:29,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15993 conditions, 1899 events. 973/1899 cut-off events. For 55966/55966 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 12302 event pairs, 98 based on Foata normal form. 4/1881 useless extension candidates. Maximal degree in co-relation 15893. Up to 1670 conditions per place. [2023-08-26 13:16:29,344 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 372 selfloop transitions, 92 changer transitions 15/479 dead transitions. [2023-08-26 13:16:29,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 479 transitions, 7212 flow [2023-08-26 13:16:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 13:16:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 13:16:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1537 transitions. [2023-08-26 13:16:29,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881313131313131 [2023-08-26 13:16:29,350 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1537 transitions. [2023-08-26 13:16:29,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1537 transitions. [2023-08-26 13:16:29,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:29,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1537 transitions. [2023-08-26 13:16:29,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.04166666666667) internal successors, (1537), 24 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:29,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:29,355 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:29,355 INFO L175 Difference]: Start difference. First operand has 342 places, 410 transitions, 5650 flow. Second operand 24 states and 1537 transitions. [2023-08-26 13:16:29,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 479 transitions, 7212 flow [2023-08-26 13:16:29,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 479 transitions, 6982 flow, removed 53 selfloop flow, removed 20 redundant places. [2023-08-26 13:16:29,617 INFO L231 Difference]: Finished difference. Result has 352 places, 424 transitions, 5996 flow [2023-08-26 13:16:29,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5996, PETRI_PLACES=352, PETRI_TRANSITIONS=424} [2023-08-26 13:16:29,617 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 324 predicate places. [2023-08-26 13:16:29,617 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 424 transitions, 5996 flow [2023-08-26 13:16:29,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:29,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:29,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:29,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-26 13:16:29,818 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,SelfDestructingSolverStorable38 [2023-08-26 13:16:29,819 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:16:29,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1734973259, now seen corresponding path program 24 times [2023-08-26 13:16:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:29,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145894801] [2023-08-26 13:16:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:29,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:30,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:30,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145894801] [2023-08-26 13:16:30,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145894801] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:30,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041932601] [2023-08-26 13:16:30,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:16:30,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:30,580 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) [2023-08-26 13:16:30,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-26 13:16:30,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:16:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:16:30,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:16:30,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:31,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:16:34,872 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (div (+ (mod c_~x_1~0 4294967296) (- 4294967294)) 4294967296)) (.cse2 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse0 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (forall ((v_z_371 Int)) (or (< .cse0 v_z_371) (let ((.cse1 (* 2 v_z_371))) (< (+ c_~x_2~0 .cse1 .cse2) (+ c_~x_1~0 3 (* (div (+ c_~x_2~0 .cse1) 4294967296) 4294967296)))) (<= v_z_371 .cse3))) (or (forall ((v_z_373 Int)) (or (<= v_z_373 .cse3) (< .cse0 v_z_373) (let ((.cse4 (* 2 v_z_373))) (< (+ (* 4294967296 (div (+ c_~x_2~0 .cse4) 4294967296)) c_~x_1~0) (+ (* .cse5 4294967296) c_~x_2~0 4294967295 .cse2 .cse4))))) (< 0 (+ .cse5 1))) (or (forall ((v_z_371 Int)) (or (let ((.cse6 (* 2 v_z_371))) (< (+ c_~x_2~0 .cse6 .cse2 4294967293) (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296)))) (< .cse0 v_z_371) (<= v_z_371 .cse3))) (< .cse5 0)) (forall ((v_z_373 Int)) (or (let ((.cse7 (* 2 v_z_373))) (< (+ (* 4294967296 (div (+ c_~x_2~0 .cse7) 4294967296)) c_~x_1~0) (+ c_~x_2~0 4294967295 .cse2 .cse7))) (<= v_z_373 .cse3) (< .cse0 v_z_373))))) is different from false [2023-08-26 13:16:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 13:16:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041932601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:16:35,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:16:35,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-26 13:16:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430817261] [2023-08-26 13:16:35,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:16:35,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:16:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:16:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=340, Unknown=1, NotChecked=38, Total=462 [2023-08-26 13:16:35,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:16:35,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 424 transitions, 5996 flow. Second operand has 22 states, 22 states have (on average 60.81818181818182) internal successors, (1338), 22 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:35,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:35,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:16:35,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:40,178 INFO L124 PetriNetUnfolderBase]: 986/1920 cut-off events. [2023-08-26 13:16:40,178 INFO L125 PetriNetUnfolderBase]: For 59137/59137 co-relation queries the response was YES. [2023-08-26 13:16:40,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16381 conditions, 1920 events. 986/1920 cut-off events. For 59137/59137 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12443 event pairs, 67 based on Foata normal form. 6/1904 useless extension candidates. Maximal degree in co-relation 16274. Up to 1518 conditions per place. [2023-08-26 13:16:40,198 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 344 selfloop transitions, 137 changer transitions 18/499 dead transitions. [2023-08-26 13:16:40,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 499 transitions, 7441 flow [2023-08-26 13:16:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 13:16:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 13:16:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1732 transitions. [2023-08-26 13:16:40,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38877665544332213 [2023-08-26 13:16:40,201 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1732 transitions. [2023-08-26 13:16:40,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1732 transitions. [2023-08-26 13:16:40,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:16:40,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1732 transitions. [2023-08-26 13:16:40,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 64.14814814814815) internal successors, (1732), 27 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:40,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 165.0) internal successors, (4620), 28 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:40,204 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 165.0) internal successors, (4620), 28 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:40,205 INFO L175 Difference]: Start difference. First operand has 352 places, 424 transitions, 5996 flow. Second operand 27 states and 1732 transitions. [2023-08-26 13:16:40,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 499 transitions, 7441 flow [2023-08-26 13:16:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 499 transitions, 7187 flow, removed 80 selfloop flow, removed 16 redundant places. [2023-08-26 13:16:40,534 INFO L231 Difference]: Finished difference. Result has 365 places, 429 transitions, 6159 flow [2023-08-26 13:16:40,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6159, PETRI_PLACES=365, PETRI_TRANSITIONS=429} [2023-08-26 13:16:40,535 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 337 predicate places. [2023-08-26 13:16:40,536 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 429 transitions, 6159 flow [2023-08-26 13:16:40,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.81818181818182) internal successors, (1338), 22 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:40,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:16:40,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:16:40,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-26 13:16:40,741 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,SelfDestructingSolverStorable39 [2023-08-26 13:16:40,741 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:16:40,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:16:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1013097001, now seen corresponding path program 25 times [2023-08-26 13:16:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:16:40,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053279848] [2023-08-26 13:16:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:16:40,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:16:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:16:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053279848] [2023-08-26 13:16:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053279848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:16:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40679508] [2023-08-26 13:16:41,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:16:41,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:16:41,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:16:41,583 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) [2023-08-26 13:16:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-26 13:16:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:16:41,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:16:41,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:16:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:42,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:16:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:16:44,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40679508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:16:44,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:16:44,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:16:44,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403119188] [2023-08-26 13:16:44,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:16:44,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:16:44,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:16:44,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:16:44,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:16:44,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:16:44,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 429 transitions, 6159 flow. Second operand has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:16:44,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:16:44,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:16:44,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:16:47,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:52,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:54,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:16:58,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:17:01,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:17:02,809 INFO L124 PetriNetUnfolderBase]: 1002/1949 cut-off events. [2023-08-26 13:17:02,809 INFO L125 PetriNetUnfolderBase]: For 65063/65063 co-relation queries the response was YES. [2023-08-26 13:17:02,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17096 conditions, 1949 events. 1002/1949 cut-off events. For 65063/65063 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12672 event pairs, 107 based on Foata normal form. 2/1927 useless extension candidates. Maximal degree in co-relation 16986. Up to 1650 conditions per place. [2023-08-26 13:17:02,826 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 353 selfloop transitions, 139 changer transitions 10/502 dead transitions. [2023-08-26 13:17:02,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 502 transitions, 8023 flow [2023-08-26 13:17:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 13:17:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 13:17:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1855 transitions. [2023-08-26 13:17:02,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876698014629049 [2023-08-26 13:17:02,829 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1855 transitions. [2023-08-26 13:17:02,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1855 transitions. [2023-08-26 13:17:02,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:02,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1855 transitions. [2023-08-26 13:17:02,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 63.96551724137931) internal successors, (1855), 29 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:02,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 165.0) internal successors, (4950), 30 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:02,834 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 165.0) internal successors, (4950), 30 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:02,834 INFO L175 Difference]: Start difference. First operand has 365 places, 429 transitions, 6159 flow. Second operand 29 states and 1855 transitions. [2023-08-26 13:17:02,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 502 transitions, 8023 flow [2023-08-26 13:17:03,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 502 transitions, 7814 flow, removed 43 selfloop flow, removed 17 redundant places. [2023-08-26 13:17:03,123 INFO L231 Difference]: Finished difference. Result has 375 places, 445 transitions, 6789 flow [2023-08-26 13:17:03,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6789, PETRI_PLACES=375, PETRI_TRANSITIONS=445} [2023-08-26 13:17:03,124 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 347 predicate places. [2023-08-26 13:17:03,124 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 445 transitions, 6789 flow [2023-08-26 13:17:03,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:03,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:17:03,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:17:03,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-26 13:17:03,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:17:03,330 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:17:03,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:17:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1495932121, now seen corresponding path program 5 times [2023-08-26 13:17:03,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:17:03,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787719689] [2023-08-26 13:17:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:17:03,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:17:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:17:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:03,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:17:03,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787719689] [2023-08-26 13:17:03,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787719689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:17:03,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630141668] [2023-08-26 13:17:03,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:17:03,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:17:03,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:17:03,557 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) [2023-08-26 13:17:03,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-26 13:17:03,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:17:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:17:03,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 13:17:03,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:17:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:03,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:17:14,314 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 36 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:17:16,349 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_397 Int) (v_y_397 Int)) (let ((.cse2 (+ (* 2863311531 v_z_397) (* v_y_397 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_397))) (or (= .cse0 .cse1) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (< .cse2 0) (= (+ .cse0 4294967296) .cse1) (< v_z_397 0) (<= 4294967296 v_z_397)))) is different from false [2023-08-26 13:17:20,452 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_397 Int) (v_y_397 Int)) (let ((.cse0 (+ (* 2863311531 v_z_397) (* v_y_397 4294967296))) (.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (+ (mod c_~x_2~0 4294967296) v_z_397))) (or (< 0 .cse0) (= .cse1 .cse2) (< .cse0 0) (= (+ .cse1 4294967296) .cse2) (< v_z_397 0) (<= 4294967296 v_z_397)))) is different from false [2023-08-26 13:17:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:26,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630141668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:17:26,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:17:26,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-26 13:17:26,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724975584] [2023-08-26 13:17:26,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:17:26,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:17:26,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:17:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:17:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=173, Unknown=4, NotChecked=58, Total=306 [2023-08-26 13:17:26,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:17:26,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 445 transitions, 6789 flow. Second operand has 18 states, 18 states have (on average 63.27777777777778) internal successors, (1139), 18 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:26,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:17:26,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:17:26,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:17:28,718 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_z_397 Int) (v_y_397 Int)) (let ((.cse0 (+ (* 2863311531 v_z_397) (* v_y_397 4294967296))) (.cse1 (mod c_~x_1~0 4294967296)) (.cse2 (+ (mod c_~x_2~0 4294967296) v_z_397))) (or (< 0 .cse0) (= .cse1 .cse2) (< .cse0 0) (= (+ .cse1 4294967296) .cse2) (< v_z_397 0) (<= 4294967296 v_z_397)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:17:30,737 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_z_397 Int) (v_y_397 Int)) (let ((.cse2 (+ (* 2863311531 v_z_397) (* v_y_397 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_397))) (or (= .cse0 .cse1) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (< .cse2 0) (= (+ .cse0 4294967296) .cse1) (< v_z_397 0) (<= 4294967296 v_z_397)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:17:32,818 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_z_397 Int) (v_y_397 Int)) (let ((.cse2 (+ (* 2863311531 v_z_397) (* v_y_397 4294967296))) (.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_397))) (or (= .cse0 .cse1) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse2) (< .cse2 0) (= (+ .cse0 4294967296) .cse1) (< v_z_397 0) (<= 4294967296 v_z_397)))) (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:17:34,621 INFO L124 PetriNetUnfolderBase]: 1055/2048 cut-off events. [2023-08-26 13:17:34,622 INFO L125 PetriNetUnfolderBase]: For 75796/75796 co-relation queries the response was YES. [2023-08-26 13:17:34,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18828 conditions, 2048 events. 1055/2048 cut-off events. For 75796/75796 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 13400 event pairs, 152 based on Foata normal form. 2/2030 useless extension candidates. Maximal degree in co-relation 18717. Up to 1945 conditions per place. [2023-08-26 13:17:34,644 INFO L140 encePairwiseOnDemand]: 155/165 looper letters, 466 selfloop transitions, 28 changer transitions 3/497 dead transitions. [2023-08-26 13:17:34,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 497 transitions, 8711 flow [2023-08-26 13:17:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:17:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:17:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 863 transitions. [2023-08-26 13:17:34,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40233100233100233 [2023-08-26 13:17:34,646 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 863 transitions. [2023-08-26 13:17:34,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 863 transitions. [2023-08-26 13:17:34,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:34,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 863 transitions. [2023-08-26 13:17:34,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.38461538461539) internal successors, (863), 13 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:34,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:34,648 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:34,648 INFO L175 Difference]: Start difference. First operand has 375 places, 445 transitions, 6789 flow. Second operand 13 states and 863 transitions. [2023-08-26 13:17:34,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 497 transitions, 8711 flow [2023-08-26 13:17:35,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 497 transitions, 8315 flow, removed 123 selfloop flow, removed 27 redundant places. [2023-08-26 13:17:35,038 INFO L231 Difference]: Finished difference. Result has 367 places, 468 transitions, 7089 flow [2023-08-26 13:17:35,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7089, PETRI_PLACES=367, PETRI_TRANSITIONS=468} [2023-08-26 13:17:35,039 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 339 predicate places. [2023-08-26 13:17:35,039 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 468 transitions, 7089 flow [2023-08-26 13:17:35,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.27777777777778) internal successors, (1139), 18 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:35,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:17:35,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:17:35,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-26 13:17:35,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:17:35,244 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:17:35,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:17:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1044331281, now seen corresponding path program 26 times [2023-08-26 13:17:35,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:17:35,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580852981] [2023-08-26 13:17:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:17:35,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:17:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:17:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:17:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580852981] [2023-08-26 13:17:35,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580852981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:17:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531535131] [2023-08-26 13:17:35,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:17:35,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:17:35,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:17:35,872 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) [2023-08-26 13:17:35,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-26 13:17:36,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:17:36,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:17:36,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:17:36,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:17:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:36,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:17:39,835 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse6 (mod (+ 2 c_thread2Thread1of1ForFork1_~i~1) 4294967296)) (.cse2 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse1 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse4 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (forall ((v_z_409 Int)) (or (let ((.cse0 (* 2 v_z_409))) (< (+ c_~x_2~0 .cse0 .cse1) (+ .cse2 c_~x_1~0 2 (* (div (+ c_~x_2~0 .cse0) 4294967296) 4294967296)))) (<= v_z_409 .cse3) (< .cse4 v_z_409))) (forall ((v_z_409 Int)) (let ((.cse7 (* 2 v_z_409))) (let ((.cse5 (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296))) (or (< (+ 4294967294 .cse5 (* (div (+ (- 1) (* (- 1) c_~x_2~0) (* (- 2) v_z_409) c_~x_1~0 .cse6) 4294967296) 4294967296)) (+ .cse2 .cse1)) (<= v_z_409 .cse3) (< (+ c_~x_2~0 (* (div .cse6 4294967296) 4294967296) .cse7 4294967294 .cse1) (+ .cse2 c_~x_1~0 .cse5)) (< .cse4 v_z_409))))) (forall ((v_z_409 Int)) (or (<= v_z_409 .cse3) (let ((.cse8 (* 2 v_z_409))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse8) 4294967296) 4294967296) .cse6) (+ (* (div (+ .cse2 (- 4294967295)) 4294967296) 4294967296) c_~x_2~0 8589934593 .cse8 .cse1))) (< .cse4 v_z_409))))) is different from false [2023-08-26 13:17:41,900 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (div c_~x_1~0 4294967296))) (let ((.cse2 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse3 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse1 (* 4294967296 .cse5))) (and (forall ((v_z_409 Int)) (or (let ((.cse0 (* 2 v_z_409))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse0) 4294967296) 4294967296)) (+ c_~x_2~0 .cse0 4294967295 .cse1))) (<= v_z_409 .cse2) (< .cse3 v_z_409))) (forall ((v_z_409 Int)) (let ((.cse6 (* 2 v_z_409))) (let ((.cse4 (div (+ c_~x_2~0 .cse6) 4294967296))) (or (< (+ (div (+ (* (- 1) c_~x_2~0) (* (- 2) v_z_409) c_~x_1~0 1) 4294967296) .cse4) .cse5) (<= v_z_409 .cse2) (< (+ c_~x_2~0 .cse6 .cse1 4294967293) (+ c_~x_1~0 (* .cse4 4294967296))) (< .cse3 v_z_409))))) (forall ((v_z_409 Int)) (or (<= v_z_409 .cse2) (< .cse3 v_z_409) (let ((.cse7 (* 2 v_z_409))) (< (+ c_~x_2~0 .cse7 .cse1) (+ c_~x_1~0 3 (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296))))))))) is different from false [2023-08-26 13:17:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-26 13:17:42,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531535131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:17:42,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:17:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:17:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084087438] [2023-08-26 13:17:42,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:17:42,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:17:42,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:17:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:17:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=241, Unknown=2, NotChecked=66, Total=380 [2023-08-26 13:17:42,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:17:42,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 468 transitions, 7089 flow. Second operand has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:42,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:17:42,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:17:42,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:17:44,366 INFO L124 PetriNetUnfolderBase]: 1080/2101 cut-off events. [2023-08-26 13:17:44,366 INFO L125 PetriNetUnfolderBase]: For 72586/72586 co-relation queries the response was YES. [2023-08-26 13:17:44,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19340 conditions, 2101 events. 1080/2101 cut-off events. For 72586/72586 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 13864 event pairs, 125 based on Foata normal form. 2/2085 useless extension candidates. Maximal degree in co-relation 19226. Up to 1940 conditions per place. [2023-08-26 13:17:44,389 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 432 selfloop transitions, 69 changer transitions 10/511 dead transitions. [2023-08-26 13:17:44,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 511 transitions, 8569 flow [2023-08-26 13:17:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:17:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:17:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1088 transitions. [2023-08-26 13:17:44,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-08-26 13:17:44,391 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1088 transitions. [2023-08-26 13:17:44,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1088 transitions. [2023-08-26 13:17:44,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:17:44,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1088 transitions. [2023-08-26 13:17:44,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.0) internal successors, (1088), 17 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:44,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:44,394 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:44,394 INFO L175 Difference]: Start difference. First operand has 367 places, 468 transitions, 7089 flow. Second operand 17 states and 1088 transitions. [2023-08-26 13:17:44,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 511 transitions, 8569 flow [2023-08-26 13:17:44,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 511 transitions, 8451 flow, removed 57 selfloop flow, removed 1 redundant places. [2023-08-26 13:17:44,748 INFO L231 Difference]: Finished difference. Result has 388 places, 476 transitions, 7355 flow [2023-08-26 13:17:44,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6975, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7355, PETRI_PLACES=388, PETRI_TRANSITIONS=476} [2023-08-26 13:17:44,749 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 360 predicate places. [2023-08-26 13:17:44,749 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 476 transitions, 7355 flow [2023-08-26 13:17:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:17:44,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:17:44,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:17:44,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-26 13:17:44,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:17:44,954 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:17:44,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:17:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash 476276437, now seen corresponding path program 6 times [2023-08-26 13:17:44,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:17:44,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003508478] [2023-08-26 13:17:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:17:44,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:17:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:17:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:17:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003508478] [2023-08-26 13:17:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003508478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:17:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060391245] [2023-08-26 13:17:45,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:17:45,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:17:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:17:45,193 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) [2023-08-26 13:17:45,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-26 13:17:45,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 13:17:45,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:17:45,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:17:45,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:17:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:17:45,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:17:47,812 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_~x_1~0 4294967296))) (let ((.cse2 (+ .cse5 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse0 (+ .cse4 v_z_413)) (.cse1 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (<= 4294967296 v_z_413) (< .cse0 4294967296) (< .cse1 0) (= .cse2 .cse0) (< .cse3 .cse1)))) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse6 (+ .cse4 v_z_413)) (.cse7 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (= .cse5 .cse6) (< .cse7 0) (<= 4294967296 .cse6) (< v_z_413 0) (< .cse3 .cse7)))) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse8 (+ .cse4 v_z_413)) (.cse9 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (<= 4294967296 v_z_413) (= .cse5 .cse8) (< .cse9 0) (= .cse2 .cse8) (< v_z_413 0) (< .cse3 .cse9))))))) is different from false [2023-08-26 13:18:04,065 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse0 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (< 0 .cse0) (<= 4294967296 v_z_413) (< (+ .cse1 v_z_413) 4294967296) (< .cse0 0)))) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse2 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (< 0 .cse2) (<= 4294967296 v_z_413) (= .cse3 (+ .cse1 v_z_413)) (< .cse2 0) (< v_z_413 0)))) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse4 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413))) (.cse5 (+ .cse1 v_z_413))) (or (< 0 .cse4) (= .cse3 .cse5) (< .cse4 0) (<= 4294967296 .cse5) (< v_z_413 0)))))) is different from false [2023-08-26 13:18:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-26 13:18:24,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060391245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:18:24,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:18:24,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-26 13:18:24,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931232382] [2023-08-26 13:18:24,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:18:24,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:18:24,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:18:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:18:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=129, Unknown=2, NotChecked=50, Total=240 [2023-08-26 13:18:24,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:18:24,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 476 transitions, 7355 flow. Second operand has 16 states, 16 states have (on average 69.3125) internal successors, (1109), 16 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:24,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:18:24,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:18:24,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:18:26,463 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (= c_~x_2~0 0) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse0 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (< 0 .cse0) (<= 4294967296 v_z_413) (< (+ .cse1 v_z_413) 4294967296) (< .cse0 0)))) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse2 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (< 0 .cse2) (<= 4294967296 v_z_413) (= .cse3 (+ .cse1 v_z_413)) (< .cse2 0) (< v_z_413 0)))) (= c_~x_1~0 0) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse4 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413))) (.cse5 (+ .cse1 v_z_413))) (or (< 0 .cse4) (= .cse3 .cse5) (< .cse4 0) (<= 4294967296 .cse5) (< v_z_413 0)))))) is different from false [2023-08-26 13:18:28,491 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (mod c_~x_1~0 4294967296))) (let ((.cse2 (+ .cse5 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse4 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse0 (+ .cse4 v_z_413)) (.cse1 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (<= 4294967296 v_z_413) (< .cse0 4294967296) (< .cse1 0) (= .cse2 .cse0) (< .cse3 .cse1)))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse6 (+ .cse4 v_z_413)) (.cse7 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (= .cse5 .cse6) (< .cse7 0) (<= 4294967296 .cse6) (< v_z_413 0) (< .cse3 .cse7)))) (forall ((v_z_413 Int) (v_y_413 Int)) (let ((.cse8 (+ .cse4 v_z_413)) (.cse9 (+ (* v_y_413 4294967296) (* 2863311531 v_z_413)))) (or (<= 4294967296 v_z_413) (= .cse5 .cse8) (< .cse9 0) (= .cse2 .cse8) (< v_z_413 0) (< .cse3 .cse9))))))) is different from false [2023-08-26 13:18:29,559 INFO L124 PetriNetUnfolderBase]: 1115/2169 cut-off events. [2023-08-26 13:18:29,559 INFO L125 PetriNetUnfolderBase]: For 83098/83108 co-relation queries the response was YES. [2023-08-26 13:18:29,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20810 conditions, 2169 events. 1115/2169 cut-off events. For 83098/83108 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 14413 event pairs, 380 based on Foata normal form. 9/2151 useless extension candidates. Maximal degree in co-relation 20689. Up to 2049 conditions per place. [2023-08-26 13:18:29,585 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 487 selfloop transitions, 23 changer transitions 3/525 dead transitions. [2023-08-26 13:18:29,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 525 transitions, 9381 flow [2023-08-26 13:18:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 13:18:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 13:18:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 799 transitions. [2023-08-26 13:18:29,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4402203856749311 [2023-08-26 13:18:29,587 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 799 transitions. [2023-08-26 13:18:29,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 799 transitions. [2023-08-26 13:18:29,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:18:29,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 799 transitions. [2023-08-26 13:18:29,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 72.63636363636364) internal successors, (799), 11 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:29,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 165.0) internal successors, (1980), 12 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:29,588 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 165.0) internal successors, (1980), 12 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:29,589 INFO L175 Difference]: Start difference. First operand has 388 places, 476 transitions, 7355 flow. Second operand 11 states and 799 transitions. [2023-08-26 13:18:29,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 525 transitions, 9381 flow [2023-08-26 13:18:29,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 525 transitions, 9185 flow, removed 55 selfloop flow, removed 11 redundant places. [2023-08-26 13:18:29,959 INFO L231 Difference]: Finished difference. Result has 394 places, 497 transitions, 7879 flow [2023-08-26 13:18:29,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7879, PETRI_PLACES=394, PETRI_TRANSITIONS=497} [2023-08-26 13:18:29,960 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 366 predicate places. [2023-08-26 13:18:29,960 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 497 transitions, 7879 flow [2023-08-26 13:18:29,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 69.3125) internal successors, (1109), 16 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:29,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:18:29,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:18:29,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-26 13:18:30,165 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,SelfDestructingSolverStorable43 [2023-08-26 13:18:30,165 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:18:30,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:18:30,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1284496423, now seen corresponding path program 7 times [2023-08-26 13:18:30,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:18:30,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346412237] [2023-08-26 13:18:30,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:18:30,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:18:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:30,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:18:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346412237] [2023-08-26 13:18:30,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346412237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:18:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977477548] [2023-08-26 13:18:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:18:30,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:18:30,372 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) [2023-08-26 13:18:30,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-26 13:18:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:30,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 13:18:30,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:18:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:30,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:18:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977477548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:18:30,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:18:30,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-08-26 13:18:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257942795] [2023-08-26 13:18:30,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:18:30,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:18:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:18:30,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:18:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:18:30,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:18:30,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 497 transitions, 7879 flow. Second operand has 16 states, 16 states have (on average 63.625) internal successors, (1018), 16 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:30,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:18:30,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:18:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:18:32,932 INFO L124 PetriNetUnfolderBase]: 1184/2300 cut-off events. [2023-08-26 13:18:32,932 INFO L125 PetriNetUnfolderBase]: For 101701/101701 co-relation queries the response was YES. [2023-08-26 13:18:32,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22714 conditions, 2300 events. 1184/2300 cut-off events. For 101701/101701 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 15432 event pairs, 235 based on Foata normal form. 3/2287 useless extension candidates. Maximal degree in co-relation 22585. Up to 1806 conditions per place. [2023-08-26 13:18:32,956 INFO L140 encePairwiseOnDemand]: 158/165 looper letters, 424 selfloop transitions, 114 changer transitions 6/544 dead transitions. [2023-08-26 13:18:32,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 544 transitions, 9911 flow [2023-08-26 13:18:32,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 13:18:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 13:18:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1190 transitions. [2023-08-26 13:18:32,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006734006734007 [2023-08-26 13:18:32,959 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1190 transitions. [2023-08-26 13:18:32,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1190 transitions. [2023-08-26 13:18:32,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:18:32,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1190 transitions. [2023-08-26 13:18:32,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.11111111111111) internal successors, (1190), 18 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:32,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:32,962 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:32,962 INFO L175 Difference]: Start difference. First operand has 394 places, 497 transitions, 7879 flow. Second operand 18 states and 1190 transitions. [2023-08-26 13:18:32,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 544 transitions, 9911 flow [2023-08-26 13:18:33,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 544 transitions, 9767 flow, removed 66 selfloop flow, removed 1 redundant places. [2023-08-26 13:18:33,451 INFO L231 Difference]: Finished difference. Result has 413 places, 508 transitions, 8497 flow [2023-08-26 13:18:33,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8497, PETRI_PLACES=413, PETRI_TRANSITIONS=508} [2023-08-26 13:18:33,452 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 385 predicate places. [2023-08-26 13:18:33,452 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 508 transitions, 8497 flow [2023-08-26 13:18:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.625) internal successors, (1018), 16 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:18:33,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:18:33,452 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:18:33,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-26 13:18:33,652 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,SelfDestructingSolverStorable44 [2023-08-26 13:18:33,653 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:18:33,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:18:33,653 INFO L85 PathProgramCache]: Analyzing trace with hash -584264127, now seen corresponding path program 7 times [2023-08-26 13:18:33,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:18:33,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133215831] [2023-08-26 13:18:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:18:33,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:18:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:33,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:18:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133215831] [2023-08-26 13:18:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133215831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:18:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343048797] [2023-08-26 13:18:33,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:18:33,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:18:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:18:33,889 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) [2023-08-26 13:18:33,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-26 13:18:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:18:33,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 13:18:33,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:18:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:18:34,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:18:50,989 WARN L234 SmtUtils]: Spent 12.34s on a formula simplification. DAG size of input: 36 DAG size of output: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:18:53,046 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (.cse3 (mod c_~x_2~0 4294967296)) (.cse4 (mod c_~x_1~0 4294967296))) (and (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse0 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse2 (+ .cse4 v_z_421))) (or (< .cse0 0) (< v_z_421 0) (< .cse1 .cse0) (= .cse2 .cse3) (<= 4294967296 .cse2)))) (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse5 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse6 (+ .cse4 v_z_421))) (or (< .cse5 0) (< .cse1 .cse5) (<= 4294967296 v_z_421) (= .cse6 (+ .cse3 4294967296)) (< .cse6 4294967296)))))) is different from false [2023-08-26 13:18:57,406 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse0 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_421))) (or (< .cse0 0) (< v_z_421 0) (= .cse1 (mod c_~x_2~0 4294967296)) (< 0 .cse0) (<= 4294967296 .cse1)))) is different from false [2023-08-26 13:19:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:19:07,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343048797] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:19:07,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:19:07,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-26 13:19:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535967704] [2023-08-26 13:19:07,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:19:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 13:19:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:19:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 13:19:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=171, Unknown=4, NotChecked=58, Total=306 [2023-08-26 13:19:07,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 13:19:07,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 508 transitions, 8497 flow. Second operand has 18 states, 18 states have (on average 63.27777777777778) internal successors, (1139), 18 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:07,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:19:07,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 13:19:07,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:19:10,004 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse0 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_421))) (or (< .cse0 0) (< v_z_421 0) (= .cse1 (mod c_~x_2~0 4294967296)) (< 0 .cse0) (<= 4294967296 .cse1))))) is different from false [2023-08-26 13:19:12,098 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (.cse3 (mod c_~x_2~0 4294967296)) (.cse4 (mod c_~x_1~0 4294967296))) (and (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse0 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse2 (+ .cse4 v_z_421))) (or (< .cse0 0) (< v_z_421 0) (< .cse1 .cse0) (= .cse2 .cse3) (<= 4294967296 .cse2)))) (= c_~x_2~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse5 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse6 (+ .cse4 v_z_421))) (or (< .cse5 0) (< .cse1 .cse5) (<= 4294967296 v_z_421) (= .cse6 (+ .cse3 4294967296)) (< .cse6 4294967296)))) (= c_~x_1~0 0))) is different from false [2023-08-26 13:19:14,182 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (or (< 4294967294 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (let ((.cse1 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (.cse3 (mod c_~x_2~0 4294967296)) (.cse4 (mod c_~x_1~0 4294967296))) (and (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse0 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse2 (+ .cse4 v_z_421))) (or (< .cse0 0) (< v_z_421 0) (< .cse1 .cse0) (= .cse2 .cse3) (<= 4294967296 .cse2)))) (forall ((v_z_421 Int) (v_y_421 Int)) (let ((.cse5 (+ (* v_y_421 4294967296) (* 2863311531 v_z_421))) (.cse6 (+ .cse4 v_z_421))) (or (< .cse5 0) (< .cse1 .cse5) (<= 4294967296 v_z_421) (= .cse6 (+ .cse3 4294967296)) (< .cse6 4294967296))))))) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:19:16,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:19:19,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:19:21,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:19:23,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:19:24,375 INFO L124 PetriNetUnfolderBase]: 1205/2349 cut-off events. [2023-08-26 13:19:24,375 INFO L125 PetriNetUnfolderBase]: For 109274/109274 co-relation queries the response was YES. [2023-08-26 13:19:24,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23827 conditions, 2349 events. 1205/2349 cut-off events. For 109274/109274 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 15840 event pairs, 460 based on Foata normal form. 3/2338 useless extension candidates. Maximal degree in co-relation 23695. Up to 2221 conditions per place. [2023-08-26 13:19:24,403 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 519 selfloop transitions, 30 changer transitions 9/558 dead transitions. [2023-08-26 13:19:24,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 558 transitions, 10495 flow [2023-08-26 13:19:24,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:19:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:19:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 865 transitions. [2023-08-26 13:19:24,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2023-08-26 13:19:24,410 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 865 transitions. [2023-08-26 13:19:24,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 865 transitions. [2023-08-26 13:19:24,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:19:24,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 865 transitions. [2023-08-26 13:19:24,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.53846153846153) internal successors, (865), 13 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:24,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:24,413 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:24,413 INFO L175 Difference]: Start difference. First operand has 413 places, 508 transitions, 8497 flow. Second operand 13 states and 865 transitions. [2023-08-26 13:19:24,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 558 transitions, 10495 flow [2023-08-26 13:19:24,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 558 transitions, 10052 flow, removed 167 selfloop flow, removed 9 redundant places. [2023-08-26 13:19:24,951 INFO L231 Difference]: Finished difference. Result has 424 places, 522 transitions, 8591 flow [2023-08-26 13:19:24,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=8079, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8591, PETRI_PLACES=424, PETRI_TRANSITIONS=522} [2023-08-26 13:19:24,952 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 396 predicate places. [2023-08-26 13:19:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 522 transitions, 8591 flow [2023-08-26 13:19:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.27777777777778) internal successors, (1139), 18 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:19:24,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:19:24,952 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:19:24,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-26 13:19:25,157 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,SelfDestructingSolverStorable45 [2023-08-26 13:19:25,157 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:19:25,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:19:25,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1265578549, now seen corresponding path program 8 times [2023-08-26 13:19:25,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:19:25,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976831063] [2023-08-26 13:19:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:19:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:19:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:19:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:19:25,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:19:25,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976831063] [2023-08-26 13:19:25,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976831063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:19:25,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975350404] [2023-08-26 13:19:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:19:25,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:19:25,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:19:25,381 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) [2023-08-26 13:19:25,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-26 13:19:25,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:19:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:19:25,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 13:19:25,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:19:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:19:27,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:20:13,547 WARN L234 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:20:15,887 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_425 Int) (v_z_425 Int)) (let ((.cse0 (+ (* 2863311531 v_z_425) (* v_y_425 4294967296)))) (or (<= 4294967296 v_z_425) (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_425)) (< v_z_425 0) (< 0 .cse0) (< .cse0 0)))) is different from false [2023-08-26 13:20:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:20:17,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975350404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:20:17,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:20:17,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 20 [2023-08-26 13:20:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305239662] [2023-08-26 13:20:17,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:20:17,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 13:20:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:20:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 13:20:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=319, Unknown=11, NotChecked=38, Total=462 [2023-08-26 13:20:17,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:20:17,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 522 transitions, 8591 flow. Second operand has 22 states, 22 states have (on average 61.0) internal successors, (1342), 22 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:20:17,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:20:17,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:20:17,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:20:19,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:20:21,995 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_425 Int) (v_z_425 Int)) (let ((.cse0 (+ (* 2863311531 v_z_425) (* v_y_425 4294967296)))) (or (<= 4294967296 v_z_425) (= (mod c_~x_1~0 4294967296) (+ (mod c_~x_2~0 4294967296) v_z_425)) (< v_z_425 0) (< 0 .cse0) (< .cse0 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:20:24,104 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_y_425 Int) (v_z_425 Int)) (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_425)) (.cse2 (+ (* 2863311531 v_z_425) (* v_y_425 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (<= 4294967296 v_z_425) (= .cse0 .cse1) (< v_z_425 0) (< 0 .cse2) (< .cse2 0)))) (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296))) (= c_~x_2~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-08-26 13:20:26,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:20:28,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:20:30,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:20:46,365 WARN L234 SmtUtils]: Spent 12.71s on a formula simplification. DAG size of input: 52 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:20:48,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:20:50,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:14,842 WARN L234 SmtUtils]: Spent 20.16s on a formula simplification. DAG size of input: 41 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:21:16,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:19,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:21,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:21:23,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:29,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:31,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:33,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:35,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:37,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:39,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:41,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:43,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:45,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:47,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:49,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:51,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:53,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:55,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:57,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:21:59,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 13:22:01,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:22:04,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:22:06,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:22:08,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:22:10,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 13:22:10,879 INFO L124 PetriNetUnfolderBase]: 1335/2640 cut-off events. [2023-08-26 13:22:10,879 INFO L125 PetriNetUnfolderBase]: For 127399/127399 co-relation queries the response was YES. [2023-08-26 13:22:10,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27035 conditions, 2640 events. 1335/2640 cut-off events. For 127399/127399 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18527 event pairs, 335 based on Foata normal form. 5/2629 useless extension candidates. Maximal degree in co-relation 26895. Up to 2235 conditions per place. [2023-08-26 13:22:10,913 INFO L140 encePairwiseOnDemand]: 155/165 looper letters, 541 selfloop transitions, 83 changer transitions 33/657 dead transitions. [2023-08-26 13:22:10,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 657 transitions, 12054 flow [2023-08-26 13:22:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:22:10,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:22:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-08-26 13:22:10,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950757575757576 [2023-08-26 13:22:10,915 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-08-26 13:22:10,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-08-26 13:22:10,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:22:10,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-08-26 13:22:10,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:10,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:10,918 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:10,918 INFO L175 Difference]: Start difference. First operand has 424 places, 522 transitions, 8591 flow. Second operand 16 states and 1043 transitions. [2023-08-26 13:22:10,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 657 transitions, 12054 flow [2023-08-26 13:22:11,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 657 transitions, 11683 flow, removed 160 selfloop flow, removed 5 redundant places. [2023-08-26 13:22:11,562 INFO L231 Difference]: Finished difference. Result has 448 places, 571 transitions, 9317 flow [2023-08-26 13:22:11,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=8238, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9317, PETRI_PLACES=448, PETRI_TRANSITIONS=571} [2023-08-26 13:22:11,562 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 420 predicate places. [2023-08-26 13:22:11,562 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 571 transitions, 9317 flow [2023-08-26 13:22:11,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.0) internal successors, (1342), 22 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:11,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:22:11,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:22:11,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-26 13:22:11,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-26 13:22:11,763 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:22:11,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:22:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 403878647, now seen corresponding path program 27 times [2023-08-26 13:22:11,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:22:11,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833661507] [2023-08-26 13:22:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:22:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:22:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:22:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:12,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:22:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833661507] [2023-08-26 13:22:12,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833661507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:22:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500728701] [2023-08-26 13:22:12,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:22:12,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:22:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:22:12,361 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) [2023-08-26 13:22:12,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-26 13:22:12,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:22:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:22:12,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:22:12,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:22:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:13,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:22:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:16,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500728701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:22:16,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:22:16,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-26 13:22:16,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129065289] [2023-08-26 13:22:16,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:22:16,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:22:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:22:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:22:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-26 13:22:16,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:22:16,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 571 transitions, 9317 flow. Second operand has 21 states, 21 states have (on average 60.80952380952381) internal successors, (1277), 21 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:16,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:22:16,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:22:16,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:22:31,615 INFO L124 PetriNetUnfolderBase]: 1370/2716 cut-off events. [2023-08-26 13:22:31,615 INFO L125 PetriNetUnfolderBase]: For 145913/145913 co-relation queries the response was YES. [2023-08-26 13:22:31,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29271 conditions, 2716 events. 1370/2716 cut-off events. For 145913/145913 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 19304 event pairs, 294 based on Foata normal form. 2/2705 useless extension candidates. Maximal degree in co-relation 29118. Up to 1781 conditions per place. [2023-08-26 13:22:31,646 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 451 selfloop transitions, 231 changer transitions 30/712 dead transitions. [2023-08-26 13:22:31,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 712 transitions, 13523 flow [2023-08-26 13:22:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-26 13:22:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-26 13:22:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2309 transitions. [2023-08-26 13:22:31,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38872053872053874 [2023-08-26 13:22:31,649 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2309 transitions. [2023-08-26 13:22:31,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2309 transitions. [2023-08-26 13:22:31,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:22:31,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2309 transitions. [2023-08-26 13:22:31,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.13888888888889) internal successors, (2309), 36 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:31,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 165.0) internal successors, (6105), 37 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:31,654 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 165.0) internal successors, (6105), 37 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:31,654 INFO L175 Difference]: Start difference. First operand has 448 places, 571 transitions, 9317 flow. Second operand 36 states and 2309 transitions. [2023-08-26 13:22:31,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 712 transitions, 13523 flow [2023-08-26 13:22:32,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 712 transitions, 13416 flow, removed 45 selfloop flow, removed 7 redundant places. [2023-08-26 13:22:32,388 INFO L231 Difference]: Finished difference. Result has 481 places, 610 transitions, 11234 flow [2023-08-26 13:22:32,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=9252, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11234, PETRI_PLACES=481, PETRI_TRANSITIONS=610} [2023-08-26 13:22:32,389 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 453 predicate places. [2023-08-26 13:22:32,389 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 610 transitions, 11234 flow [2023-08-26 13:22:32,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.80952380952381) internal successors, (1277), 21 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:32,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:22:32,389 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:22:32,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-26 13:22:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:22:32,594 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:22:32,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:22:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1654482909, now seen corresponding path program 28 times [2023-08-26 13:22:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:22:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714611572] [2023-08-26 13:22:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:22:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:22:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:22:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:33,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:22:33,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714611572] [2023-08-26 13:22:33,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714611572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:22:33,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685890801] [2023-08-26 13:22:33,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:22:33,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:22:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:22:33,389 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) [2023-08-26 13:22:33,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-26 13:22:33,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:22:33,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:22:33,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:22:33,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:22:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:22:36,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:22:41,232 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (.cse0 (mod (+ 2 c_thread1Thread1of1ForFork0_~i~0) 4294967296)) (.cse1 (mod c_~x_2~0 4294967296)) (.cse2 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse5 (* (div c_~x_2~0 4294967296) 4294967296))) (and (or (< (* (div (+ .cse0 .cse1) 4294967296) 4294967296) (+ 2 .cse2)) (forall ((v_z_454 Int)) (or (<= v_z_454 .cse3) (let ((.cse4 (* 2 v_z_454))) (< (+ .cse4 (* (div (+ (- 1) .cse1) 4294967296) 4294967296) c_~x_1~0 4294967294 .cse5) (+ c_~x_2~0 (* (div (+ .cse4 c_~x_1~0) 4294967296) 4294967296) .cse2))) (< .cse6 v_z_454)))) (forall ((v_z_456 Int)) (or (<= v_z_456 .cse3) (< .cse6 v_z_456) (let ((.cse7 (* 2 v_z_456))) (< (+ .cse7 c_~x_1~0 .cse5) (+ c_~x_2~0 2 .cse2 (* (div (+ .cse7 c_~x_1~0) 4294967296) 4294967296)))))) (forall ((v_z_457 Int)) (or (< .cse6 v_z_457) (<= v_z_457 .cse3) (< (+ (* (div (+ (* 2 v_z_457) c_~x_1~0) 4294967296) 4294967296) 4294967294 (* (div (+ (- 1) (* (- 2) v_z_457) c_~x_2~0 .cse0 (* (- 1) c_~x_1~0)) 4294967296) 4294967296)) (+ .cse1 .cse2 .cse5)))))) is different from false [2023-08-26 13:22:43,299 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)) (.cse4 (mod c_~x_2~0 4294967296)) (.cse2 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse3 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296))) (and (forall ((v_z_456 Int)) (or (<= v_z_456 .cse0) (let ((.cse1 (* 2 v_z_456))) (< (+ .cse1 c_~x_1~0 .cse2) (+ c_~x_2~0 3 (* (div (+ .cse1 c_~x_1~0) 4294967296) 4294967296)))) (< .cse3 v_z_456))) (forall ((v_z_457 Int)) (or (< .cse3 v_z_457) (<= v_z_457 .cse0) (< (+ (* (div (+ (* (- 2) v_z_457) c_~x_2~0 (* (- 1) c_~x_1~0) 1) 4294967296) 4294967296) (* (div (+ (* 2 v_z_457) c_~x_1~0) 4294967296) 4294967296) 4294967293) (+ .cse4 .cse2)))) (or (< (div (+ 2 .cse4) 4294967296) 1) (forall ((v_z_454 Int)) (or (<= v_z_454 .cse0) (let ((.cse5 (* 2 v_z_454))) (< (+ .cse5 (* (div (+ (- 1) .cse4) 4294967296) 4294967296) c_~x_1~0 .cse2 4294967293) (+ c_~x_2~0 (* (div (+ .cse5 c_~x_1~0) 4294967296) 4294967296)))) (< .cse3 v_z_454)))))) is different from false [2023-08-26 13:22:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-26 13:22:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685890801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:22:43,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:22:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:22:43,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090621332] [2023-08-26 13:22:43,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:22:43,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:22:43,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:22:43,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:22:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=245, Unknown=2, NotChecked=66, Total=380 [2023-08-26 13:22:43,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:22:43,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 610 transitions, 11234 flow. Second operand has 20 states, 20 states have (on average 60.85) internal successors, (1217), 20 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:22:43,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:22:43,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:22:43,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:04,346 WARN L234 SmtUtils]: Spent 20.63s on a formula simplification. DAG size of input: 94 DAG size of output: 14 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 13:23:09,045 INFO L124 PetriNetUnfolderBase]: 1362/2703 cut-off events. [2023-08-26 13:23:09,045 INFO L125 PetriNetUnfolderBase]: For 145404/145404 co-relation queries the response was YES. [2023-08-26 13:23:09,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29746 conditions, 2703 events. 1362/2703 cut-off events. For 145404/145404 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19116 event pairs, 341 based on Foata normal form. 2/2693 useless extension candidates. Maximal degree in co-relation 29588. Up to 2574 conditions per place. [2023-08-26 13:23:09,079 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 551 selfloop transitions, 82 changer transitions 11/644 dead transitions. [2023-08-26 13:23:09,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 644 transitions, 13045 flow [2023-08-26 13:23:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 13:23:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 13:23:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1202 transitions. [2023-08-26 13:23:09,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38341307814992026 [2023-08-26 13:23:09,081 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1202 transitions. [2023-08-26 13:23:09,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1202 transitions. [2023-08-26 13:23:09,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:09,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1202 transitions. [2023-08-26 13:23:09,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 63.26315789473684) internal successors, (1202), 19 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:09,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:09,084 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:09,084 INFO L175 Difference]: Start difference. First operand has 481 places, 610 transitions, 11234 flow. Second operand 19 states and 1202 transitions. [2023-08-26 13:23:09,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 644 transitions, 13045 flow [2023-08-26 13:23:10,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 644 transitions, 11899 flow, removed 483 selfloop flow, removed 19 redundant places. [2023-08-26 13:23:10,105 INFO L231 Difference]: Finished difference. Result has 482 places, 618 transitions, 10524 flow [2023-08-26 13:23:10,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=10088, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10524, PETRI_PLACES=482, PETRI_TRANSITIONS=618} [2023-08-26 13:23:10,106 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 454 predicate places. [2023-08-26 13:23:10,106 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 618 transitions, 10524 flow [2023-08-26 13:23:10,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.85) internal successors, (1217), 20 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:10,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:10,107 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:10,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-26 13:23:10,312 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,SelfDestructingSolverStorable48 [2023-08-26 13:23:10,313 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:10,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1935122117, now seen corresponding path program 9 times [2023-08-26 13:23:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:10,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468031735] [2023-08-26 13:23:10,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:10,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468031735] [2023-08-26 13:23:10,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468031735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:10,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139206897] [2023-08-26 13:23:10,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:23:10,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:10,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:10,495 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) [2023-08-26 13:23:10,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-26 13:23:10,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:23:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:10,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 13:23:10,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:10,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:21,263 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse3 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_462 Int) (v_y_462 Int)) (let ((.cse1 (+ .cse3 v_z_462)) (.cse2 (+ (* v_y_462 4294967296) (* 2863311531 v_z_462)))) (or (= (+ .cse0 4294967296) .cse1) (= .cse0 .cse1) (< .cse2 0) (<= 4294967296 v_z_462) (< v_z_462 0) (< 0 .cse2)))) (forall ((v_z_462 Int) (v_y_462 Int)) (let ((.cse4 (+ .cse3 v_z_462)) (.cse5 (+ (* v_y_462 4294967296) (* 2863311531 v_z_462)))) (or (<= 4294967296 .cse4) (= .cse0 .cse4) (< .cse5 0) (< v_z_462 0) (< 0 .cse5)))))) is different from false [2023-08-26 13:23:27,521 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_462 Int) (v_y_462 Int)) (let ((.cse2 (+ (* v_y_462 4294967296) (* 2863311531 v_z_462)))) (or (= .cse0 (+ .cse1 v_z_462)) (< .cse2 0) (<= 4294967296 v_z_462) (< v_z_462 0) (< 0 .cse2)))) (forall ((v_z_462 Int) (v_y_462 Int)) (let ((.cse3 (+ .cse1 v_z_462)) (.cse4 (+ (* v_y_462 4294967296) (* 2863311531 v_z_462)))) (or (<= 4294967296 .cse3) (= .cse0 .cse3) (< .cse4 0) (< v_z_462 0) (< 0 .cse4)))))) is different from false [2023-08-26 13:23:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-26 13:23:37,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139206897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:37,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:37,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 15 [2023-08-26 13:23:37,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256902748] [2023-08-26 13:23:37,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 13:23:37,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:37,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 13:23:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=153, Unknown=2, NotChecked=54, Total=272 [2023-08-26 13:23:37,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 13:23:37,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 618 transitions, 10524 flow. Second operand has 17 states, 17 states have (on average 69.23529411764706) internal successors, (1177), 17 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:37,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:37,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 13:23:37,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:39,856 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~x_1~0 4294967296)) (.cse1 (mod c_~x_2~0 4294967296))) (and (forall ((v_z_462 Int) (v_y_462 Int)) (let ((.cse2 (+ (* v_y_462 4294967296) (* 2863311531 v_z_462)))) (or (= .cse0 (+ .cse1 v_z_462)) (< .cse2 0) (<= 4294967296 v_z_462) (< v_z_462 0) (< 0 .cse2)))) (= c_~x_2~0 0) (forall ((v_z_462 Int) (v_y_462 Int)) (let ((.cse3 (+ .cse1 v_z_462)) (.cse4 (+ (* v_y_462 4294967296) (* 2863311531 v_z_462)))) (or (<= 4294967296 .cse3) (= .cse0 .cse3) (< .cse4 0) (< v_z_462 0) (< 0 .cse4)))) (= c_~x_1~0 0))) is different from false [2023-08-26 13:23:41,625 INFO L124 PetriNetUnfolderBase]: 1404/2795 cut-off events. [2023-08-26 13:23:41,625 INFO L125 PetriNetUnfolderBase]: For 108852/108862 co-relation queries the response was YES. [2023-08-26 13:23:41,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28582 conditions, 2795 events. 1404/2795 cut-off events. For 108852/108862 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19991 event pairs, 356 based on Foata normal form. 16/2786 useless extension candidates. Maximal degree in co-relation 28423. Up to 2352 conditions per place. [2023-08-26 13:23:41,725 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 494 selfloop transitions, 100 changer transitions 52/658 dead transitions. [2023-08-26 13:23:41,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 658 transitions, 12502 flow [2023-08-26 13:23:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 13:23:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 13:23:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1080 transitions. [2023-08-26 13:23:41,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2023-08-26 13:23:41,734 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1080 transitions. [2023-08-26 13:23:41,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1080 transitions. [2023-08-26 13:23:41,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:41,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1080 transitions. [2023-08-26 13:23:41,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 72.0) internal successors, (1080), 15 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,737 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,737 INFO L175 Difference]: Start difference. First operand has 482 places, 618 transitions, 10524 flow. Second operand 15 states and 1080 transitions. [2023-08-26 13:23:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 658 transitions, 12502 flow [2023-08-26 13:23:42,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 658 transitions, 12169 flow, removed 100 selfloop flow, removed 14 redundant places. [2023-08-26 13:23:42,574 INFO L231 Difference]: Finished difference. Result has 484 places, 597 transitions, 10260 flow [2023-08-26 13:23:42,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=10195, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10260, PETRI_PLACES=484, PETRI_TRANSITIONS=597} [2023-08-26 13:23:42,575 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 456 predicate places. [2023-08-26 13:23:42,575 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 597 transitions, 10260 flow [2023-08-26 13:23:42,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.23529411764706) internal successors, (1177), 17 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:42,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:42,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-26 13:23:42,783 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,SelfDestructingSolverStorable49 [2023-08-26 13:23:42,783 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:42,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1018715189, now seen corresponding path program 29 times [2023-08-26 13:23:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:42,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251478714] [2023-08-26 13:23:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:42,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:43,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:43,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251478714] [2023-08-26 13:23:43,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251478714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:43,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270678770] [2023-08-26 13:23:43,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:23:43,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:43,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:43,661 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) [2023-08-26 13:23:43,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-26 13:23:43,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:23:43,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:43,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:23:43,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:44,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270678770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:46,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:46,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:23:46,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643608959] [2023-08-26 13:23:46,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:46,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:23:46,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:23:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:23:46,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:23:46,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 597 transitions, 10260 flow. Second operand has 20 states, 20 states have (on average 60.95) internal successors, (1219), 20 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:46,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:46,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:23:46,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:49,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:23:51,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:23:54,471 INFO L124 PetriNetUnfolderBase]: 1347/2627 cut-off events. [2023-08-26 13:23:54,471 INFO L125 PetriNetUnfolderBase]: For 114140/114140 co-relation queries the response was YES. [2023-08-26 13:23:54,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27722 conditions, 2627 events. 1347/2627 cut-off events. For 114140/114140 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18084 event pairs, 265 based on Foata normal form. 2/2617 useless extension candidates. Maximal degree in co-relation 27560. Up to 2119 conditions per place. [2023-08-26 13:23:54,518 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 488 selfloop transitions, 162 changer transitions 16/666 dead transitions. [2023-08-26 13:23:54,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 666 transitions, 12946 flow [2023-08-26 13:23:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 13:23:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 13:23:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1472 transitions. [2023-08-26 13:23:54,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-08-26 13:23:54,521 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1472 transitions. [2023-08-26 13:23:54,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1472 transitions. [2023-08-26 13:23:54,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:54,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1472 transitions. [2023-08-26 13:23:54,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.0) internal successors, (1472), 23 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:54,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:54,526 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:54,526 INFO L175 Difference]: Start difference. First operand has 484 places, 597 transitions, 10260 flow. Second operand 23 states and 1472 transitions. [2023-08-26 13:23:54,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 666 transitions, 12946 flow [2023-08-26 13:23:55,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 666 transitions, 12581 flow, removed 25 selfloop flow, removed 20 redundant places. [2023-08-26 13:23:55,282 INFO L231 Difference]: Finished difference. Result has 479 places, 613 transitions, 10988 flow [2023-08-26 13:23:55,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=9895, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10988, PETRI_PLACES=479, PETRI_TRANSITIONS=613} [2023-08-26 13:23:55,282 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 451 predicate places. [2023-08-26 13:23:55,283 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 613 transitions, 10988 flow [2023-08-26 13:23:55,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.95) internal successors, (1219), 20 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:55,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:55,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:55,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-26 13:23:55,483 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,SelfDestructingSolverStorable50 [2023-08-26 13:23:55,483 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 13:23:55,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1378863085, now seen corresponding path program 30 times [2023-08-26 13:23:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:55,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181686203] [2023-08-26 13:23:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:55,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:56,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:56,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181686203] [2023-08-26 13:23:56,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181686203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:56,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815816614] [2023-08-26 13:23:56,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:23:56,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:56,348 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) [2023-08-26 13:23:56,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-26 13:23:56,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:23:56,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:56,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 13:23:56,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:57,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:59,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815816614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:59,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:59,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 13:23:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197560064] [2023-08-26 13:23:59,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:59,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 13:23:59,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:59,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 13:23:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-08-26 13:23:59,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 13:23:59,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 613 transitions, 10988 flow. Second operand has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:59,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:59,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 13:23:59,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 13:24:05,076 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:24:05,076 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 [2023-08-26 13:24:05,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 13:24:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 13:24:05,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 13:24:05,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-26 13:24:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:24:05,536 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). [2023-08-26 13:24:05,537 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 13:24:05,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 13:24:05,538 INFO L445 BasicCegarLoop]: Path program histogram: [30, 9, 7, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:05,541 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:24:05,541 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:24:05,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:24:05 BasicIcfg [2023-08-26 13:24:05,543 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:24:05,543 INFO L158 Benchmark]: Toolchain (without parser) took 847356.39ms. Allocated memory was 335.5MB in the beginning and 549.5MB in the end (delta: 213.9MB). Free memory was 311.7MB in the beginning and 227.3MB in the end (delta: 84.4MB). Peak memory consumption was 300.7MB. Max. memory is 16.0GB. [2023-08-26 13:24:05,543 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 335.5MB. Free memory is still 311.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:05,543 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.49ms. Allocated memory is still 335.5MB. Free memory was 311.7MB in the beginning and 300.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 13:24:05,544 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.75ms. Allocated memory is still 335.5MB. Free memory was 300.8MB in the beginning and 299.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:24:05,544 INFO L158 Benchmark]: Boogie Preprocessor took 18.00ms. Allocated memory is still 335.5MB. Free memory was 299.4MB in the beginning and 298.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:24:05,544 INFO L158 Benchmark]: RCFGBuilder took 370.94ms. Allocated memory is still 335.5MB. Free memory was 297.8MB in the beginning and 284.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 13:24:05,544 INFO L158 Benchmark]: TraceAbstraction took 846717.05ms. Allocated memory was 335.5MB in the beginning and 549.5MB in the end (delta: 213.9MB). Free memory was 283.6MB in the beginning and 227.3MB in the end (delta: 56.4MB). Peak memory consumption was 273.4MB. Max. memory is 16.0GB. [2023-08-26 13:24:05,545 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 335.5MB. Free memory is still 311.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 218.49ms. Allocated memory is still 335.5MB. Free memory was 311.7MB in the beginning and 300.8MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.75ms. Allocated memory is still 335.5MB. Free memory was 300.8MB in the beginning and 299.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.00ms. Allocated memory is still 335.5MB. Free memory was 299.4MB in the beginning and 298.3MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 370.94ms. Allocated memory is still 335.5MB. Free memory was 297.8MB in the beginning and 284.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 846717.05ms. Allocated memory was 335.5MB in the beginning and 549.5MB in the end (delta: 213.9MB). Free memory was 283.6MB in the beginning and 227.3MB in the end (delta: 56.4MB). Peak memory consumption was 273.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 79 PlacesBefore, 28 PlacesAfterwards, 77 TransitionsBefore, 23 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 77 TotalNumberOfCompositions, 715 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 715, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 374, independent: 374, independent conditional: 0, independent unconditional: 374, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 715, independent: 341, independent conditional: 0, independent unconditional: 341, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 374, unknown conditional: 0, unknown unconditional: 374] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 59/165 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 1187 conditions, 93 events (38/92 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 487 event pairs, 7 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 1025. Up to 44 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 106 locations, 11 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: 846.6s, OverallIterations: 52, TraceHistogramMax: 3, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 456.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 97 mSolverCounterUnknown, 2438 SdHoareTripleChecker+Valid, 270.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2438 mSDsluCounter, 783 SdHoareTripleChecker+Invalid, 266.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2461 IncrementalHoareTripleChecker+Unchecked, 615 mSDsCounter, 759 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19476 IncrementalHoareTripleChecker+Invalid, 22793 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 759 mSolverCounterUnsat, 168 mSDtfsCounter, 19476 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 808 SyntacticMatches, 109 SemanticMatches, 1090 ConstructedPredicates, 32 IntricatePredicates, 0 DeprecatedPredicates, 8324 ImplicationChecksByTransitivity, 340.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11234occurred in iteration=48, InterpolantAutomatonStates: 880, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 372.0s InterpolantComputationTime, 1440 NumberOfCodeBlocks, 1440 NumberOfCodeBlocksAsserted, 146 NumberOfCheckSat, 2001 ConstructedInterpolants, 88 QuantifiedInterpolants, 60342 SizeOfPredicates, 173 NumberOfNonLiveVariables, 5963 ConjunctsInSsa, 1097 ConjunctsInUnsatCore, 144 InterpolantComputations, 6 PerfectInterpolantSequences, 5/438 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