/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -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/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:29:44,566 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:29:44,645 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 16:29:44,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:29:44,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:29:44,681 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:29:44,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:29:44,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:29:44,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:29:44,686 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:29:44,686 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:29:44,686 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:29:44,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:29:44,688 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:29:44,688 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:29:44,688 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:29:44,688 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:29:44,689 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:29:44,689 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:29:44,689 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:29:44,689 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:29:44,690 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:29:44,690 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:29:44,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:29:44,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:29:44,691 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:29:44,691 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:29:44,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:29:44,692 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:29:44,692 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:29:44,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:29:44,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:29:44,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:29:44,693 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:29:44,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:29:44,694 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:29:44,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:29:44,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:29:44,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:29:44,997 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:29:44,998 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:29:44,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-26 16:29:46,203 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:29:46,417 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:29:46,417 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-26 16:29:46,423 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561d20ab8/8f8d755ba5064116971bcc95de1ab755/FLAG2fca12303 [2023-08-26 16:29:46,434 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561d20ab8/8f8d755ba5064116971bcc95de1ab755 [2023-08-26 16:29:46,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:29:46,437 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:29:46,438 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:29:46,438 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:29:46,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:29:46,440 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,441 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39eb91a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46, skipping insertion in model container [2023-08-26 16:29:46,441 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,458 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:29:46,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:29:46,625 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:29:46,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:29:46,669 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:29:46,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46 WrapperNode [2023-08-26 16:29:46,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:29:46,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:29:46,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:29:46,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:29:46,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,692 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,718 INFO L138 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-08-26 16:29:46,719 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:29:46,720 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:29:46,720 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:29:46,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:29:46,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,732 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,732 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,749 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:29:46,757 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:29:46,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:29:46,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:29:46,758 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (1/1) ... [2023-08-26 16:29:46,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:29:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:29:46,790 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 16:29:46,825 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 16:29:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:29:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 16:29:46,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 16:29:46,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 16:29:46,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 16:29:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:29:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:29:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:29:46,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:29:46,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:29:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:29:46,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:29:46,838 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 16:29:46,940 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:29:46,941 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:29:47,174 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:29:47,181 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:29:47,181 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 16:29:47,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:29:47 BoogieIcfgContainer [2023-08-26 16:29:47,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:29:47,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:29:47,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:29:47,187 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:29:47,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:29:46" (1/3) ... [2023-08-26 16:29:47,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3130259a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:29:47, skipping insertion in model container [2023-08-26 16:29:47,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:29:46" (2/3) ... [2023-08-26 16:29:47,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3130259a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:29:47, skipping insertion in model container [2023-08-26 16:29:47,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:29:47" (3/3) ... [2023-08-26 16:29:47,190 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-08-26 16:29:47,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:29:47,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 16:29:47,205 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:29:47,272 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 16:29:47,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 272 flow [2023-08-26 16:29:47,349 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-08-26 16:29:47,349 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:29:47,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 110 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 16:29:47,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 128 transitions, 272 flow [2023-08-26 16:29:47,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 117 transitions, 246 flow [2023-08-26 16:29:47,361 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:29:47,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-26 16:29:47,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-26 16:29:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 246 flow [2023-08-26 16:29:47,422 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-08-26 16:29:47,423 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:29:47,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 16:29:47,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 972 [2023-08-26 16:29:51,205 INFO L134 LiptonReduction]: Checked pairs total: 991 [2023-08-26 16:29:51,206 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-26 16:29:51,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:29:51,230 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;@55ca3cd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:29:51,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 16:29:51,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:29:51,232 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 16:29:51,232 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:29:51,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:51,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:29:51,233 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 16:29:51,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 473, now seen corresponding path program 1 times [2023-08-26 16:29:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:51,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983562624] [2023-08-26 16:29:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:51,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:51,323 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 16:29:51,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:51,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983562624] [2023-08-26 16:29:51,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983562624] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:51,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:29:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603840411] [2023-08-26 16:29:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:51,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:29:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:29:51,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:29:51,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 248 [2023-08-26 16:29:51,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 16:29:51,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:51,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 248 [2023-08-26 16:29:51,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:51,397 INFO L124 PetriNetUnfolderBase]: 75/122 cut-off events. [2023-08-26 16:29:51,398 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:29:51,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 122 events. 75/122 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 258 event pairs, 35 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 210. Up to 123 conditions per place. [2023-08-26 16:29:51,400 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 16:29:51,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 96 flow [2023-08-26 16:29:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:29:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:29:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 257 transitions. [2023-08-26 16:29:51,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181451612903226 [2023-08-26 16:29:51,412 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 257 transitions. [2023-08-26 16:29:51,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 257 transitions. [2023-08-26 16:29:51,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:51,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 257 transitions. [2023-08-26 16:29:51,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 16:29:51,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 16:29:51,422 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states 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 16:29:51,423 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 58 flow. Second operand 2 states and 257 transitions. [2023-08-26 16:29:51,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 96 flow [2023-08-26 16:29:51,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 16:29:51,427 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2023-08-26 16:29:51,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, 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=22, PETRI_TRANSITIONS=21} [2023-08-26 16:29:51,431 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-26 16:29:51,431 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2023-08-26 16:29:51,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 16:29:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:29:51,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:29:51,432 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 16:29:51,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 465912, now seen corresponding path program 1 times [2023-08-26 16:29:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138188141] [2023-08-26 16:29:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:51,562 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 16:29:51,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:51,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138188141] [2023-08-26 16:29:51,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138188141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:51,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:29:51,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853605566] [2023-08-26 16:29:51,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:51,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:29:51,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:29:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:29:51,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 248 [2023-08-26 16:29:51,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 16:29:51,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:51,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 248 [2023-08-26 16:29:51,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:51,615 INFO L124 PetriNetUnfolderBase]: 69/111 cut-off events. [2023-08-26 16:29:51,615 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:29:51,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 111 events. 69/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 225 event pairs, 32 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 226. Up to 111 conditions per place. [2023-08-26 16:29:51,617 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 16:29:51,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 19 transitions, 80 flow [2023-08-26 16:29:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:29:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:29:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-26 16:29:51,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2023-08-26 16:29:51,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-26 16:29:51,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-26 16:29:51,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:51,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-26 16:29:51,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 16:29:51,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:51,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:51,629 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 315 transitions. [2023-08-26 16:29:51,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 19 transitions, 80 flow [2023-08-26 16:29:51,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:29:51,630 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 44 flow [2023-08-26 16:29:51,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=22, PETRI_TRANSITIONS=19} [2023-08-26 16:29:51,631 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2023-08-26 16:29:51,632 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 44 flow [2023-08-26 16:29:51,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states 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 16:29:51,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:51,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:29:51,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:29:51,636 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 16:29:51,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash 465910, now seen corresponding path program 1 times [2023-08-26 16:29:51,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:51,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011143462] [2023-08-26 16:29:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:51,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:51,831 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 16:29:51,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:51,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011143462] [2023-08-26 16:29:51,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011143462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:51,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:51,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:29:51,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775658509] [2023-08-26 16:29:51,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:51,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:29:51,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:51,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:29:51,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:29:51,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 248 [2023-08-26 16:29:51,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:51,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:51,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 248 [2023-08-26 16:29:51,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:51,872 INFO L124 PetriNetUnfolderBase]: 63/100 cut-off events. [2023-08-26 16:29:51,872 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:29:51,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 100 events. 63/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 197 event pairs, 29 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 205. Up to 100 conditions per place. [2023-08-26 16:29:51,873 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 16:29:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-08-26 16:29:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:29:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:29:51,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-26 16:29:51,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42876344086021506 [2023-08-26 16:29:51,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-26 16:29:51,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-26 16:29:51,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:51,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-26 16:29:51,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states 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 16:29:51,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:51,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:51,878 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 44 flow. Second operand 3 states and 319 transitions. [2023-08-26 16:29:51,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-08-26 16:29:51,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:29:51,879 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 41 flow [2023-08-26 16:29:51,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=21, PETRI_TRANSITIONS=17} [2023-08-26 16:29:51,880 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 16:29:51,880 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 41 flow [2023-08-26 16:29:51,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:51,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:51,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:29:51,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:29:51,881 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 16:29:51,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash 447750795, now seen corresponding path program 1 times [2023-08-26 16:29:51,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:51,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664402289] [2023-08-26 16:29:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:52,060 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 16:29:52,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:52,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664402289] [2023-08-26 16:29:52,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664402289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:52,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:52,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:29:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136787290] [2023-08-26 16:29:52,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:52,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:29:52,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:29:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:29:52,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 248 [2023-08-26 16:29:52,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 16:29:52,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:52,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 248 [2023-08-26 16:29:52,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:52,100 INFO L124 PetriNetUnfolderBase]: 49/80 cut-off events. [2023-08-26 16:29:52,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:29:52,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 80 events. 49/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 138 event pairs, 22 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 166. Up to 80 conditions per place. [2023-08-26 16:29:52,101 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 16:29:52,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 16 transitions, 71 flow [2023-08-26 16:29:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:29:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:29:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-26 16:29:52,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099462365591398 [2023-08-26 16:29:52,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-26 16:29:52,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-26 16:29:52,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:52,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-26 16:29:52,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 16:29:52,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:52,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:52,107 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 41 flow. Second operand 3 states and 305 transitions. [2023-08-26 16:29:52,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 16 transitions, 71 flow [2023-08-26 16:29:52,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:29:52,108 INFO L231 Difference]: Finished difference. Result has 21 places, 16 transitions, 40 flow [2023-08-26 16:29:52,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=21, PETRI_TRANSITIONS=16} [2023-08-26 16:29:52,109 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 16:29:52,109 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 16 transitions, 40 flow [2023-08-26 16:29:52,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 16:29:52,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:52,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:29:52,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:29:52,110 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 16:29:52,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash 447750794, now seen corresponding path program 1 times [2023-08-26 16:29:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:52,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160247095] [2023-08-26 16:29:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:52,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:52,166 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 16:29:52,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:52,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160247095] [2023-08-26 16:29:52,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160247095] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:52,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:52,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:29:52,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579106239] [2023-08-26 16:29:52,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:52,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:29:52,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:29:52,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:29:52,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 248 [2023-08-26 16:29:52,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 16:29:52,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:52,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 248 [2023-08-26 16:29:52,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:52,211 INFO L124 PetriNetUnfolderBase]: 35/60 cut-off events. [2023-08-26 16:29:52,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:29:52,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 60 events. 35/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 85 event pairs, 15 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 127. Up to 60 conditions per place. [2023-08-26 16:29:52,214 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 16:29:52,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 68 flow [2023-08-26 16:29:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:29:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:29:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2023-08-26 16:29:52,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40456989247311825 [2023-08-26 16:29:52,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2023-08-26 16:29:52,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2023-08-26 16:29:52,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:52,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2023-08-26 16:29:52,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states 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 16:29:52,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:52,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:52,221 INFO L175 Difference]: Start difference. First operand has 21 places, 16 transitions, 40 flow. Second operand 3 states and 301 transitions. [2023-08-26 16:29:52,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 68 flow [2023-08-26 16:29:52,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:29:52,222 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 39 flow [2023-08-26 16:29:52,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=19, 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=21, PETRI_TRANSITIONS=15} [2023-08-26 16:29:52,224 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-26 16:29:52,225 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 39 flow [2023-08-26 16:29:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 16:29:52,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:52,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:52,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:29:52,226 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 16:29:52,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1812774620, now seen corresponding path program 1 times [2023-08-26 16:29:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828414214] [2023-08-26 16:29:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:52,514 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 16:29:52,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828414214] [2023-08-26 16:29:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828414214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:52,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:52,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:29:52,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955644401] [2023-08-26 16:29:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:29:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:29:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:29:52,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 248 [2023-08-26 16:29:52,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 16:29:52,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:52,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 248 [2023-08-26 16:29:52,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:52,583 INFO L124 PetriNetUnfolderBase]: 69/117 cut-off events. [2023-08-26 16:29:52,583 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 16:29:52,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 117 events. 69/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 282 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 245. Up to 73 conditions per place. [2023-08-26 16:29:52,584 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-26 16:29:52,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 120 flow [2023-08-26 16:29:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:29:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:29:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-26 16:29:52,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44489247311827956 [2023-08-26 16:29:52,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-26 16:29:52,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-26 16:29:52,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:52,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-26 16:29:52,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 16:29:52,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:52,589 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states 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 16:29:52,589 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 39 flow. Second operand 3 states and 331 transitions. [2023-08-26 16:29:52,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 120 flow [2023-08-26 16:29:52,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 119 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:29:52,590 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 57 flow [2023-08-26 16:29:52,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=38, 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=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-26 16:29:52,593 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -4 predicate places. [2023-08-26 16:29:52,595 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 57 flow [2023-08-26 16:29:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 16:29:52,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:52,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:52,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:29:52,596 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 16:29:52,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:52,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1547196692, now seen corresponding path program 1 times [2023-08-26 16:29:52,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:52,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323239265] [2023-08-26 16:29:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:52,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:29:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:52,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323239265] [2023-08-26 16:29:52,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323239265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:52,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:52,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:29:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924667238] [2023-08-26 16:29:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:29:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:29:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:29:52,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:29:52,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 16:29:52,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:52,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:29:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:52,729 INFO L124 PetriNetUnfolderBase]: 125/216 cut-off events. [2023-08-26 16:29:52,730 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 16:29:52,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 216 events. 125/216 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 677 event pairs, 11 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 522. Up to 79 conditions per place. [2023-08-26 16:29:52,732 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 40 selfloop transitions, 7 changer transitions 2/49 dead transitions. [2023-08-26 16:29:52,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 49 transitions, 246 flow [2023-08-26 16:29:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:29:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:29:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-08-26 16:29:52,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467741935483871 [2023-08-26 16:29:52,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-08-26 16:29:52,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-08-26 16:29:52,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:52,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-08-26 16:29:52,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:52,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:52,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:52,738 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 57 flow. Second operand 5 states and 554 transitions. [2023-08-26 16:29:52,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 49 transitions, 246 flow [2023-08-26 16:29:52,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 49 transitions, 239 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:29:52,740 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 105 flow [2023-08-26 16:29:52,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-08-26 16:29:52,742 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-26 16:29:52,742 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 105 flow [2023-08-26 16:29:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 16:29:52,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:52,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:52,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:29:52,743 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 16:29:52,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:52,743 INFO L85 PathProgramCache]: Analyzing trace with hash -296484170, now seen corresponding path program 2 times [2023-08-26 16:29:52,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:52,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772259631] [2023-08-26 16:29:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:52,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:29:52,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:52,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772259631] [2023-08-26 16:29:52,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772259631] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:52,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:52,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:29:52,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949691659] [2023-08-26 16:29:52,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:52,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:29:52,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:52,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:29:52,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:29:52,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:29:52,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 16:29:52,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:52,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:29:52,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:52,870 INFO L124 PetriNetUnfolderBase]: 125/210 cut-off events. [2023-08-26 16:29:52,870 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-08-26 16:29:52,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 210 events. 125/210 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 632 event pairs, 17 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 654. Up to 92 conditions per place. [2023-08-26 16:29:52,871 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 32 selfloop transitions, 11 changer transitions 6/49 dead transitions. [2023-08-26 16:29:52,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 305 flow [2023-08-26 16:29:52,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:29:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:29:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 549 transitions. [2023-08-26 16:29:52,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.442741935483871 [2023-08-26 16:29:52,873 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 549 transitions. [2023-08-26 16:29:52,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 549 transitions. [2023-08-26 16:29:52,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:52,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 549 transitions. [2023-08-26 16:29:52,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states 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 16:29:52,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:52,877 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:52,877 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 105 flow. Second operand 5 states and 549 transitions. [2023-08-26 16:29:52,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 305 flow [2023-08-26 16:29:52,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 305 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:29:52,883 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 170 flow [2023-08-26 16:29:52,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-08-26 16:29:52,884 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-08-26 16:29:52,884 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 170 flow [2023-08-26 16:29:52,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 16:29:52,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:52,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:52,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 16:29:52,885 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 16:29:52,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash -329297151, now seen corresponding path program 1 times [2023-08-26 16:29:52,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:52,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943571397] [2023-08-26 16:29:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:52,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:29:52,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943571397] [2023-08-26 16:29:52,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943571397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:29:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287417684] [2023-08-26 16:29:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:52,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:29:52,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:29:52,949 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 16:29:52,962 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 16:29:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:53,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 16:29:53,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:29:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:29:53,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:29:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:29:53,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287417684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:29:53,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:29:53,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 16:29:53,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085275661] [2023-08-26 16:29:53,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:29:53,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:29:53,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:29:53,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 16:29:53,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:29:53,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 16:29:53,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:53,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:29:53,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:53,227 INFO L124 PetriNetUnfolderBase]: 131/230 cut-off events. [2023-08-26 16:29:53,227 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2023-08-26 16:29:53,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 230 events. 131/230 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 733 event pairs, 2 based on Foata normal form. 20/250 useless extension candidates. Maximal degree in co-relation 861. Up to 96 conditions per place. [2023-08-26 16:29:53,230 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 43 selfloop transitions, 9 changer transitions 4/56 dead transitions. [2023-08-26 16:29:53,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 419 flow [2023-08-26 16:29:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:29:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:29:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-26 16:29:53,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4459677419354839 [2023-08-26 16:29:53,232 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-26 16:29:53,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-26 16:29:53,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:53,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-26 16:29:53,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states 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 16:29:53,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:53,236 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:53,236 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 170 flow. Second operand 5 states and 553 transitions. [2023-08-26 16:29:53,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 419 flow [2023-08-26 16:29:53,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 413 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 16:29:53,241 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 242 flow [2023-08-26 16:29:53,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=242, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-26 16:29:53,243 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2023-08-26 16:29:53,243 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 242 flow [2023-08-26 16:29:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.0) internal successors, (636), 6 states have internal predecessors, (636), 0 states have call successors, (0), 0 states 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 16:29:53,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:53,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:53,254 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 16:29:53,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:29:53,455 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 16:29:53,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1186717249, now seen corresponding path program 2 times [2023-08-26 16:29:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:53,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766328943] [2023-08-26 16:29:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:29:53,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766328943] [2023-08-26 16:29:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766328943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:29:53,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:29:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:29:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059196201] [2023-08-26 16:29:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:29:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 16:29:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 16:29:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 16:29:53,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:29:53,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 16:29:53,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:53,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:29:53,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:53,578 INFO L124 PetriNetUnfolderBase]: 119/205 cut-off events. [2023-08-26 16:29:53,579 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES. [2023-08-26 16:29:53,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 205 events. 119/205 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 578 event pairs, 26 based on Foata normal form. 2/207 useless extension candidates. Maximal degree in co-relation 848. Up to 68 conditions per place. [2023-08-26 16:29:53,581 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 41 selfloop transitions, 9 changer transitions 2/52 dead transitions. [2023-08-26 16:29:53,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 448 flow [2023-08-26 16:29:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:29:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:29:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2023-08-26 16:29:53,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403225806451613 [2023-08-26 16:29:53,583 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2023-08-26 16:29:53,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2023-08-26 16:29:53,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:53,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2023-08-26 16:29:53,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 16:29:53,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:53,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:29:53,589 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 242 flow. Second operand 5 states and 546 transitions. [2023-08-26 16:29:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 448 flow [2023-08-26 16:29:53,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 430 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 16:29:53,593 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 284 flow [2023-08-26 16:29:53,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-26 16:29:53,595 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2023-08-26 16:29:53,595 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 284 flow [2023-08-26 16:29:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 16:29:53,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:53,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:53,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 16:29:53,596 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 16:29:53,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash 298623701, now seen corresponding path program 1 times [2023-08-26 16:29:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:53,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029973974] [2023-08-26 16:29:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:53,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:54,005 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 16:29:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029973974] [2023-08-26 16:29:54,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029973974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:29:54,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134728631] [2023-08-26 16:29:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:54,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:29:54,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:29:54,007 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 16:29:54,041 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 16:29:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:54,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 16:29:54,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:29:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:29:54,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:29:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:29:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134728631] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:29:54,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:29:54,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-26 16:29:54,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74168732] [2023-08-26 16:29:54,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:29:54,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 16:29:54,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:54,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 16:29:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-08-26 16:29:54,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:29:54,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 284 flow. Second operand has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 16:29:54,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:54,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:29:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:54,763 INFO L124 PetriNetUnfolderBase]: 252/433 cut-off events. [2023-08-26 16:29:54,764 INFO L125 PetriNetUnfolderBase]: For 1201/1201 co-relation queries the response was YES. [2023-08-26 16:29:54,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 433 events. 252/433 cut-off events. For 1201/1201 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1625 event pairs, 18 based on Foata normal form. 14/447 useless extension candidates. Maximal degree in co-relation 1927. Up to 180 conditions per place. [2023-08-26 16:29:54,767 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 67 selfloop transitions, 21 changer transitions 21/109 dead transitions. [2023-08-26 16:29:54,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 109 transitions, 999 flow [2023-08-26 16:29:54,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 16:29:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 16:29:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 839 transitions. [2023-08-26 16:29:54,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37589605734767023 [2023-08-26 16:29:54,770 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 839 transitions. [2023-08-26 16:29:54,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 839 transitions. [2023-08-26 16:29:54,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:54,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 839 transitions. [2023-08-26 16:29:54,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.22222222222223) internal successors, (839), 9 states have internal predecessors, (839), 0 states have call successors, (0), 0 states 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 16:29:54,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states 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 16:29:54,776 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states 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 16:29:54,776 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 284 flow. Second operand 9 states and 839 transitions. [2023-08-26 16:29:54,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 109 transitions, 999 flow [2023-08-26 16:29:54,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 109 transitions, 968 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-26 16:29:54,782 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 483 flow [2023-08-26 16:29:54,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=483, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-26 16:29:54,783 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2023-08-26 16:29:54,783 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 483 flow [2023-08-26 16:29:54,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 16:29:54,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:54,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:54,791 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 16:29:54,991 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,SelfDestructingSolverStorable10 [2023-08-26 16:29:54,992 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 16:29:54,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:54,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1062984209, now seen corresponding path program 2 times [2023-08-26 16:29:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:54,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402894392] [2023-08-26 16:29:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:55,372 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 16:29:55,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402894392] [2023-08-26 16:29:55,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402894392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:29:55,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898277016] [2023-08-26 16:29:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:29:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:29:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:29:55,374 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 16:29:55,377 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 16:29:55,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:29:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:29:55,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 16:29:55,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:29:55,631 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 16:29:55,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:29:57,769 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 16:29:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898277016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:29:57,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:29:57,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-26 16:29:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639160120] [2023-08-26 16:29:57,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:29:57,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 16:29:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:29:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 16:29:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=133, Unknown=1, NotChecked=0, Total=182 [2023-08-26 16:29:57,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:29:57,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 483 flow. Second operand has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 16:29:57,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:29:57,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:29:57,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:29:59,233 INFO L124 PetriNetUnfolderBase]: 728/1252 cut-off events. [2023-08-26 16:29:59,233 INFO L125 PetriNetUnfolderBase]: For 4283/4283 co-relation queries the response was YES. [2023-08-26 16:29:59,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 1252 events. 728/1252 cut-off events. For 4283/4283 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6154 event pairs, 56 based on Foata normal form. 8/1260 useless extension candidates. Maximal degree in co-relation 5838. Up to 369 conditions per place. [2023-08-26 16:29:59,245 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 161 selfloop transitions, 95 changer transitions 12/268 dead transitions. [2023-08-26 16:29:59,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 268 transitions, 2613 flow [2023-08-26 16:29:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:29:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:29:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1784 transitions. [2023-08-26 16:29:59,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37860780984719866 [2023-08-26 16:29:59,251 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1784 transitions. [2023-08-26 16:29:59,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1784 transitions. [2023-08-26 16:29:59,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:29:59,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1784 transitions. [2023-08-26 16:29:59,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states 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 16:29:59,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 248.0) internal successors, (4960), 20 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states 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 16:29:59,262 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 248.0) internal successors, (4960), 20 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states 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 16:29:59,263 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 483 flow. Second operand 19 states and 1784 transitions. [2023-08-26 16:29:59,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 268 transitions, 2613 flow [2023-08-26 16:29:59,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 268 transitions, 2478 flow, removed 64 selfloop flow, removed 3 redundant places. [2023-08-26 16:29:59,283 INFO L231 Difference]: Finished difference. Result has 86 places, 143 transitions, 1639 flow [2023-08-26 16:29:59,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1639, PETRI_PLACES=86, PETRI_TRANSITIONS=143} [2023-08-26 16:29:59,284 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2023-08-26 16:29:59,284 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 143 transitions, 1639 flow [2023-08-26 16:29:59,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 16:29:59,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:29:59,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:29:59,293 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 16:29:59,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:29:59,491 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 16:29:59,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:29:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1112391621, now seen corresponding path program 3 times [2023-08-26 16:29:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:29:59,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592369591] [2023-08-26 16:29:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:29:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:29:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:29:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:29:59,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:29:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592369591] [2023-08-26 16:29:59,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592369591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:29:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237488820] [2023-08-26 16:29:59,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:29:59,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:29:59,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:29:59,893 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 16:29:59,899 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 16:30:00,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:30:00,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:00,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 16:30:00,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:00,201 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 16:30:00,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:00,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237488820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:00,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:00,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-08-26 16:30:00,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128065069] [2023-08-26 16:30:00,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:00,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 16:30:00,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 16:30:00,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-08-26 16:30:00,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:30:00,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 143 transitions, 1639 flow. Second operand has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 16:30:00,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:00,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:30:00,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:01,382 INFO L124 PetriNetUnfolderBase]: 1568/2707 cut-off events. [2023-08-26 16:30:01,382 INFO L125 PetriNetUnfolderBase]: For 13904/13904 co-relation queries the response was YES. [2023-08-26 16:30:01,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14411 conditions, 2707 events. 1568/2707 cut-off events. For 13904/13904 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15614 event pairs, 170 based on Foata normal form. 7/2714 useless extension candidates. Maximal degree in co-relation 14375. Up to 803 conditions per place. [2023-08-26 16:30:01,410 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 202 selfloop transitions, 164 changer transitions 12/378 dead transitions. [2023-08-26 16:30:01,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 378 transitions, 4789 flow [2023-08-26 16:30:01,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 16:30:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 16:30:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1030 transitions. [2023-08-26 16:30:01,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775659824046921 [2023-08-26 16:30:01,414 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1030 transitions. [2023-08-26 16:30:01,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1030 transitions. [2023-08-26 16:30:01,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:01,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1030 transitions. [2023-08-26 16:30:01,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 93.63636363636364) internal successors, (1030), 11 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 16:30:01,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states 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 16:30:01,421 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states 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 16:30:01,421 INFO L175 Difference]: Start difference. First operand has 86 places, 143 transitions, 1639 flow. Second operand 11 states and 1030 transitions. [2023-08-26 16:30:01,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 378 transitions, 4789 flow [2023-08-26 16:30:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 378 transitions, 4501 flow, removed 141 selfloop flow, removed 2 redundant places. [2023-08-26 16:30:01,487 INFO L231 Difference]: Finished difference. Result has 99 places, 264 transitions, 3561 flow [2023-08-26 16:30:01,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3561, PETRI_PLACES=99, PETRI_TRANSITIONS=264} [2023-08-26 16:30:01,489 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 72 predicate places. [2023-08-26 16:30:01,489 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 264 transitions, 3561 flow [2023-08-26 16:30:01,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.64285714285714) internal successors, (1227), 14 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states 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 16:30:01,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:01,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:01,496 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 16:30:01,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:01,696 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 16:30:01,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash -169630975, now seen corresponding path program 1 times [2023-08-26 16:30:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:01,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731314549] [2023-08-26 16:30:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:01,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731314549] [2023-08-26 16:30:01,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731314549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:01,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705542159] [2023-08-26 16:30:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:01,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:01,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:01,762 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 16:30:01,764 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 16:30:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:01,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:30:01,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:01,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:01,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705542159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:01,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:01,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 16:30:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555212515] [2023-08-26 16:30:01,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:01,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:30:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:30:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:30:01,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:30:01,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 264 transitions, 3561 flow. Second operand has 10 states, 10 states have (on average 104.7) internal successors, (1047), 10 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 16:30:01,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:01,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:30:01,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:02,730 INFO L124 PetriNetUnfolderBase]: 2438/4321 cut-off events. [2023-08-26 16:30:02,730 INFO L125 PetriNetUnfolderBase]: For 30578/30578 co-relation queries the response was YES. [2023-08-26 16:30:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24842 conditions, 4321 events. 2438/4321 cut-off events. For 30578/30578 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 28621 event pairs, 41 based on Foata normal form. 72/4393 useless extension candidates. Maximal degree in co-relation 24800. Up to 1169 conditions per place. [2023-08-26 16:30:02,786 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 426 selfloop transitions, 163 changer transitions 2/591 dead transitions. [2023-08-26 16:30:02,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 591 transitions, 8481 flow [2023-08-26 16:30:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 16:30:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 16:30:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1313 transitions. [2023-08-26 16:30:02,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4411962365591398 [2023-08-26 16:30:02,790 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1313 transitions. [2023-08-26 16:30:02,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1313 transitions. [2023-08-26 16:30:02,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:02,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1313 transitions. [2023-08-26 16:30:02,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.41666666666667) internal successors, (1313), 12 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states 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 16:30:02,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states 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 16:30:02,799 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states 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 16:30:02,799 INFO L175 Difference]: Start difference. First operand has 99 places, 264 transitions, 3561 flow. Second operand 12 states and 1313 transitions. [2023-08-26 16:30:02,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 591 transitions, 8481 flow [2023-08-26 16:30:02,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 591 transitions, 8339 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-08-26 16:30:02,959 INFO L231 Difference]: Finished difference. Result has 112 places, 370 transitions, 5755 flow [2023-08-26 16:30:02,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5755, PETRI_PLACES=112, PETRI_TRANSITIONS=370} [2023-08-26 16:30:02,961 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 85 predicate places. [2023-08-26 16:30:02,961 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 370 transitions, 5755 flow [2023-08-26 16:30:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.7) internal successors, (1047), 10 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states 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 16:30:02,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:02,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:02,966 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 16:30:03,166 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,SelfDestructingSolverStorable13 [2023-08-26 16:30:03,166 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 16:30:03,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:03,167 INFO L85 PathProgramCache]: Analyzing trace with hash -525945127, now seen corresponding path program 2 times [2023-08-26 16:30:03,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:03,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737489505] [2023-08-26 16:30:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:03,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:03,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737489505] [2023-08-26 16:30:03,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737489505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442619327] [2023-08-26 16:30:03,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:30:03,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:03,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:03,509 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 16:30:03,536 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 16:30:03,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:30:03,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:03,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 16:30:03,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:03,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442619327] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:06,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-26 16:30:06,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210114483] [2023-08-26 16:30:06,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:06,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 16:30:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 16:30:06,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-08-26 16:30:06,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:30:06,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 370 transitions, 5755 flow. Second operand has 17 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:30:06,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:06,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:30:06,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:10,071 INFO L124 PetriNetUnfolderBase]: 3536/6279 cut-off events. [2023-08-26 16:30:10,071 INFO L125 PetriNetUnfolderBase]: For 64772/64772 co-relation queries the response was YES. [2023-08-26 16:30:10,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40948 conditions, 6279 events. 3536/6279 cut-off events. For 64772/64772 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 42588 event pairs, 368 based on Foata normal form. 25/6304 useless extension candidates. Maximal degree in co-relation 40899. Up to 4078 conditions per place. [2023-08-26 16:30:10,147 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 498 selfloop transitions, 190 changer transitions 26/714 dead transitions. [2023-08-26 16:30:10,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 714 transitions, 12012 flow [2023-08-26 16:30:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:30:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:30:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1610 transitions. [2023-08-26 16:30:10,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057459677419355 [2023-08-26 16:30:10,152 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1610 transitions. [2023-08-26 16:30:10,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1610 transitions. [2023-08-26 16:30:10,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:10,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1610 transitions. [2023-08-26 16:30:10,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 100.625) internal successors, (1610), 16 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 16:30:10,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states 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 16:30:10,162 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 248.0) internal successors, (4216), 17 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states 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 16:30:10,162 INFO L175 Difference]: Start difference. First operand has 112 places, 370 transitions, 5755 flow. Second operand 16 states and 1610 transitions. [2023-08-26 16:30:10,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 714 transitions, 12012 flow [2023-08-26 16:30:10,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 714 transitions, 11363 flow, removed 316 selfloop flow, removed 2 redundant places. [2023-08-26 16:30:10,452 INFO L231 Difference]: Finished difference. Result has 133 places, 515 transitions, 8531 flow [2023-08-26 16:30:10,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8531, PETRI_PLACES=133, PETRI_TRANSITIONS=515} [2023-08-26 16:30:10,453 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 106 predicate places. [2023-08-26 16:30:10,453 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 515 transitions, 8531 flow [2023-08-26 16:30:10,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:30:10,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:10,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:10,462 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 16:30:10,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 16:30:10,659 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 16:30:10,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1930546461, now seen corresponding path program 3 times [2023-08-26 16:30:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:10,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669114705] [2023-08-26 16:30:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:10,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:10,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669114705] [2023-08-26 16:30:10,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669114705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:10,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850888765] [2023-08-26 16:30:10,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:30:10,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:10,726 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 16:30:10,750 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 16:30:10,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 16:30:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:10,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:30:10,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:10,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:10,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850888765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:10,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:10,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 16:30:10,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560637925] [2023-08-26 16:30:10,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:10,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 16:30:10,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 16:30:10,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 16:30:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:30:10,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 515 transitions, 8531 flow. Second operand has 9 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 16:30:10,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:10,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:30:10,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:12,515 INFO L124 PetriNetUnfolderBase]: 3952/7349 cut-off events. [2023-08-26 16:30:12,516 INFO L125 PetriNetUnfolderBase]: For 81171/81171 co-relation queries the response was YES. [2023-08-26 16:30:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49481 conditions, 7349 events. 3952/7349 cut-off events. For 81171/81171 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 54404 event pairs, 382 based on Foata normal form. 32/7381 useless extension candidates. Maximal degree in co-relation 49424. Up to 2921 conditions per place. [2023-08-26 16:30:12,571 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 471 selfloop transitions, 405 changer transitions 6/882 dead transitions. [2023-08-26 16:30:12,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 882 transitions, 15960 flow [2023-08-26 16:30:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:30:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:30:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1521 transitions. [2023-08-26 16:30:12,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43807603686635943 [2023-08-26 16:30:12,575 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1521 transitions. [2023-08-26 16:30:12,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1521 transitions. [2023-08-26 16:30:12,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:12,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1521 transitions. [2023-08-26 16:30:12,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 108.64285714285714) internal successors, (1521), 14 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states 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 16:30:12,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states 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 16:30:12,583 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states 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 16:30:12,583 INFO L175 Difference]: Start difference. First operand has 133 places, 515 transitions, 8531 flow. Second operand 14 states and 1521 transitions. [2023-08-26 16:30:12,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 882 transitions, 15960 flow [2023-08-26 16:30:13,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 882 transitions, 15313 flow, removed 317 selfloop flow, removed 6 redundant places. [2023-08-26 16:30:13,046 INFO L231 Difference]: Finished difference. Result has 144 places, 655 transitions, 11963 flow [2023-08-26 16:30:13,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=8172, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11963, PETRI_PLACES=144, PETRI_TRANSITIONS=655} [2023-08-26 16:30:13,047 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 117 predicate places. [2023-08-26 16:30:13,047 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 655 transitions, 11963 flow [2023-08-26 16:30:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.11111111111111) internal successors, (946), 9 states have internal predecessors, (946), 0 states have call successors, (0), 0 states 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 16:30:13,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:13,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:13,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 16:30:13,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:13,249 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 16:30:13,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -276168687, now seen corresponding path program 4 times [2023-08-26 16:30:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:13,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005399065] [2023-08-26 16:30:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:13,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005399065] [2023-08-26 16:30:13,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005399065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350677202] [2023-08-26 16:30:13,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:30:13,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:13,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:13,657 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 16:30:13,658 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 16:30:13,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:30:13,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:13,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 16:30:13,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:14,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350677202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:14,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:14,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-26 16:30:14,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999244748] [2023-08-26 16:30:14,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:30:14,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:30:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:30:14,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:30:14,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 655 transitions, 11963 flow. Second operand has 19 states, 19 states have (on average 94.26315789473684) internal successors, (1791), 19 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states 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 16:30:14,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:14,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:30:14,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:21,301 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 [] [2023-08-26 16:30:24,317 INFO L124 PetriNetUnfolderBase]: 5213/9731 cut-off events. [2023-08-26 16:30:24,317 INFO L125 PetriNetUnfolderBase]: For 130833/130833 co-relation queries the response was YES. [2023-08-26 16:30:24,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70357 conditions, 9731 events. 5213/9731 cut-off events. For 130833/130833 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 75980 event pairs, 472 based on Foata normal form. 33/9764 useless extension candidates. Maximal degree in co-relation 70297. Up to 4340 conditions per place. [2023-08-26 16:30:24,405 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 456 selfloop transitions, 704 changer transitions 21/1181 dead transitions. [2023-08-26 16:30:24,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 1181 transitions, 22969 flow [2023-08-26 16:30:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-26 16:30:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-26 16:30:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3082 transitions. [2023-08-26 16:30:24,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40088449531737774 [2023-08-26 16:30:24,412 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3082 transitions. [2023-08-26 16:30:24,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3082 transitions. [2023-08-26 16:30:24,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:24,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3082 transitions. [2023-08-26 16:30:24,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 99.41935483870968) internal successors, (3082), 31 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states 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 16:30:24,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 248.0) internal successors, (7936), 32 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states 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 16:30:24,429 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 248.0) internal successors, (7936), 32 states have internal predecessors, (7936), 0 states have call successors, (0), 0 states 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 16:30:24,429 INFO L175 Difference]: Start difference. First operand has 144 places, 655 transitions, 11963 flow. Second operand 31 states and 3082 transitions. [2023-08-26 16:30:24,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 1181 transitions, 22969 flow [2023-08-26 16:30:25,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 1181 transitions, 22354 flow, removed 280 selfloop flow, removed 6 redundant places. [2023-08-26 16:30:25,347 INFO L231 Difference]: Finished difference. Result has 178 places, 1004 transitions, 21528 flow [2023-08-26 16:30:25,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=11378, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21528, PETRI_PLACES=178, PETRI_TRANSITIONS=1004} [2023-08-26 16:30:25,348 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 151 predicate places. [2023-08-26 16:30:25,348 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 1004 transitions, 21528 flow [2023-08-26 16:30:25,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 94.26315789473684) internal successors, (1791), 19 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states 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 16:30:25,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:25,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:25,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 16:30:25,554 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,SelfDestructingSolverStorable16 [2023-08-26 16:30:25,554 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 16:30:25,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:25,554 INFO L85 PathProgramCache]: Analyzing trace with hash -622664071, now seen corresponding path program 5 times [2023-08-26 16:30:25,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:25,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460249091] [2023-08-26 16:30:25,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:25,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460249091] [2023-08-26 16:30:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460249091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190750960] [2023-08-26 16:30:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:30:25,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:25,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:25,945 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 16:30:25,951 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 16:30:26,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 16:30:26,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:26,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 16:30:26,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:26,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:26,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:26,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190750960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:26,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:26,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-26 16:30:26,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469559060] [2023-08-26 16:30:26,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:26,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 16:30:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:26,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 16:30:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-26 16:30:26,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:30:26,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 1004 transitions, 21528 flow. Second operand has 20 states, 20 states have (on average 87.15) internal successors, (1743), 20 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states 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 16:30:26,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:26,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:30:26,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:32,705 INFO L124 PetriNetUnfolderBase]: 6062/11121 cut-off events. [2023-08-26 16:30:32,705 INFO L125 PetriNetUnfolderBase]: For 179641/179641 co-relation queries the response was YES. [2023-08-26 16:30:32,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87548 conditions, 11121 events. 6062/11121 cut-off events. For 179641/179641 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 87470 event pairs, 528 based on Foata normal form. 14/11135 useless extension candidates. Maximal degree in co-relation 87481. Up to 4013 conditions per place. [2023-08-26 16:30:32,784 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 397 selfloop transitions, 954 changer transitions 14/1365 dead transitions. [2023-08-26 16:30:32,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1365 transitions, 30812 flow [2023-08-26 16:30:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:30:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:30:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2199 transitions. [2023-08-26 16:30:32,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694556451612903 [2023-08-26 16:30:32,788 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2199 transitions. [2023-08-26 16:30:32,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2199 transitions. [2023-08-26 16:30:32,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:32,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2199 transitions. [2023-08-26 16:30:32,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 91.625) internal successors, (2199), 24 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states 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 16:30:32,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states 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 16:30:32,798 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 248.0) internal successors, (6200), 25 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states 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 16:30:32,798 INFO L175 Difference]: Start difference. First operand has 178 places, 1004 transitions, 21528 flow. Second operand 24 states and 2199 transitions. [2023-08-26 16:30:32,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1365 transitions, 30812 flow [2023-08-26 16:30:34,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1365 transitions, 29420 flow, removed 679 selfloop flow, removed 9 redundant places. [2023-08-26 16:30:34,147 INFO L231 Difference]: Finished difference. Result has 201 places, 1233 transitions, 28514 flow [2023-08-26 16:30:34,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=20296, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=743, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28514, PETRI_PLACES=201, PETRI_TRANSITIONS=1233} [2023-08-26 16:30:34,148 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 174 predicate places. [2023-08-26 16:30:34,148 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 1233 transitions, 28514 flow [2023-08-26 16:30:34,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 87.15) internal successors, (1743), 20 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states 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 16:30:34,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:34,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:34,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 16:30:34,352 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,SelfDestructingSolverStorable17 [2023-08-26 16:30:34,352 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 16:30:34,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash -61551611, now seen corresponding path program 6 times [2023-08-26 16:30:34,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:34,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470574529] [2023-08-26 16:30:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470574529] [2023-08-26 16:30:34,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470574529] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:34,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154293619] [2023-08-26 16:30:34,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:30:34,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:34,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:34,421 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 16:30:34,440 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 16:30:34,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 16:30:34,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:34,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:30:34,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:34,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:34,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154293619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:34,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:34,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 16:30:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252087761] [2023-08-26 16:30:34,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:30:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:30:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:30:34,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:30:34,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 1233 transitions, 28514 flow. Second operand has 10 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 16:30:34,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:34,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:30:34,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:39,118 INFO L124 PetriNetUnfolderBase]: 7180/13001 cut-off events. [2023-08-26 16:30:39,119 INFO L125 PetriNetUnfolderBase]: For 233648/233648 co-relation queries the response was YES. [2023-08-26 16:30:39,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109230 conditions, 13001 events. 7180/13001 cut-off events. For 233648/233648 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 103749 event pairs, 588 based on Foata normal form. 176/13177 useless extension candidates. Maximal degree in co-relation 109153. Up to 5309 conditions per place. [2023-08-26 16:30:39,222 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 904 selfloop transitions, 945 changer transitions 0/1849 dead transitions. [2023-08-26 16:30:39,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 1849 transitions, 44319 flow [2023-08-26 16:30:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:30:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:30:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1524 transitions. [2023-08-26 16:30:39,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43894009216589863 [2023-08-26 16:30:39,225 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1524 transitions. [2023-08-26 16:30:39,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1524 transitions. [2023-08-26 16:30:39,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:39,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1524 transitions. [2023-08-26 16:30:39,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 108.85714285714286) internal successors, (1524), 14 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states 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 16:30:39,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states 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 16:30:39,231 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 248.0) internal successors, (3720), 15 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states 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 16:30:39,231 INFO L175 Difference]: Start difference. First operand has 201 places, 1233 transitions, 28514 flow. Second operand 14 states and 1524 transitions. [2023-08-26 16:30:39,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 1849 transitions, 44319 flow [2023-08-26 16:30:41,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 1849 transitions, 42552 flow, removed 868 selfloop flow, removed 8 redundant places. [2023-08-26 16:30:41,416 INFO L231 Difference]: Finished difference. Result has 214 places, 1503 transitions, 37718 flow [2023-08-26 16:30:41,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=27295, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=37718, PETRI_PLACES=214, PETRI_TRANSITIONS=1503} [2023-08-26 16:30:41,417 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 187 predicate places. [2023-08-26 16:30:41,417 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 1503 transitions, 37718 flow [2023-08-26 16:30:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.8) internal successors, (1048), 10 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 16:30:41,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:41,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:41,422 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 16:30:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:41,618 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 16:30:41,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 817688773, now seen corresponding path program 7 times [2023-08-26 16:30:41,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:41,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30936757] [2023-08-26 16:30:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:41,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:41,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30936757] [2023-08-26 16:30:41,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30936757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:41,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598151544] [2023-08-26 16:30:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:30:41,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:41,683 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 16:30:41,689 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 16:30:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:41,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:30:41,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:41,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:41,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598151544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:41,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:41,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 16:30:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029995536] [2023-08-26 16:30:41,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:41,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 16:30:41,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 16:30:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 16:30:41,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:30:41,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 1503 transitions, 37718 flow. Second operand has 9 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 16:30:41,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:41,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:30:41,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:30:47,709 INFO L124 PetriNetUnfolderBase]: 7598/13717 cut-off events. [2023-08-26 16:30:47,709 INFO L125 PetriNetUnfolderBase]: For 311132/311132 co-relation queries the response was YES. [2023-08-26 16:30:47,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124943 conditions, 13717 events. 7598/13717 cut-off events. For 311132/311132 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 110882 event pairs, 76 based on Foata normal form. 108/13825 useless extension candidates. Maximal degree in co-relation 124859. Up to 3951 conditions per place. [2023-08-26 16:30:47,843 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1391 selfloop transitions, 718 changer transitions 0/2109 dead transitions. [2023-08-26 16:30:47,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 2109 transitions, 51439 flow [2023-08-26 16:30:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 16:30:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 16:30:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1626 transitions. [2023-08-26 16:30:47,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43709677419354837 [2023-08-26 16:30:47,846 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1626 transitions. [2023-08-26 16:30:47,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1626 transitions. [2023-08-26 16:30:47,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:30:47,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1626 transitions. [2023-08-26 16:30:47,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 108.4) internal successors, (1626), 15 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states 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 16:30:47,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states 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 16:30:47,853 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states 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 16:30:47,853 INFO L175 Difference]: Start difference. First operand has 214 places, 1503 transitions, 37718 flow. Second operand 15 states and 1626 transitions. [2023-08-26 16:30:47,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 2109 transitions, 51439 flow [2023-08-26 16:30:50,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 2109 transitions, 51074 flow, removed 175 selfloop flow, removed 2 redundant places. [2023-08-26 16:30:50,817 INFO L231 Difference]: Finished difference. Result has 230 places, 1606 transitions, 42490 flow [2023-08-26 16:30:50,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=36813, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=42490, PETRI_PLACES=230, PETRI_TRANSITIONS=1606} [2023-08-26 16:30:50,819 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 203 predicate places. [2023-08-26 16:30:50,819 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 1606 transitions, 42490 flow [2023-08-26 16:30:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.22222222222223) internal successors, (947), 9 states have internal predecessors, (947), 0 states have call successors, (0), 0 states 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 16:30:50,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:30:50,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:30:50,824 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 16:30:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:51,020 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 16:30:51,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:30:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1716714601, now seen corresponding path program 8 times [2023-08-26 16:30:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:30:51,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934793082] [2023-08-26 16:30:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:30:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:30:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:30:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:51,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:30:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934793082] [2023-08-26 16:30:51,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934793082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:30:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260542005] [2023-08-26 16:30:51,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:30:51,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:30:51,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:30:51,353 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 16:30:51,376 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 16:30:51,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:30:51,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:30:51,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 16:30:51,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:30:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:30:51,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:30:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:30:52,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260542005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:30:52,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:30:52,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-26 16:30:52,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331895053] [2023-08-26 16:30:52,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:30:52,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:30:52,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:30:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:30:52,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:30:52,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:30:52,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 1606 transitions, 42490 flow. Second operand has 18 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states 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 16:30:52,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:30:52,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:30:52,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:31:04,259 INFO L124 PetriNetUnfolderBase]: 8758/15756 cut-off events. [2023-08-26 16:31:04,260 INFO L125 PetriNetUnfolderBase]: For 410771/410771 co-relation queries the response was YES. [2023-08-26 16:31:04,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152194 conditions, 15756 events. 8758/15756 cut-off events. For 410771/410771 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 129529 event pairs, 732 based on Foata normal form. 20/15776 useless extension candidates. Maximal degree in co-relation 152106. Up to 7516 conditions per place. [2023-08-26 16:31:04,411 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 674 selfloop transitions, 1400 changer transitions 24/2098 dead transitions. [2023-08-26 16:31:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 2098 transitions, 58798 flow [2023-08-26 16:31:04,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 16:31:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 16:31:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2470 transitions. [2023-08-26 16:31:04,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39838709677419354 [2023-08-26 16:31:04,414 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2470 transitions. [2023-08-26 16:31:04,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2470 transitions. [2023-08-26 16:31:04,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:31:04,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2470 transitions. [2023-08-26 16:31:04,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 98.8) internal successors, (2470), 25 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states 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 16:31:04,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states 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 16:31:04,421 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states 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 16:31:04,421 INFO L175 Difference]: Start difference. First operand has 230 places, 1606 transitions, 42490 flow. Second operand 25 states and 2470 transitions. [2023-08-26 16:31:04,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 2098 transitions, 58798 flow [2023-08-26 16:31:09,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 2098 transitions, 57864 flow, removed 149 selfloop flow, removed 4 redundant places. [2023-08-26 16:31:09,195 INFO L231 Difference]: Finished difference. Result has 261 places, 1954 transitions, 57564 flow [2023-08-26 16:31:09,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=41906, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=57564, PETRI_PLACES=261, PETRI_TRANSITIONS=1954} [2023-08-26 16:31:09,197 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 234 predicate places. [2023-08-26 16:31:09,197 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 1954 transitions, 57564 flow [2023-08-26 16:31:09,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states 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 16:31:09,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:31:09,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:31:09,202 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 16:31:09,399 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,SelfDestructingSolverStorable20 [2023-08-26 16:31:09,400 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 16:31:09,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:31:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2034206945, now seen corresponding path program 9 times [2023-08-26 16:31:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:31:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758719805] [2023-08-26 16:31:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:31:09,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:31:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:31:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:31:09,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:31:09,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758719805] [2023-08-26 16:31:09,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758719805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:31:09,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735543130] [2023-08-26 16:31:09,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:31:09,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:31:09,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:31:09,785 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 16:31:09,787 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 16:31:09,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:31:09,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:31:09,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 16:31:09,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:31:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:31:10,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:31:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:31:10,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735543130] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:31:10,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:31:10,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-26 16:31:10,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867542590] [2023-08-26 16:31:10,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:31:10,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:31:10,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:31:10,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:31:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:31:10,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:31:10,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 1954 transitions, 57564 flow. Second operand has 18 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states 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 16:31:10,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:31:10,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:31:10,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:31:21,684 INFO L124 PetriNetUnfolderBase]: 10318/18573 cut-off events. [2023-08-26 16:31:21,684 INFO L125 PetriNetUnfolderBase]: For 554242/554242 co-relation queries the response was YES. [2023-08-26 16:31:21,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192179 conditions, 18573 events. 10318/18573 cut-off events. For 554242/554242 co-relation queries the response was YES. Maximal size of possible extension queue 1251. Compared 157411 event pairs, 969 based on Foata normal form. 20/18593 useless extension candidates. Maximal degree in co-relation 192082. Up to 8905 conditions per place. [2023-08-26 16:31:21,857 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 766 selfloop transitions, 1771 changer transitions 31/2568 dead transitions. [2023-08-26 16:31:21,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 2568 transitions, 80312 flow [2023-08-26 16:31:21,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-26 16:31:21,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-26 16:31:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2857 transitions. [2023-08-26 16:31:21,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972469410456062 [2023-08-26 16:31:21,861 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2857 transitions. [2023-08-26 16:31:21,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2857 transitions. [2023-08-26 16:31:21,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:31:21,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2857 transitions. [2023-08-26 16:31:21,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 98.51724137931035) internal successors, (2857), 29 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states 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 16:31:21,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 248.0) internal successors, (7440), 30 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states 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 16:31:21,870 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 248.0) internal successors, (7440), 30 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states 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 16:31:21,870 INFO L175 Difference]: Start difference. First operand has 261 places, 1954 transitions, 57564 flow. Second operand 29 states and 2857 transitions. [2023-08-26 16:31:21,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 2568 transitions, 80312 flow [2023-08-26 16:31:29,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 2568 transitions, 77409 flow, removed 1360 selfloop flow, removed 4 redundant places. [2023-08-26 16:31:29,283 INFO L231 Difference]: Finished difference. Result has 297 places, 2412 transitions, 74806 flow [2023-08-26 16:31:29,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=55595, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=74806, PETRI_PLACES=297, PETRI_TRANSITIONS=2412} [2023-08-26 16:31:29,285 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 270 predicate places. [2023-08-26 16:31:29,285 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 2412 transitions, 74806 flow [2023-08-26 16:31:29,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 94.38888888888889) internal successors, (1699), 18 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states 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 16:31:29,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:31:29,286 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:31:29,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-26 16:31:29,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 16:31:29,490 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 16:31:29,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:31:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash 633219860, now seen corresponding path program 10 times [2023-08-26 16:31:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:31:29,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917039965] [2023-08-26 16:31:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:31:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:31:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:31:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:31:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:31:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917039965] [2023-08-26 16:31:29,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917039965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:31:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738133408] [2023-08-26 16:31:29,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:31:29,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:31:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:31:29,543 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 16:31:29,545 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 16:31:29,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:31:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:31:29,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 16:31:29,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:31:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:31:29,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:31:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 16:31:29,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738133408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:31:29,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:31:29,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 16:31:29,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989806383] [2023-08-26 16:31:29,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:31:29,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 16:31:29,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:31:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 16:31:29,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-26 16:31:29,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-26 16:31:29,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 2412 transitions, 74806 flow. Second operand has 8 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states 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 16:31:29,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:31:29,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-26 16:31:29,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:31:38,432 INFO L124 PetriNetUnfolderBase]: 7454/13382 cut-off events. [2023-08-26 16:31:38,432 INFO L125 PetriNetUnfolderBase]: For 465795/465795 co-relation queries the response was YES. [2023-08-26 16:31:38,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136909 conditions, 13382 events. 7454/13382 cut-off events. For 465795/465795 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 109605 event pairs, 524 based on Foata normal form. 810/14192 useless extension candidates. Maximal degree in co-relation 136800. Up to 8426 conditions per place. [2023-08-26 16:31:38,618 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 1447 selfloop transitions, 448 changer transitions 2/1897 dead transitions. [2023-08-26 16:31:38,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 1897 transitions, 60947 flow [2023-08-26 16:31:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 16:31:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 16:31:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 571 transitions. [2023-08-26 16:31:38,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048387096774196 [2023-08-26 16:31:38,620 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 571 transitions. [2023-08-26 16:31:38,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 571 transitions. [2023-08-26 16:31:38,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:31:38,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 571 transitions. [2023-08-26 16:31:38,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 16:31:38,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:31:38,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:31:38,623 INFO L175 Difference]: Start difference. First operand has 297 places, 2412 transitions, 74806 flow. Second operand 5 states and 571 transitions. [2023-08-26 16:31:38,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 1897 transitions, 60947 flow [2023-08-26 16:31:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1897 transitions, 55735 flow, removed 1683 selfloop flow, removed 12 redundant places. [2023-08-26 16:31:43,252 INFO L231 Difference]: Finished difference. Result has 286 places, 1722 transitions, 49657 flow [2023-08-26 16:31:43,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=44553, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=49657, PETRI_PLACES=286, PETRI_TRANSITIONS=1722} [2023-08-26 16:31:43,253 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 259 predicate places. [2023-08-26 16:31:43,253 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 1722 transitions, 49657 flow [2023-08-26 16:31:43,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states 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 16:31:43,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:31:43,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:31:43,258 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 16:31:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:31:43,454 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 16:31:43,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:31:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash 434216482, now seen corresponding path program 11 times [2023-08-26 16:31:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:31:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621966321] [2023-08-26 16:31:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:31:43,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:31:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:31:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:31:43,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:31:43,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621966321] [2023-08-26 16:31:43,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621966321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:31:43,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568769834] [2023-08-26 16:31:43,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:31:43,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:31:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:31:43,517 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 16:31:43,546 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 16:31:43,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 16:31:43,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:31:43,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:31:43,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:31:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:31:43,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:31:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:31:43,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568769834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:31:43,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:31:43,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 16:31:43,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812322307] [2023-08-26 16:31:43,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:31:43,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:31:43,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:31:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:31:43,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:31:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:31:43,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 1722 transitions, 49657 flow. Second operand has 10 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 16:31:43,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:31:43,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:31:43,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:31:50,327 INFO L124 PetriNetUnfolderBase]: 7669/13777 cut-off events. [2023-08-26 16:31:50,327 INFO L125 PetriNetUnfolderBase]: For 409726/409726 co-relation queries the response was YES. [2023-08-26 16:31:50,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138050 conditions, 13777 events. 7669/13777 cut-off events. For 409726/409726 co-relation queries the response was YES. Maximal size of possible extension queue 1015. Compared 113041 event pairs, 798 based on Foata normal form. 224/14001 useless extension candidates. Maximal degree in co-relation 137944. Up to 12663 conditions per place. [2023-08-26 16:31:50,461 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1721 selfloop transitions, 172 changer transitions 0/1893 dead transitions. [2023-08-26 16:31:50,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1893 transitions, 57046 flow [2023-08-26 16:31:50,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 16:31:50,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 16:31:50,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1428 transitions. [2023-08-26 16:31:50,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44292803970223327 [2023-08-26 16:31:50,463 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1428 transitions. [2023-08-26 16:31:50,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1428 transitions. [2023-08-26 16:31:50,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:31:50,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1428 transitions. [2023-08-26 16:31:50,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 109.84615384615384) internal successors, (1428), 13 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 16:31:50,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states 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 16:31:50,468 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 248.0) internal successors, (3472), 14 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states 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 16:31:50,468 INFO L175 Difference]: Start difference. First operand has 286 places, 1722 transitions, 49657 flow. Second operand 13 states and 1428 transitions. [2023-08-26 16:31:50,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1893 transitions, 57046 flow [2023-08-26 16:31:53,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1893 transitions, 56846 flow, removed 100 selfloop flow, removed 0 redundant places. [2023-08-26 16:31:54,034 INFO L231 Difference]: Finished difference. Result has 305 places, 1784 transitions, 51949 flow [2023-08-26 16:31:54,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=48931, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=51949, PETRI_PLACES=305, PETRI_TRANSITIONS=1784} [2023-08-26 16:31:54,036 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 278 predicate places. [2023-08-26 16:31:54,036 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1784 transitions, 51949 flow [2023-08-26 16:31:54,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.4) internal successors, (1054), 10 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 16:31:54,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:31:54,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:31:54,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 16:31:54,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:31:54,237 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 16:31:54,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:31:54,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1164004510, now seen corresponding path program 12 times [2023-08-26 16:31:54,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:31:54,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854201431] [2023-08-26 16:31:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:31:54,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:31:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:31:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:31:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:31:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854201431] [2023-08-26 16:31:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854201431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:31:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598835277] [2023-08-26 16:31:54,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:31:54,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:31:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:31:54,313 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 16:31:54,337 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 16:31:54,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 16:31:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:31:54,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:31:54,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:31:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:31:54,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:31:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 16:31:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598835277] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:31:54,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:31:54,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-08-26 16:31:54,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916433154] [2023-08-26 16:31:54,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:31:54,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 16:31:54,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:31:54,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 16:31:54,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 16:31:54,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:31:54,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1784 transitions, 51949 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 16:31:54,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:31:54,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:31:54,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:32:01,817 INFO L124 PetriNetUnfolderBase]: 7640/13681 cut-off events. [2023-08-26 16:32:01,817 INFO L125 PetriNetUnfolderBase]: For 460220/460220 co-relation queries the response was YES. [2023-08-26 16:32:01,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143499 conditions, 13681 events. 7640/13681 cut-off events. For 460220/460220 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 112013 event pairs, 364 based on Foata normal form. 18/13699 useless extension candidates. Maximal degree in co-relation 143385. Up to 9044 conditions per place. [2023-08-26 16:32:02,029 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1679 selfloop transitions, 215 changer transitions 8/1902 dead transitions. [2023-08-26 16:32:02,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1902 transitions, 57500 flow [2023-08-26 16:32:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 16:32:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 16:32:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1621 transitions. [2023-08-26 16:32:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435752688172043 [2023-08-26 16:32:02,031 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1621 transitions. [2023-08-26 16:32:02,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1621 transitions. [2023-08-26 16:32:02,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:32:02,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1621 transitions. [2023-08-26 16:32:02,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 108.06666666666666) internal successors, (1621), 15 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states 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 16:32:02,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states 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 16:32:02,036 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 248.0) internal successors, (3968), 16 states have internal predecessors, (3968), 0 states have call successors, (0), 0 states 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 16:32:02,036 INFO L175 Difference]: Start difference. First operand has 305 places, 1784 transitions, 51949 flow. Second operand 15 states and 1621 transitions. [2023-08-26 16:32:02,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1902 transitions, 57500 flow [2023-08-26 16:32:06,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1902 transitions, 56525 flow, removed 422 selfloop flow, removed 6 redundant places. [2023-08-26 16:32:06,114 INFO L231 Difference]: Finished difference. Result has 316 places, 1787 transitions, 51326 flow [2023-08-26 16:32:06,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=50196, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=51326, PETRI_PLACES=316, PETRI_TRANSITIONS=1787} [2023-08-26 16:32:06,115 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 289 predicate places. [2023-08-26 16:32:06,115 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 1787 transitions, 51326 flow [2023-08-26 16:32:06,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 16:32:06,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:32:06,116 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:32:06,120 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 16:32:06,316 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,SelfDestructingSolverStorable24 [2023-08-26 16:32:06,316 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 16:32:06,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:32:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash -12508625, now seen corresponding path program 13 times [2023-08-26 16:32:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:32:06,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114947628] [2023-08-26 16:32:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:32:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:32:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:32:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:32:06,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:32:06,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114947628] [2023-08-26 16:32:06,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114947628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:32:06,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903071765] [2023-08-26 16:32:06,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:32:06,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:32:06,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:32:06,706 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 16:32:06,730 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 16:32:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:32:06,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 16:32:06,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:32:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:32:07,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:32:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:32:07,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903071765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:32:07,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:32:07,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-26 16:32:07,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492542417] [2023-08-26 16:32:07,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:32:07,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 16:32:07,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:32:07,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 16:32:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-08-26 16:32:07,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:32:07,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 1787 transitions, 51326 flow. Second operand has 25 states, 25 states have (on average 93.96) internal successors, (2349), 25 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states 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 16:32:07,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:32:07,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:32:07,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:32:26,153 INFO L124 PetriNetUnfolderBase]: 8948/15798 cut-off events. [2023-08-26 16:32:26,153 INFO L125 PetriNetUnfolderBase]: For 552787/552787 co-relation queries the response was YES. [2023-08-26 16:32:26,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169201 conditions, 15798 events. 8948/15798 cut-off events. For 552787/552787 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 128670 event pairs, 678 based on Foata normal form. 11/15809 useless extension candidates. Maximal degree in co-relation 169085. Up to 6516 conditions per place. [2023-08-26 16:32:26,315 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 699 selfloop transitions, 1651 changer transitions 30/2380 dead transitions. [2023-08-26 16:32:26,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 2380 transitions, 70841 flow [2023-08-26 16:32:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-26 16:32:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-26 16:32:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4303 transitions. [2023-08-26 16:32:26,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39433651026392963 [2023-08-26 16:32:26,320 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4303 transitions. [2023-08-26 16:32:26,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4303 transitions. [2023-08-26 16:32:26,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:32:26,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4303 transitions. [2023-08-26 16:32:26,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 97.79545454545455) internal successors, (4303), 44 states have internal predecessors, (4303), 0 states have call successors, (0), 0 states 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 16:32:26,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states 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 16:32:26,333 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 248.0) internal successors, (11160), 45 states have internal predecessors, (11160), 0 states have call successors, (0), 0 states 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 16:32:26,333 INFO L175 Difference]: Start difference. First operand has 316 places, 1787 transitions, 51326 flow. Second operand 44 states and 4303 transitions. [2023-08-26 16:32:26,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 2380 transitions, 70841 flow [2023-08-26 16:32:31,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 2380 transitions, 70094 flow, removed 331 selfloop flow, removed 4 redundant places. [2023-08-26 16:32:31,797 INFO L231 Difference]: Finished difference. Result has 367 places, 2165 transitions, 67245 flow [2023-08-26 16:32:31,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=50862, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=67245, PETRI_PLACES=367, PETRI_TRANSITIONS=2165} [2023-08-26 16:32:31,799 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 340 predicate places. [2023-08-26 16:32:31,799 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 2165 transitions, 67245 flow [2023-08-26 16:32:31,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.96) internal successors, (2349), 25 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states 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 16:32:31,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:32:31,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:32:31,803 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 16:32:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 16:32:32,000 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 16:32:32,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:32:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash -565756084, now seen corresponding path program 14 times [2023-08-26 16:32:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:32:32,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533439670] [2023-08-26 16:32:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:32:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:32:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:32:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:32:32,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:32:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533439670] [2023-08-26 16:32:32,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533439670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:32:32,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760276298] [2023-08-26 16:32:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:32:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:32:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:32:32,064 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 16:32:32,067 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 16:32:32,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:32:32,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:32:32,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:32:32,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:32:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:32:32,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:32:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:32:32,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760276298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:32:32,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:32:32,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 16:32:32,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92740592] [2023-08-26 16:32:32,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:32:32,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 16:32:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:32:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 16:32:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 16:32:32,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:32:32,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 2165 transitions, 67245 flow. Second operand has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states 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 16:32:32,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:32:32,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:32:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:32:42,801 INFO L124 PetriNetUnfolderBase]: 9742/17366 cut-off events. [2023-08-26 16:32:42,801 INFO L125 PetriNetUnfolderBase]: For 678510/678510 co-relation queries the response was YES. [2023-08-26 16:32:42,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190440 conditions, 17366 events. 9742/17366 cut-off events. For 678510/678510 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 145107 event pairs, 320 based on Foata normal form. 330/17696 useless extension candidates. Maximal degree in co-relation 190312. Up to 6056 conditions per place. [2023-08-26 16:32:43,007 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1698 selfloop transitions, 793 changer transitions 127/2618 dead transitions. [2023-08-26 16:32:43,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2618 transitions, 79307 flow [2023-08-26 16:32:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 16:32:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 16:32:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1305 transitions. [2023-08-26 16:32:43,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43850806451612906 [2023-08-26 16:32:43,008 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1305 transitions. [2023-08-26 16:32:43,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1305 transitions. [2023-08-26 16:32:43,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:32:43,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1305 transitions. [2023-08-26 16:32:43,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 108.75) internal successors, (1305), 12 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states 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 16:32:43,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states 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 16:32:43,012 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 248.0) internal successors, (3224), 13 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states 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 16:32:43,012 INFO L175 Difference]: Start difference. First operand has 367 places, 2165 transitions, 67245 flow. Second operand 12 states and 1305 transitions. [2023-08-26 16:32:43,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2618 transitions, 79307 flow [2023-08-26 16:32:50,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2618 transitions, 75644 flow, removed 1766 selfloop flow, removed 16 redundant places. [2023-08-26 16:32:50,137 INFO L231 Difference]: Finished difference. Result has 368 places, 2056 transitions, 61670 flow [2023-08-26 16:32:50,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=56999, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=61670, PETRI_PLACES=368, PETRI_TRANSITIONS=2056} [2023-08-26 16:32:50,139 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 341 predicate places. [2023-08-26 16:32:50,139 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 2056 transitions, 61670 flow [2023-08-26 16:32:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states 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 16:32:50,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:32:50,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:32:50,144 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 16:32:50,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 16:32:50,340 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 16:32:50,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:32:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1673813480, now seen corresponding path program 15 times [2023-08-26 16:32:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:32:50,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138244842] [2023-08-26 16:32:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:32:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:32:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:32:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:32:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:32:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138244842] [2023-08-26 16:32:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138244842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:32:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352005766] [2023-08-26 16:32:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:32:50,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:32:50,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:32:50,386 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 16:32:50,389 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 16:32:50,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-26 16:32:50,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:32:50,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-26 16:32:50,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:32:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:32:50,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:32:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:32:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352005766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:32:50,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:32:50,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-08-26 16:32:50,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422550897] [2023-08-26 16:32:50,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:32:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 16:32:50,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:32:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 16:32:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 16:32:50,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:32:50,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 2056 transitions, 61670 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 16:32:50,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:32:50,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:32:50,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:33:00,036 INFO L124 PetriNetUnfolderBase]: 8988/15915 cut-off events. [2023-08-26 16:33:00,036 INFO L125 PetriNetUnfolderBase]: For 691438/691438 co-relation queries the response was YES. [2023-08-26 16:33:00,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179387 conditions, 15915 events. 8988/15915 cut-off events. For 691438/691438 co-relation queries the response was YES. Maximal size of possible extension queue 1070. Compared 129124 event pairs, 610 based on Foata normal form. 598/16513 useless extension candidates. Maximal degree in co-relation 179257. Up to 8376 conditions per place. [2023-08-26 16:33:00,229 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 1414 selfloop transitions, 927 changer transitions 0/2341 dead transitions. [2023-08-26 16:33:00,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2341 transitions, 72806 flow [2023-08-26 16:33:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 16:33:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 16:33:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1206 transitions. [2023-08-26 16:33:00,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44208211143695014 [2023-08-26 16:33:00,231 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1206 transitions. [2023-08-26 16:33:00,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1206 transitions. [2023-08-26 16:33:00,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:33:00,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1206 transitions. [2023-08-26 16:33:00,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 109.63636363636364) internal successors, (1206), 11 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:33:00,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states 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 16:33:00,235 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states 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 16:33:00,235 INFO L175 Difference]: Start difference. First operand has 368 places, 2056 transitions, 61670 flow. Second operand 11 states and 1206 transitions. [2023-08-26 16:33:00,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2341 transitions, 72806 flow [2023-08-26 16:33:07,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 2341 transitions, 70658 flow, removed 930 selfloop flow, removed 5 redundant places. [2023-08-26 16:33:07,515 INFO L231 Difference]: Finished difference. Result has 377 places, 2112 transitions, 64820 flow [2023-08-26 16:33:07,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=58834, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=846, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=64820, PETRI_PLACES=377, PETRI_TRANSITIONS=2112} [2023-08-26 16:33:07,517 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 350 predicate places. [2023-08-26 16:33:07,517 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 2112 transitions, 64820 flow [2023-08-26 16:33:07,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 16:33:07,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:33:07,517 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:33:07,522 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 16:33:07,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:33:07,722 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 16:33:07,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:33:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1114776146, now seen corresponding path program 16 times [2023-08-26 16:33:07,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:33:07,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572382564] [2023-08-26 16:33:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:33:07,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:33:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:33:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:33:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:33:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572382564] [2023-08-26 16:33:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572382564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:33:07,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:33:07,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 16:33:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647976436] [2023-08-26 16:33:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:33:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:33:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:33:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:33:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:33:07,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 248 [2023-08-26 16:33:07,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 2112 transitions, 64820 flow. Second operand has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 16:33:07,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:33:07,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 248 [2023-08-26 16:33:07,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:33:15,034 INFO L124 PetriNetUnfolderBase]: 6514/11844 cut-off events. [2023-08-26 16:33:15,034 INFO L125 PetriNetUnfolderBase]: For 456287/456287 co-relation queries the response was YES. [2023-08-26 16:33:15,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133559 conditions, 11844 events. 6514/11844 cut-off events. For 456287/456287 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 94521 event pairs, 1638 based on Foata normal form. 434/12278 useless extension candidates. Maximal degree in co-relation 133426. Up to 7115 conditions per place. [2023-08-26 16:33:15,158 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 1312 selfloop transitions, 300 changer transitions 257/1869 dead transitions. [2023-08-26 16:33:15,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1869 transitions, 61266 flow [2023-08-26 16:33:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 16:33:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 16:33:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 457 transitions. [2023-08-26 16:33:15,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46068548387096775 [2023-08-26 16:33:15,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 457 transitions. [2023-08-26 16:33:15,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 457 transitions. [2023-08-26 16:33:15,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:33:15,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 457 transitions. [2023-08-26 16:33:15,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 16:33:15,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 16:33:15,161 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 16:33:15,161 INFO L175 Difference]: Start difference. First operand has 377 places, 2112 transitions, 64820 flow. Second operand 4 states and 457 transitions. [2023-08-26 16:33:15,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1869 transitions, 61266 flow [2023-08-26 16:33:19,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1869 transitions, 60357 flow, removed 307 selfloop flow, removed 14 redundant places. [2023-08-26 16:33:19,501 INFO L231 Difference]: Finished difference. Result has 365 places, 1512 transitions, 45788 flow [2023-08-26 16:33:19,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=51929, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=45788, PETRI_PLACES=365, PETRI_TRANSITIONS=1512} [2023-08-26 16:33:19,503 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 338 predicate places. [2023-08-26 16:33:19,503 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1512 transitions, 45788 flow [2023-08-26 16:33:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states 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 16:33:19,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:33:19,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:33:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 16:33:19,504 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 16:33:19,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:33:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1834731674, now seen corresponding path program 4 times [2023-08-26 16:33:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:33:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350195571] [2023-08-26 16:33:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:33:19,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:33:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:33:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:33:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:33:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350195571] [2023-08-26 16:33:19,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350195571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:33:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543978754] [2023-08-26 16:33:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:33:19,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:33:19,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:33:19,561 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 16:33:19,563 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 16:33:19,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:33:19,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:33:19,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 16:33:19,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:33:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:33:19,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:33:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:33:19,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543978754] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:33:19,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:33:19,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5] total 11 [2023-08-26 16:33:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285758229] [2023-08-26 16:33:19,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:33:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 16:33:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:33:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 16:33:19,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:33:19,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:33:19,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1512 transitions, 45788 flow. Second operand has 12 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 16:33:19,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:33:19,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:33:19,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:33:26,173 INFO L124 PetriNetUnfolderBase]: 6996/12664 cut-off events. [2023-08-26 16:33:26,173 INFO L125 PetriNetUnfolderBase]: For 527554/527554 co-relation queries the response was YES. [2023-08-26 16:33:26,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144853 conditions, 12664 events. 6996/12664 cut-off events. For 527554/527554 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 99975 event pairs, 666 based on Foata normal form. 144/12808 useless extension candidates. Maximal degree in co-relation 144726. Up to 3483 conditions per place. [2023-08-26 16:33:26,305 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1019 selfloop transitions, 1090 changer transitions 0/2109 dead transitions. [2023-08-26 16:33:26,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 2109 transitions, 66382 flow [2023-08-26 16:33:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 16:33:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 16:33:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2507 transitions. [2023-08-26 16:33:26,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2023-08-26 16:33:26,307 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2507 transitions. [2023-08-26 16:33:26,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2507 transitions. [2023-08-26 16:33:26,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:33:26,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2507 transitions. [2023-08-26 16:33:26,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 109.0) internal successors, (2507), 23 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:33:26,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states 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 16:33:26,313 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states 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 16:33:26,313 INFO L175 Difference]: Start difference. First operand has 365 places, 1512 transitions, 45788 flow. Second operand 23 states and 2507 transitions. [2023-08-26 16:33:26,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 2109 transitions, 66382 flow [2023-08-26 16:33:30,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 2109 transitions, 65552 flow, removed 166 selfloop flow, removed 4 redundant places. [2023-08-26 16:33:30,708 INFO L231 Difference]: Finished difference. Result has 392 places, 1795 transitions, 59544 flow [2023-08-26 16:33:30,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=45230, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=838, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=59544, PETRI_PLACES=392, PETRI_TRANSITIONS=1795} [2023-08-26 16:33:30,710 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 365 predicate places. [2023-08-26 16:33:30,710 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1795 transitions, 59544 flow [2023-08-26 16:33:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.58333333333333) internal successors, (1255), 12 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states 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 16:33:30,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:33:30,711 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:33:30,718 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 16:33:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:33:30,916 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 16:33:30,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:33:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 789555168, now seen corresponding path program 5 times [2023-08-26 16:33:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:33:30,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037960417] [2023-08-26 16:33:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:33:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:33:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:33:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:33:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:33:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037960417] [2023-08-26 16:33:30,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037960417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:33:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973438094] [2023-08-26 16:33:30,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:33:30,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:33:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:33:30,999 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 16:33:31,001 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 16:33:31,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 16:33:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:33:31,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 16:33:31,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:33:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:33:31,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:33:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:33:31,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973438094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:33:31,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:33:31,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-08-26 16:33:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533394440] [2023-08-26 16:33:31,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:33:31,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 16:33:31,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:33:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 16:33:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:33:31,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 248 [2023-08-26 16:33:31,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1795 transitions, 59544 flow. Second operand has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 16:33:31,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:33:31,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 248 [2023-08-26 16:33:31,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:33:38,564 INFO L124 PetriNetUnfolderBase]: 6782/12313 cut-off events. [2023-08-26 16:33:38,564 INFO L125 PetriNetUnfolderBase]: For 566377/566377 co-relation queries the response was YES. [2023-08-26 16:33:38,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147349 conditions, 12313 events. 6782/12313 cut-off events. For 566377/566377 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 97838 event pairs, 170 based on Foata normal form. 100/12413 useless extension candidates. Maximal degree in co-relation 147212. Up to 3391 conditions per place. [2023-08-26 16:33:38,825 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 1439 selfloop transitions, 794 changer transitions 0/2233 dead transitions. [2023-08-26 16:33:38,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2233 transitions, 71713 flow [2023-08-26 16:33:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 16:33:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 16:33:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2704 transitions. [2023-08-26 16:33:38,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43612903225806454 [2023-08-26 16:33:38,828 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2704 transitions. [2023-08-26 16:33:38,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2704 transitions. [2023-08-26 16:33:38,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:33:38,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2704 transitions. [2023-08-26 16:33:38,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 108.16) internal successors, (2704), 25 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states 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 16:33:38,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states 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 16:33:38,836 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 248.0) internal successors, (6448), 26 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states 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 16:33:38,836 INFO L175 Difference]: Start difference. First operand has 392 places, 1795 transitions, 59544 flow. Second operand 25 states and 2704 transitions. [2023-08-26 16:33:38,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2233 transitions, 71713 flow [2023-08-26 16:33:44,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 2233 transitions, 70852 flow, removed 372 selfloop flow, removed 4 redundant places. [2023-08-26 16:33:44,303 INFO L231 Difference]: Finished difference. Result has 416 places, 1798 transitions, 61087 flow [2023-08-26 16:33:44,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=57850, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=999, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=61087, PETRI_PLACES=416, PETRI_TRANSITIONS=1798} [2023-08-26 16:33:44,305 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 389 predicate places. [2023-08-26 16:33:44,305 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1798 transitions, 61087 flow [2023-08-26 16:33:44,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.83333333333333) internal successors, (1258), 12 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states 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 16:33:44,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:33:44,305 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:33:44,309 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 16:33:44,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:33:44,509 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 16:33:44,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:33:44,509 INFO L85 PathProgramCache]: Analyzing trace with hash -329106127, now seen corresponding path program 17 times [2023-08-26 16:33:44,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:33:44,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734709143] [2023-08-26 16:33:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:33:44,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:33:44,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:33:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:33:44,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:33:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734709143] [2023-08-26 16:33:44,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734709143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:33:44,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318073266] [2023-08-26 16:33:44,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:33:44,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:33:44,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:33:44,856 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 16:33:44,857 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 16:33:45,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-26 16:33:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:33:45,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-26 16:33:45,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:33:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:33:45,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:33:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:33:45,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318073266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:33:45,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:33:45,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-26 16:33:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820642479] [2023-08-26 16:33:45,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:33:45,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-26 16:33:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:33:45,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-26 16:33:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2023-08-26 16:33:45,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:33:45,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1798 transitions, 61087 flow. Second operand has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 16:33:45,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:33:45,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:33:45,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:33:52,201 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 16:34:11,434 INFO L124 PetriNetUnfolderBase]: 7820/14051 cut-off events. [2023-08-26 16:34:11,434 INFO L125 PetriNetUnfolderBase]: For 680528/680528 co-relation queries the response was YES. [2023-08-26 16:34:11,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174567 conditions, 14051 events. 7820/14051 cut-off events. For 680528/680528 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 111766 event pairs, 482 based on Foata normal form. 7/14058 useless extension candidates. Maximal degree in co-relation 174425. Up to 8627 conditions per place. [2023-08-26 16:34:11,601 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 991 selfloop transitions, 1321 changer transitions 27/2339 dead transitions. [2023-08-26 16:34:11,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 2339 transitions, 79355 flow [2023-08-26 16:34:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-26 16:34:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-26 16:34:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5279 transitions. [2023-08-26 16:34:11,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39419056152927123 [2023-08-26 16:34:11,606 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5279 transitions. [2023-08-26 16:34:11,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5279 transitions. [2023-08-26 16:34:11,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:11,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5279 transitions. [2023-08-26 16:34:11,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 97.75925925925925) internal successors, (5279), 54 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states 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 16:34:11,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 248.0) internal successors, (13640), 55 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states 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 16:34:11,621 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 248.0) internal successors, (13640), 55 states have internal predecessors, (13640), 0 states have call successors, (0), 0 states 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 16:34:11,622 INFO L175 Difference]: Start difference. First operand has 416 places, 1798 transitions, 61087 flow. Second operand 54 states and 5279 transitions. [2023-08-26 16:34:11,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 2339 transitions, 79355 flow [2023-08-26 16:34:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 2339 transitions, 77580 flow, removed 479 selfloop flow, removed 9 redundant places. [2023-08-26 16:34:20,004 INFO L231 Difference]: Finished difference. Result has 469 places, 2134 transitions, 74923 flow [2023-08-26 16:34:20,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=59533, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=74923, PETRI_PLACES=469, PETRI_TRANSITIONS=2134} [2023-08-26 16:34:20,006 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 442 predicate places. [2023-08-26 16:34:20,006 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 2134 transitions, 74923 flow [2023-08-26 16:34:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 93.85714285714286) internal successors, (2628), 28 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states 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 16:34:20,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:20,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:34:20,012 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 16:34:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:20,212 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 16:34:20,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 576035006, now seen corresponding path program 18 times [2023-08-26 16:34:20,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:20,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545698839] [2023-08-26 16:34:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:20,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545698839] [2023-08-26 16:34:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545698839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826028805] [2023-08-26 16:34:20,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:34:20,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:20,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:20,557 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 16:34:20,561 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 16:34:21,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 16:34:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:21,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 16:34:21,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:21,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826028805] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:34:23,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:34:23,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 16:34:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266034418] [2023-08-26 16:34:23,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:34:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:34:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:34:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2023-08-26 16:34:23,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:34:23,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 2134 transitions, 74923 flow. Second operand has 22 states, 22 states have (on average 87.45454545454545) internal successors, (1924), 22 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states 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 16:34:23,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:23,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:34:23,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:36,330 INFO L124 PetriNetUnfolderBase]: 8522/15405 cut-off events. [2023-08-26 16:34:36,331 INFO L125 PetriNetUnfolderBase]: For 770813/770813 co-relation queries the response was YES. [2023-08-26 16:34:36,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193832 conditions, 15405 events. 8522/15405 cut-off events. For 770813/770813 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 125532 event pairs, 644 based on Foata normal form. 18/15423 useless extension candidates. Maximal degree in co-relation 193684. Up to 14191 conditions per place. [2023-08-26 16:34:36,524 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2258 selfloop transitions, 162 changer transitions 19/2439 dead transitions. [2023-08-26 16:34:36,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 2439 transitions, 89532 flow [2023-08-26 16:34:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 16:34:36,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 16:34:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1572 transitions. [2023-08-26 16:34:36,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.372865275142315 [2023-08-26 16:34:36,526 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1572 transitions. [2023-08-26 16:34:36,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1572 transitions. [2023-08-26 16:34:36,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:36,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1572 transitions. [2023-08-26 16:34:36,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.47058823529412) internal successors, (1572), 17 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states 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 16:34:36,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states 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 16:34:36,531 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states 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 16:34:36,531 INFO L175 Difference]: Start difference. First operand has 469 places, 2134 transitions, 74923 flow. Second operand 17 states and 1572 transitions. [2023-08-26 16:34:36,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 2439 transitions, 89532 flow [2023-08-26 16:34:45,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 2439 transitions, 87766 flow, removed 867 selfloop flow, removed 10 redundant places. [2023-08-26 16:34:45,251 INFO L231 Difference]: Finished difference. Result has 484 places, 2269 transitions, 78971 flow [2023-08-26 16:34:45,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=73157, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=78971, PETRI_PLACES=484, PETRI_TRANSITIONS=2269} [2023-08-26 16:34:45,253 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 457 predicate places. [2023-08-26 16:34:45,253 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 2269 transitions, 78971 flow [2023-08-26 16:34:45,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.45454545454545) internal successors, (1924), 22 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states 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 16:34:45,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:45,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:34:45,258 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 16:34:45,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:45,454 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 16:34:45,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2029893476, now seen corresponding path program 19 times [2023-08-26 16:34:45,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:45,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524190160] [2023-08-26 16:34:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:45,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:45,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524190160] [2023-08-26 16:34:45,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524190160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:45,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420140399] [2023-08-26 16:34:45,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:34:45,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:45,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:45,849 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 16:34:45,851 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 16:34:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:46,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 16:34:46,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:46,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:34:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420140399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:34:47,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:34:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 16:34:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854857899] [2023-08-26 16:34:47,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:34:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:34:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:34:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-08-26 16:34:47,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:34:47,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 2269 transitions, 78971 flow. Second operand has 22 states, 22 states have (on average 87.27272727272727) internal successors, (1920), 22 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 16:34:47,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:47,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:34:47,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:54,081 WARN L234 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 42 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:35:00,485 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 16:35:02,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 16:35:04,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 16:35:08,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 16:35:11,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 16:35:13,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 16:35:21,948 WARN L539 Checker$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 16:35:33,277 INFO L124 PetriNetUnfolderBase]: 9421/17149 cut-off events. [2023-08-26 16:35:33,278 INFO L125 PetriNetUnfolderBase]: For 900888/900888 co-relation queries the response was YES. [2023-08-26 16:35:33,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217432 conditions, 17149 events. 9421/17149 cut-off events. For 900888/900888 co-relation queries the response was YES. Maximal size of possible extension queue 935. Compared 142322 event pairs, 756 based on Foata normal form. 22/17171 useless extension candidates. Maximal degree in co-relation 217274. Up to 15614 conditions per place. [2023-08-26 16:35:33,509 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 2436 selfloop transitions, 196 changer transitions 33/2665 dead transitions. [2023-08-26 16:35:33,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 2665 transitions, 97594 flow [2023-08-26 16:35:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 16:35:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 16:35:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2023 transitions. [2023-08-26 16:35:33,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37078445747800587 [2023-08-26 16:35:33,511 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2023 transitions. [2023-08-26 16:35:33,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2023 transitions. [2023-08-26 16:35:33,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:33,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2023 transitions. [2023-08-26 16:35:33,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 91.95454545454545) internal successors, (2023), 22 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states 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 16:35:33,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states 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 16:35:33,518 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 248.0) internal successors, (5704), 23 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states 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 16:35:33,518 INFO L175 Difference]: Start difference. First operand has 484 places, 2269 transitions, 78971 flow. Second operand 22 states and 2023 transitions. [2023-08-26 16:35:33,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 2665 transitions, 97594 flow [2023-08-26 16:35:43,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 2665 transitions, 96670 flow, removed 454 selfloop flow, removed 5 redundant places. [2023-08-26 16:35:43,808 INFO L231 Difference]: Finished difference. Result has 509 places, 2441 transitions, 85454 flow [2023-08-26 16:35:43,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=78055, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=85454, PETRI_PLACES=509, PETRI_TRANSITIONS=2441} [2023-08-26 16:35:43,810 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 482 predicate places. [2023-08-26 16:35:43,810 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 2441 transitions, 85454 flow [2023-08-26 16:35:43,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.27272727272727) internal successors, (1920), 22 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 16:35:43,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:43,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:35:43,816 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 16:35:44,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:35:44,016 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 16:35:44,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1918578436, now seen corresponding path program 20 times [2023-08-26 16:35:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:44,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809185734] [2023-08-26 16:35:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809185734] [2023-08-26 16:35:44,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809185734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:35:44,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537701710] [2023-08-26 16:35:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:35:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:35:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:35:44,323 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 16:35:44,324 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 16:35:44,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:35:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:35:44,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 16:35:44,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:35:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:44,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:36:31,631 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:36:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:36:31,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537701710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:36:31,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:36:31,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 20 [2023-08-26 16:36:31,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214357392] [2023-08-26 16:36:31,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:36:31,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 16:36:31,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:36:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 16:36:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=372, Unknown=20, NotChecked=0, Total=462 [2023-08-26 16:36:31,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 248 [2023-08-26 16:36:31,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 2441 transitions, 85454 flow. Second operand has 22 states, 22 states have (on average 87.27272727272727) internal successors, (1920), 22 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 16:36:31,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:36:31,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 248 [2023-08-26 16:36:31,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:36:40,703 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 16:36:44,245 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 16:36:48,582 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-26 16:36:58,513 INFO L124 PetriNetUnfolderBase]: 9803/17896 cut-off events. [2023-08-26 16:36:58,514 INFO L125 PetriNetUnfolderBase]: For 977459/977459 co-relation queries the response was YES. [2023-08-26 16:36:58,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229850 conditions, 17896 events. 9803/17896 cut-off events. For 977459/977459 co-relation queries the response was YES. Maximal size of possible extension queue 1010. Compared 150253 event pairs, 795 based on Foata normal form. 9/17905 useless extension candidates. Maximal degree in co-relation 229683. Up to 17076 conditions per place. [2023-08-26 16:36:58,775 INFO L140 encePairwiseOnDemand]: 240/248 looper letters, 2521 selfloop transitions, 135 changer transitions 11/2667 dead transitions. [2023-08-26 16:36:58,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 2667 transitions, 98336 flow [2023-08-26 16:36:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 16:36:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 16:36:58,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1562 transitions. [2023-08-26 16:36:58,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704933586337761 [2023-08-26 16:36:58,777 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1562 transitions. [2023-08-26 16:36:58,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1562 transitions. [2023-08-26 16:36:58,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:36:58,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1562 transitions. [2023-08-26 16:36:58,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.88235294117646) internal successors, (1562), 17 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states 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 16:36:58,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states 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 16:36:58,782 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 248.0) internal successors, (4464), 18 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states 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 16:36:58,782 INFO L175 Difference]: Start difference. First operand has 509 places, 2441 transitions, 85454 flow. Second operand 17 states and 1562 transitions. [2023-08-26 16:36:58,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 2667 transitions, 98336 flow [2023-08-26 16:37:10,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 2667 transitions, 96425 flow, removed 942 selfloop flow, removed 6 redundant places. [2023-08-26 16:37:10,741 INFO L231 Difference]: Finished difference. Result has 529 places, 2544 transitions, 88124 flow [2023-08-26 16:37:10,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=83691, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=88124, PETRI_PLACES=529, PETRI_TRANSITIONS=2544} [2023-08-26 16:37:10,743 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 502 predicate places. [2023-08-26 16:37:10,743 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 2544 transitions, 88124 flow [2023-08-26 16:37:10,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 87.27272727272727) internal successors, (1920), 22 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states 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 16:37:10,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:37:10,743 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:37:10,747 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 16:37:10,944 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,SelfDestructingSolverStorable34 [2023-08-26 16:37:10,944 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 16:37:10,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:37:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1309091832, now seen corresponding path program 21 times [2023-08-26 16:37:10,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:37:10,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293755201] [2023-08-26 16:37:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:37:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:37:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:37:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:37:11,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:37:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293755201] [2023-08-26 16:37:11,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293755201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:37:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808590451] [2023-08-26 16:37:11,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:37:11,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:37:11,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:37:11,263 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 16:37:11,270 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 16:37:11,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 16:37:11,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:37:11,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 16:37:11,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:37:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:37:11,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:37:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 16:37:42,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808590451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:37:42,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:37:42,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-08-26 16:37:42,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779564018] [2023-08-26 16:37:42,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:37:42,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 16:37:42,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:37:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 16:37:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=421, Unknown=12, NotChecked=0, Total=506 [2023-08-26 16:37:42,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 248 [2023-08-26 16:37:42,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 2544 transitions, 88124 flow. Second operand has 23 states, 23 states have (on average 94.26086956521739) internal successors, (2168), 23 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states 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 16:37:42,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:37:42,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 248 [2023-08-26 16:37:42,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:37:44,499 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div c_~k2~0 4294967296))) (.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296)))) (and (forall ((~m~0 Int)) (or (let ((.cse0 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse0 .cse1) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< 1 ~m~0))) (< 0 c_~m~0) (= c_~i1~0 0) (<= (+ .cse2 2) (+ c_~k2~0 (* c_~m~0 2))) (= (mod c_~k2~0 4294967296) 0) (<= (+ c_~k2~0 (* c_~j1~0 2)) (+ (* (div (+ (* (- 1) c_~k1~0) 1) 4294967296) 4294967296) .cse2 c_~k1~0 1)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse3 .cse1))) (< 1 ~m~0))) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 16:37:49,046 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296)))) (and (forall ((~m~0 Int)) (or (let ((.cse0 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse0 .cse1) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< 1 ~m~0))) (< 0 c_~m~0) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse2 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse2 .cse1))) (< 1 ~m~0))) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 16:37:51,302 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 1) c_~k1~0)) (.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296)))) (and (<= c_~k2~0 (+ (* (div (+ .cse0 1) 4294967296) 4294967296) (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0 1)) (forall ((~m~0 Int)) (or (let ((.cse1 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse1 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< 1 ~m~0))) (< 0 c_~m~0) (<= c_~k2~0 (+ (* (div (+ (- 1) c_~k2~0 .cse0) 4294967296) 4294967296) c_~k1~0 1)) (= (mod (+ c_~k2~0 (* c_~m~0 4294967294)) 4294967296) 0) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse3 .cse2))) (< 1 ~m~0))) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-26 16:38:43,917 WARN L234 SmtUtils]: Spent 18.31s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:40:22,084 WARN L234 SmtUtils]: Spent 1.13m on a formula simplification. DAG size of input: 66 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 16:40:58,868 WARN L234 SmtUtils]: Spent 16.17s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-26 16:43:44,450 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 16:43:44,450 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 16:43:44,707 WARN L266 SmtUtils]: Removed 6 from assertion stack [2023-08-26 16:43:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 16:43:44,708 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 16:43:44,716 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 16:43:44,909 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,SelfDestructingSolverStorable35 [2023-08-26 16:43:44,909 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. [2023-08-26 16:43:44,910 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 16:43:44,910 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 16:43:44,910 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 16:43:44,910 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 16:43:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 16:43:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 16:43:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 16:43:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 16:43:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 16:43:44,911 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 16:43:44,911 INFO L445 BasicCegarLoop]: Path program histogram: [21, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 16:43:44,914 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 16:43:44,914 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 16:43:44,916 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:43:44 BasicIcfg [2023-08-26 16:43:44,916 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 16:43:44,916 INFO L158 Benchmark]: Toolchain (without parser) took 838479.91ms. Allocated memory was 377.5MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 353.8MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-26 16:43:44,917 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 377.5MB. Free memory is still 353.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:43:44,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.48ms. Allocated memory is still 377.5MB. Free memory was 353.4MB in the beginning and 342.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 16:43:44,917 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.96ms. Allocated memory is still 377.5MB. Free memory was 342.6MB in the beginning and 340.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 16:43:44,917 INFO L158 Benchmark]: Boogie Preprocessor took 36.27ms. Allocated memory is still 377.5MB. Free memory was 340.9MB in the beginning and 339.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 16:43:44,917 INFO L158 Benchmark]: RCFGBuilder took 426.06ms. Allocated memory is still 377.5MB. Free memory was 339.4MB in the beginning and 324.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 16:43:44,918 INFO L158 Benchmark]: TraceAbstraction took 837731.42ms. Allocated memory was 377.5MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 323.8MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. [2023-08-26 16:43:44,919 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 377.5MB. Free memory is still 353.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 232.48ms. Allocated memory is still 377.5MB. Free memory was 353.4MB in the beginning and 342.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.96ms. Allocated memory is still 377.5MB. Free memory was 342.6MB in the beginning and 340.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.27ms. Allocated memory is still 377.5MB. Free memory was 340.9MB in the beginning and 339.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 426.06ms. Allocated memory is still 377.5MB. Free memory was 339.4MB in the beginning and 324.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 837731.42ms. Allocated memory was 377.5MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 323.8MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 4.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 115 PlacesBefore, 27 PlacesAfterwards, 117 TransitionsBefore, 23 TransitionsAfterwards, 972 CoEnabledTransitionPairs, 8 FixpointIterations, 71 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 120 TotalNumberOfCompositions, 991 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 991, independent: 991, independent conditional: 0, independent unconditional: 991, 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: 505, independent: 505, independent conditional: 0, independent unconditional: 505, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 991, independent: 486, independent conditional: 0, independent unconditional: 486, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 505, unknown conditional: 0, unknown unconditional: 505] , 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 PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 54 for 135713ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 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: 837.6s, OverallIterations: 36, TraceHistogramMax: 5, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 723.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 2708 SdHoareTripleChecker+Valid, 44.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2708 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 42.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 538 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 399 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14264 IncrementalHoareTripleChecker+Invalid, 15208 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 399 mSolverCounterUnsat, 0 mSDtfsCounter, 14264 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1313 GetRequests, 587 SyntacticMatches, 63 SemanticMatches, 662 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 5492 ImplicationChecksByTransitivity, 342.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88124occurred in iteration=35, InterpolantAutomatonStates: 518, 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: 0.2s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 99.4s InterpolantComputationTime, 962 NumberOfCodeBlocks, 954 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1313 ConstructedInterpolants, 27 QuantifiedInterpolants, 22884 SizeOfPredicates, 127 NumberOfNonLiveVariables, 3668 ConjunctsInSsa, 350 ConjunctsInUnsatCore, 88 InterpolantComputations, 10 PerfectInterpolantSequences, 177/610 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